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Found 138 results

  1. T1 Exhaust

    Cutout system installed on my Trail Boss
  2. I don't know much about this system, how it operates, the stress that is placed on the lifters during cylinder deactivation. How common is this failure? Been watching some YouTube videos on the repair and it's very labor intensive...heads have to come off, etc. I see that you can buy the entire kit (lifters, gaskets) for around $500. Have a friend that told me...just change your oil, you'll be fine. The number one cause of this failure is neglected maintenance. That true? Or is it an inherited problem with the design of the system? The system came out in 2007, there must be some improvements made to it since then, no? I must say that the AFM is allowing me to get some excellent fuel economy out of a full size truck. So is this a common problem, or are there people with 200,000 on these trucks that never had an issue with it?
  3. I currently have a mbrp exhaust and a k&n cold air installed just wondering what peoples opinion on throttle body spacers are and what other performance parts people recommend thanks. 0
  4. Looking at buying a 2012 Ltz 4x4 with 125,000 miles on it for 13k. yay or nay? Looks to be well maintained, seems solid on the test drive.
  5. RX Speedworks Catch Can

    I have an RX Speedworks catch can that i had installed on my 2016 Sierra. It attaches using the bolt for the brake fluid. Has the clean side separator that I used as well but not included in the pics but can provide more pics upon request. Will work on other vehicles. My price is obo shipped. TIA. https://www.rxspeedworks.com/product/gmc-sierra-oil-catch-can/
  6. Just bought an Edelbrock supercharger for my 2014 5.3 with out the Edelbrock tuner. Got an unreal deal of 4500 for it!!! Couldn't pass it up!! I search and couldn't find much information on getting a reputable tune other than black bear. Just wondering if anyone has a reputable shop in South Florida or a shop that uses HPtuners that would be good over email.
  7. I have a 2004 yukon with a slight oil leak. Not sure where it’s coming from bu found a small hairline crack in oil pan. What’s the best way to remedy this? Weld it, epoxy it, or replace it? Is it even an issue if it’s a small leak or can it catastrophically fail one day?
  8. Can you guys offer any suggestions or tips before I go to stealership? '16 Sierra Denali, 40,100 miles. I bought it 3 weeks ago with 39,800. Randomly displays 'service theft deterrent system' and I cant start. Dash lights up etc, but cant start. Have had to use oem remote-start as a work-around, but that isnt working now either. The engine will start but as soon as i put the key in, turn to 'on', and put in gear, engine kills. Battery is original, but good. Reading 12.6v engine off, 14.1v running, and load test is good. It seems to happen more when stoping/starting over short periods, like starting 1st in morning fine, go to get gas, turn off 5 min, wont start. Get it startedz drive and stop at ATM. Turn it off 2 minz wont start. If it matters my Infotainment outside temp is never correct either - and i mean off by a lot. Any ideas or suggestions? Thanks guys! PS - did new sierras come with 2 keys AND fobs? Dealer gave me 1 key and fob, and 2nd key by itself. Said GMC only gave 1 fob (and 2 keys) to new purchases.
  9. Drl disable 2015 silverado

    I have a 2015 silverado from Canada I bought headlight covers and tail light covers for the truck not realizing that the lights stay on all the time while in drive is there a way to disable the drls while in gear.. doesn't look very good with lights on under the covers.. no drl relay that I could find
  10. GM/Chevrolets claimed tow rating doesn't add up when crunching the numbers between the 4.3 V6 3.42 model vs the 5.3 V8 3.08 model (2014-2018). Look at the last two columns in the below chart for torque (ft./lbs.) coming out the differential towards the wheels. (These numbers do NOT account for drive train loss, at the wheel ratio changes due to various tire sizes, and the engine torque was taken as published (383 for 5.3 and 303 for 4.3 V6). The ROWS are gears 1 (top) through 6 (bottom). The formula used was: Step 1) Transmission gear ratio multiplied by Rear end gear ratio = Final Drive Ratio. Step 2) Final Drive Ratio multiplied by engine torque = TORQUE coming out of the differential to the wheels. Torque coming out of the differential and to the wheels what gives a vehicle its POWER to pull and move weight. The 5.3 with 3.08 BEATS (MORE POWER) the 4.3 with 3.42 in EVERY GEAR I understand there is more to ratings for tow capacity than just pulling power, however the 5.3 and 4.3 share the same frame, suspension, 6 speed transmission, etc. which means the only variable between the two models is the engine. Since the 5.3 with the 3.08 rear end CLEARLY has MORE torque going to the wheels than the 4.3 with the 3.42 rear end how does Chevy/GMC claim that the V6 model can tow more? The only thing I can think of is MAYBE the 4.3 runs cooler than the 5.3 so the engine is capable of sustaining high RPMs for a longer period of time...
