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  1. New to the this forum but a seasoned vet on others. I’m posting to see if anyone else is having brake issues after the TSB for the brakes on the 3500 L5P. If not to keep an eye out. Long story short, we just finished a 12 day camping trip up the coast of California. On the last day we headed home which is 4 hours away pulling our 5th wheel. (2023 Momentum 395M). 30 minutes from home, We were getting on the interchange and noticed some clear white smoke corresponding with my break pumps. On the third pump I lower my trailer breaks thinking it was set too high cause of the steep grades. Pumped again and that’s when I got a steady white smoke. Pulled over right away and inspected to find fluid leaking in front of the driver rear tire and a small fire. First thing I do is shut off the truck. Run around and get my wife out of the truck so we can kids and dogs out. As I turn around my 4 year is strapped in his car seat with flames all up the rear door and back glass. It happened so slow and fast at the same time. All I could think about is that glass breaking and the oxygen sucking the flames in and watching my son burn to death in front of my eyes and I can’t do a damn thing. I did indeed get him out and the family in to the trailer. We were stuck in what I call the kill box now. It’s 2 major freeways that interchange in to a 2 lane highway with at least 1/4 of concrete barrier on both sides with no turn outs not too much further up. We were lucky to stop where we where. We tried to put out the fire out with 4 extinguishers between the truck driver, tow truck driver and myself with no anvil. At this point I have to either get my family out of the trailer or unhook and try to drive off. Well ….. we were able to unhook. Jumped in the truck knowing turning on the fuel pump was a terrible idea. The thought of my family sitting on the upper deck on top of 2 propane bombs under them just gave me the push I needed to commit. Turned her on and floored it. The truck had exploded with me in it. I still remember seeing the flames all around, the heat and smoke in the cab. I was able to exit the vehicle after that excess fuel to burn off. I suspect that the initial fire started on the passenger rear and moved to the driver rear. As there are tire stamps from the right rear some something hot, melting or leaking for over 80 feet. Where I stopped first. You could see that it was leaking where the tires would be. Puddle is wet on the right side and the left is burned. if fuel was leaking, there would be a fuel burn line or fire. This is what I think happened but we will have to wait and see what the experts say. We are very fortunate that there were no injury or fatalities. Insurance company has taken custody of the truck and investigation is pending. I only have 17k left on the loan and had 15k of parts and labor in to it. Mods were as follows. 35x12.5 wrapped on 20” Fuel Triton wheel, K&N drop in filter, S&B 62 gallon fuel tank, Retrax hard roll up bed cover, B&W 5th wheel hitch and custom mudflaps. All I know is that I almost lost my family, trailer and truck that I’m most likely going to lose on. 3500 was purchased certified used last June around 14,000 miles and burned down last Thursday with about 16k on it. Now the adrenaline and shock has worn off. The anger and ptsd is kicking in. We wouldn’t have gotten out with our skin suits with out the help of the kings if all kings …God, the 2 Good Samaritan and our great first responders. In the end of the day I have my family and health and thankful for that. I’ll be posting my outcome, as soon as I hear back and case is closed.
  2. I have a 2019 L5P with 72k on it. Bought it last June from a dealership with 51k on it. Few months ago, I tried to go get it aligned at a Big O and was told they couldn't do it because it needed new pitman, idler, and inner tie rods. Got it on the lift few days later and decided pitman and idler were getting replaced, but tie rods didn't seem bad. Bought the parts, took it to a reputable shop, and had them replace them and align it. They scoped out the tie rods and agreed they weren't bad. Fast forward to a week ago, truck is out of alignment again and has slowly been getting worse. I have play in my steering wheel, rides rough, and discovered today that my ball joint on my driver side lower control arm is leaking grease. Once again checked my tie rods and still mechanically appear fine. I won't lie, I do not know all there is to know about these trucks, and I've been learning as I go. With all this being said, I'm looking for any information, any tips, any things to look for, or even common problems that I may need to look out for in the future. I'm on my own trying to figure this all out and the only thing most other shops do around here is treat me like a dumb blonde chick. Last shop I took it to is booked out now for over a month or I'd go back there. Any help would be greatly appreciated.
  3. Thom Cannel: Article & Photos Zane Merva: Photos & Video GM-Trucks.com June 25th, 2019 By now you prospective 2020 Chevrolet Heavy Duty owners are over the Ho-Hum of our 2020 Silverado 3.0-liter story (we are totally Ho-Ho-Ho and Hmmm, can’t wait for a longer test!) and looking at the Alpha Dog, the 35,500-pound tow-rated Silverado Heavy Duty and its over 50 industry firsts including an updated diesel engine and all-new 6.6-liter gas engine. Let’s get to it. Where to start? With its amazing trailer towing features that include 15-view camera and ability to memorize the features of five different trailers? How about the Durabed with its class-leading cargo volume and all-steel construction with a plethora of cargo tie-downs? Maybe you’re gobsmacked by the corner and bed steps with, now, plenty of toe room and 500-pound weigh-holding capacity? Is it the power tailgate that remotely lifts or lowers? An ability to hold first gear while towing maximum weight? Or, is it all of these? Chevrolet states that Heavy Duty trucks are working vehicles, whether towing a gooseneck horse trailer or flatbed and whether gas or diesel-powered. They further tell us that, compared to light duty trucks where 84-percent are retail and 12-percent go to fleets, Heavy Duty buyers are 70-percent retail and 30-percent fleet. Further, Work Truck and Custom trucks make up the volume; LTZ and High Country capture an even larger share of the market for personal and dual use buyers, with mid-trim LT trucks straddling fleet and personal use. Hence the five available trim levels to suit the needs of every buyer. There is no mistaking that the 2500HD and 3500HD is kin to the 1500, yet only roof sheet metal is common. Everything about the new HD trucks was designed to be functional from larger grille to lower side-height bed, to improved box and bed steps. It’s massively bold with strong character lines, huge fender wells and functional hood scoop. Both the 2500HD and 3500HD are distinctive and clearly Chevrolet. For 2020, every frame is boxed and steel, there’s a model with built-in gooseneck cross-body reinforcements and bed holes, 4X4 models can option Autotrac two-speed electronic transfer case, the DEF tank is relocated inside the frame rails with the filler under the fuel door, plus a 10-segment DEF gauge measures content. A statistic to toss off at your microbrewery; within the total HD segment, 54-percent are Crew Cab diesels while within fleets, 62-percent are gas-powered, with 34-percent of fleets buying Crew Cabs and diesel power. And if you’re wondering where the 2020 Silverado HD you’d like to scope out on your dealer’s lot is hiding, Crew Cabs began delivery last week with Regular Cab, Double Cab and Duallies hitting the streets this fall. Restrain yourselves. Let’s now talk about the biggest reasons for owning a Heavy Duty Chevrolet (or GMC). It’s towing. And if you’ve noticed comments to our 15-camera article, there’s some passion about technology. Realistically, as many HD trucks are sold to new truck owners towing large RVs, anything that improves road safety is flat wonderful. If you further read Chevy’s research that says 12-percent of pickup drivers have gotten into a fight with their significant other over trailer hookup, you’ll understand executive chief engineer Tim Herrick’s comment that “We save marriages.” Having driven every truck segment from light duty to tractor-trailers we feel you. So, when research says a majority of drivers are stressed by towing, please offer them a 2020 Silverado sales brochure and a tissue (and save a tissue for yourselves ‘cause you might be exaggerating your tow-cool). So let’s dive deeper into the subject. Everyone has a hitch camera these days, with overlaid guidelines to put you within a few inches, front-to-back, of the ball. Chevy goes further with a selectable view that looks own over the ball. Even those who haven’t set a hitch in years—or never—can get within a quarter-inch of perfect. And an APB or automatic parking brake engages automatically so that when you lift off the brake pedal you don’t roll off the ball. Sticking with the non-pros and semi-pro haulers, there’s a checklist for your trailer, the ability to check the lights after connecting the trailer’s electrical system, a tow-haul reminder and VIN-specific labels for the trailer itself. If you option the smart trailer integration, which is designed to work with ASA Electronics iN∙Command® control system, you have control over trailer features like heat and air conditioning through the infotainment system or the myChevrolet mobile app. And nobody should turn down the ability to monitor trailer tire pressure and temperature. Blowouts are never convenient and most often low-pressure and highly temperature related, according to Michelin Tire Company. We found the 15-view system difficult to get used to during the