  11. So I have been looking around for a level kit I think I want to go with a 2inch level on the front. But I'm not too sure on what one to get? I have seen the rough country one for a reasonable price. I was also looking at motofab. Is there any others that I should consider? Also with a level kit void a factory warranty? Post some photos of your level lift! Or give me some input on things to be aware about.
  12. Hi I'm new here and really didn't find an answer to my question...so I just did an oil change on my 14 Sierra with the 5.3 and added the correct 8.5qts of oil. As I was doing the oil change the level was perfect...but I checked it again the next morning just to be safe and no matter what I did the oil level read pretty high as in where the dipstick starts to twist. I was on level ground and when I did the oil change I ran the engine for 30 seconds to fill the filter and it looked great until I checked it again. Is this something to worry about???
  13. Here's my new to me CPO 2016 Chevrolet Silverado 1500 5.3/8spd LTZ w/ LTZ Plus Package and Z71 Package. Silver Ice on Jet Black Here are pics the day I picked it up from Lone Star Chevrolet in Houston TX on Feb 28. Mods are going to be the usual and will be listed below Thanks for looking!
  14. Hi Guys I'm new to the site and new to GM trucks as well, my previous truck was a 2013 F-150 XLT with the 3.5 Ecoboost and 3.55 gears it was rated to tow 9,800lbs. I Just purchased a new 2015 Sierra SLT 4x4 with the 5.3 and 3.42 gears rated to tow 9,100lbs. Both of those numbers are significantly higher then I will be typically pulling and I am sure the Sierra is up to the task as the main things I towed with my F-150 was a 17ft fiberglass boat in the summer (approx 2500lbs dry) and an 18ft deck-over trailer with 4 snowmobiles in the winter (approx 4,800lbs) in the winter. I have not had a chance to tow with my new Sierra yet as I am still breaking it in but I thought I would try and start an thread before I do looking to you guys for some insight and opinions and I will definitely let you know my experience on the towing differences between the two trucks once I have a chance to compare. What I noticed with my F-150 was its very strong torque curve which allowed it to pull my trailers very easily, the transmission in tow/haul was also very good about picking a gear on the highway (usually 5th) and being able to hold it without hunting or lugging the engine. The downside as I am sure many have heard/experienced is the ecoboost is horribly inefficient when towing especially in the cold weather, for example when towing my sleds in the winter it typically returned anywhere from 8-10 US MPG (29-23 L/100 KM). My main concerns regarding the Sierra is that I notice GM has obviously tuned the transmission for maximum fuel economy as it is always looking to shift to 6th asap! I was wondering if when towing do you guys find putting it in tow/haul is enough to keep it from lugging the engine or gear hunting or do you tow using the manual mode? Also anyone towing similar weight trailers who might be able to advise on what sort of fuel mileage I might be able to expect would be greatly appreciated, thanks in advance!
  15. So I've had my truck now for 2-3 months and it is now sitting at 3295 miles and every now and then it shifts hard or sloppy but i can make it shift hard by flooring it which obviously happens when doing this but the weird part is not flooring it is when i let off the gas and when i come to a stop the downshifts are harsh. Now i know i could be breaking it in but even my father who used it for a week said it should be checked out and he is quite the Chevy enthusiast himself. Is there any known problems with the 6 speed in my truck? its a 2018 double cab lt z71 4x4 with the 5.3l. -edit: it also shifts hard when using manual mode or low whatever you like to call it just putting it out there.