first five minutes, particularly when backing; our mirror habits are embedded. Yet, simulating tight turns where we could see along both the tight and far side, pulling forward into a tight box, or backing (after a few tries), we really came to appreciate what the system could do. Then, on the highway with an 18,000-pound box trailer behind us, mirrors just didn’t cut it compared to the high-tech camera system. We were driving on twisting two-lane blacktop in mountain foothills. Using the entire camera tech set, particularly the ability to look out the back of the trailer, we could easily pick places to pull aside to let faster cars pass us. It took less than an hour to become a must-have feature. Later we towed a smaller skid-steer on a flatbed without the system and truly missed it despite using our slide-out mirrors fully extended. This naturally leads to the two engines offered in the 2020 Heavy Duty, first the 6.6-liter V-8 purpose-built gas engine that delivers 22-percent more torque than its predecessor. Now it delivers 401 horsepower and 464 lb-ft of torque. It’s mated to a six-speed automatic transmission. The 6.6L isn’t a just a 6-mm stroked 6.0L, rather it takes advantage of the Gen5 small block architecture and has a unique cast iron block with forged powdered-metal connecting rods and forged crankshaft. The most significant change is the addition of Direct Injection. It’s all new, an industry first for the heavy-duty market and new to GM trucks. Direct Injection allows a compression ratio of 10.8:1 Quoting Mike Kociba, a GM engineer and part of the Small Block team, “Our suite of changes allows us to hit class-leading gasoline engine torque, at 464 foot-pounds at a lower engine speed than the outgoing six-liter was optimized for. I'm proud of its 401 horsepower, which is SAE Certified; no games, it’s legitimate. Customers can have confidence they're going to tow whatever trailer they need.” Don’t forget the larger cooling fan and newly designed water pump. The pump drives the fan through a one-inch shaft with unique bearing design to handle greatly increased thrust loads. Plus, the oil pump is now has variable output, so there’s less parasitic losses. The 6.6L engine features an aluminum oil pan, nylon 6-6 air intake, and stainless steel exhaust manifolds unique for the Heavy Duty market. Like related light duty Gen 5 motors, this motor has variable dual-equal valve actuation, massive Gen5 valves and uses an actuator that’s mounted to the front cover to control intake and exhaust valves. The new block features inter-bore cooling, that is, coolant flows through Siamesed bores, notably in the upper bores where there’s a tendency to generate higher temperatures. “Small engines with turbochargers allow them peak torque off idle,” Mike told us, “but for heavy duty we don't want that complexity. For the Heavy Duty segment we (General Motors) have durability requirements—Global Engine Durability—that are unique stringent. We know our customers and why we focus on durability. If they can't use their truck today, they might not get paid.” When towing a heavy load, we loved the diesel’s engine braking capability. What about the gas engine? In Tow-Haul, up-speeds caused by downhill driving—together with intelligence based on throttle position—the powertrain produced seamless downshifts. It’s not quite the same as engine braking, but the trailer was “only” 12,000 pounds. Regardless, it was a comforting addition to stress-free towing. The six-speed transmission used for 2020 Heavy Duty GM trucks is an updated 6L90 with an uprated torque converter and clutch pack. According to GM engineer Rich Mardeusz those changes were simple. When it came to the torque converter, things changed. “We looked at the components from a heavy-duty diesel torque converter and a high-output gas torque converter and then took the torque-carrying components from the diesel and married them to the spring and damping components from the gasoline torque converter. That’s what was needed to accommodate the approximate 22 percent across-the-board torque increase.” Those changes also damp out firing frequencies from the gasoline V-8 engine, making the powertrain smoother. Since a majority of buyers opt for the diesel engine, let’s look at that. Also displacing 6.6-liters, the Duramax turbo-diesel makes 445 horsepower and 910 lb-ft of torque. It’s coupled to a 10-speed Allison transmission. There were minimal changes to the engine for 2020. They include a 28-inch fan for cooling; upgraded oil cooler—now 19 plates instead of 14 and the cylinder head gasket was improved. Engine brake capacity is greater by 14-percent and while there’s a button for manual activation, while in Tow-Haul mode engine braking is automatically activated at certain RPMs. It’s Chevrolet keeping you safe. Thus, under the new control system the powertrain will recognize any need for the engine brake and activate automatically. For instance in driving down hill and forgetting to shift, the higher RPM means automatic activation. We did experience this with the18,000 pound box trailer and it is amazingly transparent and surprisingly quiet. You don’t have to downshift on modest hills, as the system will totally keep you at, or near your desired speed. Of course you may have to use a bit of smooth brake application if the grade is longer, or steeper. For really steep downhilling Plus-Minus buttons on the column-mounted shifter initiate gear changes. We’re not huge fans of the buttons as the steering wheel obscures their location and make it a bit fumbly to slide your thumb into position. A really important feature for 2020, diesel models add an engine after-run feature. Should you tow up a grade and park for dinner without a cool-down, the truck will do it for you. Run time is limited by temperature and shutdown is equally automatic. Because of the Allison/GM 10-speed transmission used for 2020, the powertrain required a complete recalibration. There are several positive results, according to David Ames, GM assistant chief engineer and Allison liaison. “Emissions have been improved and fine-tuned to maintain the best efficiency the transmission can offer to our customers.” It also has a fully warranted chain-driven engine-speed PTO available from the factory. The new 10-speed’s torque converter has a lock-up clutch that is unique as it will lock up in first gear, even under max loads. So, if you're pulling 35,500 pounds, you can do a first gear launch and lock up right away, which helps get rid of heat. We asked David why this is important. “Normally in first gear you're under high torque and generating a lot of heat, which puts a lot of demand on the cooling system. Locking up gets rid of that heat. Also, the new transmission has a lower 4.5:1 first gear with four planetary gear sets and six clutches. We noticed the low gear and ten speeds on launches and while pulling the box trailer on the highway. Often in hilly driving you're downshifting to save brakes; with ten gears we held the right speed and best RPM, particularly with automatic engine braking. We did drive a Silverado 3500HD dually at max capacity; 35,500 pounds on a closed course: our US Army CDL permit has lapsed. The claim of off-the-line torque is spot on. What was most interesting was the 3500’s ability to resist being pushed about on turns and we did several random serpentine loops to see if we could find any significant push? Nope. Later, with “only” 17,000 pounds behind us we finally found a bit of trailer push, which required a deeply rutted dirt road and an off camber turn. Nothing the truck couldn’t handle, even with a journalist behind the wheel. Many of us wondered why the different transmissions for Heavy Duty trucks, why not just the Allison ten? We asked and, while suspecting that plant capacity utilization and raw costs have something to do with it, were told by Vincenzo Verino, the 3.0L Duramax global chief engineer “It’s really about what the transmission brings to the engine itself. With a wider torque band, the gas engine is well-matched to a six-speed, while the narrower torque band of the Duramax is better suited to a 10-speed.” In the battle for Heavy Duty supremacy, big numbers are thrown around to convince potential buyers of worth and value. We found these slides from Chevrolet’s presentation compelling, showing Chevrolet doesn’t always have the biggest power numbers, yet can deliver more real world competency than competitors. Faster to 60 with better towing capability, we’ll take that over a bigger number any day. And Chevrolet says every diesel dually will tow more than 30,000 pounds the 2500HD with 6.6L gas engine has a tow capacity of 17,400 pounds, up 18-percent, that’s good regardless altitude. There is much, much more to tell in future stories, like the no-cut removable fascia for winter snow plow installation and the covered fender-mounted engine heater outlet, use reports of the up-down power tailgate and the bed’s 12 fixed and 9 moveable tie-downs. There’s details on improved axles, locking rear differential, beefed-up prop shaft and 12-inch ring gear, stronger U-joints, class-exclusive SLA front suspension (“mandating a solid front axle for HD trucks isn’t a thing” according to the chief engineer Tim Herrick) and the list goes on. We expect to write several more stories about the new trucks, each specific to how you’d use the truck and with even more details. We have only scratched the surface.
  4. Hello I am looking at buying a 21 duramax and I noticed that some have a GVWR of 11,150 than and others have a GVWR of 10,000. I’m curious if there is an actual difference in parts or engineering or is it only for registration purposes? Any information is helpful, thanks!