  16. Wondering if these engines will be tune-able as usual? Currently have my 2500hd LBZ, but am I'm looking to get back into a half ton for 2019. Ideally would like a 6.2 again.. Only concern is issues with tuning them like the new L5Ps uncrackable ECM. Want either Armageddon twin turbos or a supercharger with a mild cam down the road. If they're not, looks like I'll stick with my old truck.
  17. Hey guys I’m new to the forum but I’ve been a long time subscriber since I bought my 14 Sierra new in feb 2014. So I’ve read lots of horror stories on the site and I thought I’d tell you guys about my experience. A few weeks ago over 5r holidays, my girlfriend and I were returning a uhaul after moving and she was following in my truck, she called to say that the check engine light was on and the truck had reduced power. We dropped off the uhaul and I hopped in and could tell it was misfiring and had a rough idle. I took it to my local mechanic and he told me cylinder 4 was misfiring and he tried a coil pack but that didn’t fix it, he did a compression test and it was holding compression but he told me this was gonna be a bigger problem. luckily I still had powertrain warranty so I contacted the dealership that I bought the truck from and they had me tow it there using gm roadside. So my first hats off to gm, the lady I had on the phone from roadside assistance asked her manager to waive the tow fee as I was having it towed to my home dealership that was > than the 50 miles that they cover for free. Once the truck made it to the dealership, it only took the. A couple of hours to figure out I had a failed lifter and broken rod for cylinder #4. Now I was freaking out because I’ve read horror stories on this site about having to argue with regional managers for warranty work this significant and I’ve heard dealerships arbitrarily saying work isn’t covered under warranty for whatever reason. Thankfully I can say my service advisor set me up with a rental the same day and reassured me that everything would be covered by gm. He did say parts were on backorder and it would take approx 2 weeks. Almost 2 weeks to the day, truck was ready to be picked up with 0 hassle the entire time. This is my 3rd truck with the 5.3 and the only time I’ve had a significant mechanical issue. The truck only had 85000 km (around 50k miles) sure I was PO’d that my truck was out of commission for 2 weeks but I was extremely thankful that gm stood behind their product and was able to fix the truck for me. The truck seems to run fine now but I don’t know if I will keep it as I don’t know if it will be the same or if the issue will reoccur. I do know that my next truck will definite be another Chevy or Sierra. I can’t wait to see the reveal of the new Chevy this weekend at Detroit! Jut thought I would post a positive warranty repair story and throw a kudos out to gm for making things right with me
  18. Hey Guys, I have a 2010 Chevrolet Tahoe PPV with a 5.3L LMG and a 6L80 Trans (MYC) looking to drop in a 6.2L L9H. As far as I understand it is a direct swap. Would I run in to any issues or codes as far as the L9H not having AFM/DOD? I plan on using the 5.3L PCM and having it re flashed to work with the 6.2 Or do I look for a L94 that has FlexFuel, VVT, AFM like the LMG does?
  19. I have noticed when I open the drivers door I here a sound like the fuel pump starting up for several seconds then shuts off. Is this normal? What is the reason for doing this?