  5. I am looking to add an elevated idle feature to my 2018 Chevy sliverado 3500 duramax Dually. My truck is currently not set up with the pto feature. I currently idle my truck for about an hour a day and I am wanting to add an elevated idle to get my truck to operating temp faster to prolong the life of my truck. What are y’all adding to the truck for aftermarket parts to achieve this since the dealer is saying it’s not possible with gm parts. What else are y’all running for tuners to increase mpg that will work great with a fully deleted truck.
  6. I purchased a 2023 2500hd LTZ DURAMAX in January. Truck drove and handled great until a few days ago. The other day I started feeling the rear end wandering and swaying on me. Anything over 65 is an accident waiting to happen because it can get all over the place. Noticed that if I shake my driver side rear wheel it clicks loudly. Checked lugs and everything else for tightness and everything is tight. Truck now has 25,000 miles it and up until 3 days ago was perfect. Any ideas or insights would be greatly appreciated. Thank you. 20230922_203351_1.mp4
  7. I purchased a 2023 2500hd LTZ DURAMAX in January. Truck drove and handled great until a few days ago. The other day I started feeling the rear end wandering and swaying on me. Anything over 65 is an accident waiting to happen because it can get all over the place. Noticed that if I shake my driver side rear wheel it clicks loudly. Checked lugs and everything else for tightness and everything is tight. Truck now has 25,000 miles it and up until 3 days ago was perfect. Any ideas or insights would be greatly appreciated. Thank you. 20230922_203351_1.mp4
  8. Hello, I am about to buy a 6.6L Duramax 14' 2500hd Sierra with 136K on it. But I just learned it has a small heating core leak, the dealer is replacing the whole core prior to purchase. Should I proceed with this purchase? Or is this the sign of this truck going down hill. The service recorded were regular until 2018 then the car fax no longer shows any updates. Any help would be appreciated, I have a 92 Sierra with a 5.7L small block so the diesel world I am not as comfortable with. Also do not want a newer truck as I do not want to deal with DEF and I would not be able to do a delete.
  9. So recently I cracked the bell housing to my transmission and it lost all the oil, so I’ve been looking at good used transmissions. My question is what years are compatible with the 2006s? I’ve heard the plugs vary year to year making some incompatible with different years. Any advice would be awesome.
  10. 2020 2500 Duramax. Is anyone else having problems with their trailer lights? I’m having problems with the lights on all but one of my three trailers. Left turn signal and brake is not working. Took it to the dealer and they gave me some bs about how the truck can’t run led lights or more than 10 amps and blew me off. So essentially my brand new truck I bought for towing can’t tow a trailer with more than two tail lights. One of the two it isn’t working on is led and one is not and it runs the led lights just fine, just not the left turn or brake on both.
  11. Chevrolet recommends AC Delco Diesel Exhaust Fluid in 2021 Sliverado HD Duramax. Is their a difference in AC Vs Blue? Most Stores don't carry AC brand.. is it worth ordering online or is any DEF fluid okay?
  12. Anyone have issues with a coolant leak the dealer “can’t find”. I bought my l5p denali duramax about 6 months ago and have put 15k on it in those 6 months. Mostly used for pulling my 43’ fifthwheel. Anyway the issue. At 3k the low coolant light came on and I brought it to the dealer. I was told air had not been properly removed from the cooling system when assembled so they burped it and I was on my way. I was good till 11k miles. At 11k the light came on again and I brought it in. The radiator was replaced, brought it home and started it a couple days later and the coolant light came on. Called the dealer same story burping air out so I topped it off myself. 11k noticed coolant puddle under it and coolant drips on passenger frame rail by front bumper. Brought it in and dealer couldn’t find a leak so I took it home. Two days later the coolant light came on and multiple drips were on the frame. So at this point I have executive GM involved with trying to figure it out. A couple things at this point have me worked up. Not one time was I offered a loaner car not once. After the radiator was replaced they put The plastic skid plate one under the radiator and broke it and left it on. So now I want a loaner when I drop it off. I wait almost a month before they give in and give me one and bring the truck back in. At this point the over flow is almost empty so it’s not leaking very fast. The truck now has 15k on it. I bring it it in and get a loaner car for the first time with 15k on it and the 4th visit in 6 months. Dealer still can not find a leak. I asked them to climb under they truck and look at the frame rail for coolant. He calls back and says it’s dry. So I send my wife to pick the truck up. She drives 15 miles home from the dealer and that’s it. When I got home from work I checked under the truck and it’s dripping coolant. So a couple of things so far, executive GM has done not one thing to help me out. I have done everything myself. They don’t return calls and do not return emails. The last time I brought my truck in the dealer refused to give me any paperwork showing that they actually looked at it they just gave me paperwork from my previous visit. He service advisor keeps telling me it’s burping out air and it’s residual coolant from the radiator replacement 4K miles ago and 2 months ago. I don’t know what to do. I have lost all respect for GM and their product.
  13. new here. just throwing this out there to see if anyone has info on how hard it is to convert the front bumper on a 2006 Silverado 2500HD to a 2018 Silverado 2500HD or what needs to be done to get it done. heres a picture i found on Facebook of it done. just need more info.
  14. Brand new oem bosch injectors for an LML 2011 through 2016. $2,600 for the complete set of (8) shipped anywhere in the contiguous U.S. NO cores are required.
  15. This question has probably been answered on here a hundred times over but I can't seem to find any search results that match exactly what I'm looking for. My dad has 07 Classic with the LBZ Duramax. He absolutely loves the truck and plans on running it til the day he dies. With that being said, his biggest complaint is the fuel mileage he gets out of it. He averages 12-14MPG no matter how he drives it even when towing our boats/campers. He keeps sending me links to sketchy sites with tuners that are dirt cheap and claim to greatly improve fuel mileage. I'm smart enough to know not to go cheap when it comes to tuners/programmers. Can anyone provide any recommendations on somewhat affordable tuners that increase fuel mileage enough to warrant buying one in the first place? Or any other ideas to help squeeze some more MPGs out of it? Any input is greatly appreciated!
  16. I have a 2020 GMC 2500 AT4 Duramax Diesel. Fuel economy is normally 18-20 mpg local and 21-25 mpg highway. I've noticed multiple times that if I completely fill the tank up, that my instantaneous fuel economy and average drop significantly. Instantaneously runs about 8-12 mpg and my average over the last 50 miles drops down to 11-13 mpg. Then suddenly after about 25-50 miles of driving, it will jump right back up to good fuel mileage. If I never completely fill the tank, this doesn't happen. Dealer says they've never heard of this, but I don't trust dealership feedback. Previously I had reported multiple times that DEF fluid levels were completely wrong and erratic and they said there were no reports about it. Then miraculously there was a software recall that fixed it.
  17. I have a 2003 Chevy 2500hd 6.6l diesel. All gears and shifting were working fine. Pulled out on highway today and had to get on it. When going through gears I heard it slip up and rev as if it slipped out of gear. I slowed down and got off road. It seemed to be stuck in 3rd gear. I tried putting it into reverse and it would not work. The shifter doesn’t even feel like it’s moving into gear when I move into reverse. When I move shifter to Drive, it sounds very rough and it starts off in 3rd gear. The truck will not shift out of this stuck gear, not even go into reverse. Had to put home slowly in that gear range. Need some help, What’s going on?
  18. I have a 2001 2500 HD with ZF6 6 speed manual transmission 4*4, I bought the truck at a deal and am finding out why......it's a unicorn...lol. I am just a blue collar worker like most of the rest of us and can't afford the $3500 price tag on a rebuilt trans especially since I don't have a $1000 core transmission to trade them. I still have the transfer case and driveshafts and all other parts to the 4*4 trans..I found a 2wd ZF6 6 speed trans with only 140,*** miles on it I can get at a steal and am wondering if I can change tail shaft and make the 2wd into a 4*4 transmission? Any help would be greatly appreciated even possibly part #'s if possible.....I guess I can drive the truck as a 2wd if I have to but 4wd is one reason I bought the truck....BTW this is my first diesel so any and all help is appreciated..... ONE I WILLIE
  19. I am reaching out to our community. If you own a model year 2020 Silverado/Sierra 2500/3500 DURAMAX Please attach a video clip of the instrument cluster while traveling down a grade(hill) and applying the brake briefly to activate the Auto grade brake feature. I am really looking for early production vehicles here but any and all that are MODEL YEAR 2020 will help, the earlier the better. This will not take long and your help will be GREATLY appreciated!! Please note the production date of your vehicle this can be found on the B-pillar placard. Also if the vehicle has been into the dealership for any service/recall/SIB that required your vehicle to programmed(updated software) please note that as well. THANK YOU!!!!!!