  20. After getting back from a 5month deployment, my 2014 Silverado 5.3 2wd, cruise control speed decrease is now increasing the speed. The + acts normal but - is now also speed increase. The battery was disconnected this entire deployment. I’ve reset battery numerous times for hours trying to drain any capacitor I could. Any help or suggestions would be appreciated. It was in a cold environment. (Seattle WA)
  21. Hows it going, any help and advice is VERY much appreciated. 2000 Silverado 4.8 vortec 1500 4wd. I have been trying to figure this truck out for months, shakes at all rpms although certain rpms are worse than others(the missfire) I have replaced intake manifold gaskets, double and triple checked vaccum system for leaks doing smoke tests (no vaccum leaks), replaced pcv valve, thoroughly cleaned injectors, confirmed everything fuel wise is working properly, new fuel filter. Still shaking badly. The other day I had a great idea, I waited until it got dark outside and decided to run the engine and look under the hood. Sure enough, I noticed sparking (shorting out) happening on pretty much all of the coils. The sparking is COMPLETELY random and there is never a consistent spark, for example one moment coils for cyl# 2,5,1,7 will be sparking, the next moment they wont and others will, and sometimes they look like they arent sparking at all, Also may mention that the drivers side of the motor seems to be sparking more often but it does indeed happen on both sides. It seems to spark a little more frequently when you spike the throttle. All i have replaced in the ignition system is the spark plugs, and made no difference at all. All of the coils are producing a spark at the spark plug. I have checked the common grounds to each ignition coil (plug on the top of the coil) and they all were grounded. Truck has 240k miles. If someone could please help me I would really appreciate it I feel like im SO close to fixing this thing and is my only car right now and need to figure it out. Thanks
  22. New to this whole forum thing so let's just get down to business. I have a 2015 Silverado 1500 with the L83 5.3L currently I have an Edelbrock E-Force 2300 stage 1 supercharger and Borla atak cat back exhaust. I have been researching all over and for the right camshaft size for my application (1/4 mile/street) and haven't really gotten anywhere. what Camshafts are performing well in these SIDI engines with superchargers? I'm aware that I would need stronger valves, springs, and most likely rods, I've heard great things from Texas speed and Comp Cams but I am not partial to either. once I do the Camswap I will also be looking into a smaller pulley and new injectors which I will also need feedback for. I'm currently running the SCT tune that came with the kit from Edelbrock but I'm sure it will not be adequate once I put in the new cams, smaller pulley, and injectors. ANY INPUT WILL HELP!!!!
  23. Okay so I bought a new Silverado last year, the day I took it home I installed a number of things, one of those things being a wix "coolant" filter Part #33032. GM actually has a perfect quick disconnect on the fan shroud so I just unclipped that and slid the filter into place. Why? I've just always been curious on a brand new truck. Does it actually matter? I don't think so because the trucks don't have a coolant fed oil cooler that could clog like the corvettes do so I actually might recommend it to those guys who do. What I found interesting was once I opened the filter there was a ton of gunk of a muddy type consistency. I've included a few pictures keep in mind the truck only had 7500 miles on it or so when I took this filter off. I don't see this playing a huge role in the lifetime of a vehicle (which is why GM probably doesn't include one) but I'm sure the gunk would clog small radiator/engine passages over time (years) of course.
  24. Hello, I looked 2008 GMC Sierra 1500 that I was interested in purchasing with the 5.3L V8 has 174,000 miles. Truck runs rough at idle, rpms are fluctuating. Check engine light is on with codes P0300 and P0301. Can’t troubleshoot the problem. Coils, spark plugs, spark plug wires, new O2 sensors, new catalytic converters. Guy says that rockers all move so it isn’t Active Fuel Management lifters and he says 150 psi of compression across all 8 cylinders. Truck was at dealership, dealership says problem with cylinder numbers 1 and 8 the P0301 explains problem with cylinder 1 but why isn’t code P0308 being thrown? What else could be the problem?
  25. Just wanted to relay a story in case anyone runs into this issue. Well, a couple weeks ago I did a simple pan drop, filter change, and added 6 quarts of Amsoil Signature series fluid. The truck was shifting really smooth and running great for about 3-4 days. After that I noticed a shudder at 20-30 mphs. Nothing major and it felt like it was coming from the back of the truck, so I assumed it was the rear wheels needing balancing. After more driving of the truck I slowly realized the shudder was likely due to the torque converter. I had bought 3.5 gallons of amsoil fluid and had planned to disconnect the trans line and pump out old fluid and add new. I finally got around to doing that yesterday and drove the truck about 10 miles or so and have now noticed the shudder is pretty much gone. The fluid was extremely dirty but didn't smell burned and my truck is a 2014 with only 46k. For only 46k I felt like the fluid was way too dirty but I didn't feel the pan had an excess amount of metal shavings in it. I have never had a shudder develop after a simple fluid change but wanted to share this with anyone in case it happens. If the shudder doesn't completely go away I may end up (unfortunately) buy another gallon of fluid and exchange it out. However so far it seems like the shudder is gone or very minimal.
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