  20. 8070 miles So as I take off from a stop sign the truck seems to be lugging and I guess you’d call it bucking. If I hard accelerate it goes away. It’s only at low rpm. It’s at the dealer now for three days and they tell me they are talking to Gm engineers and truck could be there for a week or two minimum! Obviously after spending 90k$ Not what I want to hear. They’ve never had this problem before. I did need to put it in four wheel drive for a few min to get out of some loose sand on construction site. But put it back in 2 wheel with no problem. Anyone have this problem. Of course I’m also supposed to be going on a 1500 mile trip in ten days. Not feeling real comfortable with this truck now!! Please help!!!
  21. I just got a 2002 GMC Sierra 2500HD Duramax 6.6 L. 4WD. I have been driving a gasoline 8.1L Silverado of same year and size, but 2wd. I know nothing about diesel trucks and want to be sure to take care of it as best i can. Would appreciate any recommendations regarding starting procedures, driving a diesel vs. gasoline, what to be prepared for come winter, ANY suggestions that you may have to help me take the best care of and get the most out of this replacement truck would be greatly appreciated!
  22. In regards to recall N192273630, has anyone noticed a drop in fuel milage after having the recall done? Being the cynical guy that I am, I'm thinking we'll have issues like VW & Dodge did a while back. BTW...I just LOVE the milage I'm getting with mine! ?
  23. Anyone having issues with their steering column? Posting a video, I’ve gotten the service steering column lock a couple of times and the dealer says it’s only a stored code for “loss of communication” so they don’t really know how to diagnose. The steering lock or gear shift column lock is randomly engaging- doesn’t do it all the time unable to upload vid for some reason
  24. We are upgrading to a 2020 GMC AT4 HD 3500 and should be delivered soon. Asking $47,000 Follow this link for additional photos Facebook Marketplace ad So...Look no further for your next tow vehicle! Tow in style, tow with confidence!! This 2015 GMC Denali HD 2500 in Black Onyx has all the bells and whistles and more! She has only 52500 miles on her! This truck has been upgraded with BlueOx Gooseneck Hitch, a Second 7 Way connector in bed to secure your Gooseneck or Fifth-Wheel camper trailer wiring harness to help you tow in comfort and with confidence. It has also been upgraded with a Pop-A-Lock remote lock actuator for tailgate (unlocks tailgate when you unlock your truck). To help with those horrible GM headlights, this Denali has been upgraded with GTR Lighting Gen 5 HID 5000K headlights and Morimoto XB LED foglights...I cannot begin to tell you how much of a difference this has made! For just that little bit of oomph or MPG, this GMC has also been upgraded with the Banks Ram Air intake and Banks exhaust with chrome tip. Upgraded Shocks to BILSTEIN 5100 series shocks at 43500 miles. A Banks AutoMind programmer, is available and negotiable with purchase of this 2015 GMC Denali HD.
  25. My issue is a little bit different however none the less an annoying one. So yesterday i bought some led bulbs off amazon to replace the dome lights in my truck, i got them opened them up all looks good and then go to put them in, and as i did they turned on not an issue however they where to small so i have to return them, i put the old one back in and not lights in the dash and dome lights are acting up. So it was the left front one i tried it in and took it back out no others. Now none of the lights turn on by the button inside the truck. (door lights and turning them on by the small switch which turns them all on works just fine. when the door is open i can now turn the light off by pressing the button. now those issues are a little less of a bother to me, however the radio (which still works perfect) now has no lights, same with the driver info center buttons 4wd actuator light and the lights on the steering wheel lights. All the buttons however still work perfect it is just the lights. Any help is much appreciated ! Truck is a 2008 GMC sierra 2500HD SLE Diesel crew cab long box
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