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Found 48 results

  1. Hey all I recently went to some 18x12 -24 moto metals with mt Baja Mtz tires and they are measuring out at around 32” from my stock wheels with 265s on my 2016 5.3 6sp cc 3.42gear Mpg went from 21 to 13 avg trans temp up from 188 to 194 constant on highway power feels like my old 4.8 now I got a hypertech 2.0 tuner but no help really I expected possibly a loss of 2-3mpg but this is a little much I had planned to go 6” with 35s but there’s no way now unless these Mickey Thompson’s are causing way to much rolling resistance has anyone else had this big of a lose with mud tires or offset rims ?
  2. Ok so I've installed the Airaid MIT, AEM dry high flow filter, and Borla muffler. Now I need a tune to bring all this together. I'd love to pay a custom shop to do this professionally, but unfortunately I can't find one near me, which is weird because I live in the freakin racing capitol of the world. I'm looking for a very basic tune. My primary concerns are MPG's, turn off V4, and account for the 33" tires I put on. If I can gain a bit of performance from this tune, awesome, but that is not my primary concern. Anyhow, I've seen a ton of tuners out there from the cheap "plug in and leave" type, to the full blown $500 tuners. So what is everyone's opinion on getting a tune? Is it really all the hype others make it out to be, is it worth it, and is it really necessary with the mods I've done? Will the cheap "plug in and leave" type suffice, or are they junk? Are the $500 tuners worth it, and if so, are they easy enough from a beginner to use (I'm a beginner but I'm also very tech savy)....OR, should I just keep looking for a pro shop to do it for me? Thanks fellas!
  3. John Goreham Contributing Writer, GM-Trucks.com 12-11-2018 Ford's media launch for the all-new 2019 Ranger is presently underway. One tidbit that Ford let out today is that the Ranger will have a 22 MPG Combined rating in 4X4 and 23 MPG combined in RWD versions. Those numbers are the same as the Colorado and Canyon Duramax diesels'. Normally, comparing a gasoline-powered vehicle to a similar one with a diesel engine is meaningless. Diesels are really good at two things; creating torque at low RPMs and having a high miles per gallon rating (of diesel fuel). The Ranger is a bit different. Like the new Chevy 2.7-Liter turbo gas engine, the Ranger's 2.3-liter "EcoBoost" turbocharged gasoline engine also develops outstanding torque at low RPMs. The Ranger is rated at 310 lb-ft of torque. Ford has not yet provided a curve for it and we will update our readers when they do. Expect a low RPM peak and a flat plateau over the entire normal operating speed range of the engine. Diesel is presently selling at 22% more per gallon than regular unleaded according to AAA's daily national average posting. It will be interesting to see how the Ranger pulls trailers. It may well have a similar pulling ability to the Duramax equipped midsize trucks from GM, but offer much quicker acceleration coupled with a lower cost for fuel.
  4. 2018 Silverado Z71 5.3L with 14K miles. DIC fuel average indicates 10.3% better fuel economy then actual MPG. 28 fill-ups and reset each time. Any way to calibrate meter? 1% variance maximum variance between each of 28 fill-ups. Thanks for any assistance. Truck is 100% stock including tires.
  5. I'm looking at a 2015 1500 with a 4.3, 3.42 gears. I would add a leveling kit with 33x12.5s. What should I be expecting for gas mileage? Would a 5.3 get better MPG with the lift/tires? What is your current tire/lift/engine/mpg? I tried the search feature but couldn't find a ton of what I was looking for.
  6. Just a quick question if anyone else has noticed this or had this problem. On my way home on the same highway I always take with the same fuel, load etc.. I noticed on the DIC that my mpg tracker was fluctuating a pretty decent amount. Normally it bounces between 1-2 MPGs at steady highway speed but tonight it had a 5-7 MPG fluctuation. I have a blackbear tune with v4 delete, Cai, oil catch can and Borla cat back exhaust. I didn't notice any surging or pulsation of the rpms gauge and there wasn't any wind at all pushing me around. Kind of confused what's going on here.. 2014 GMC Sierra 5.3L 4wd
  7. Here’s my 2015 Silverado 1500 LTZ 4x4. Got a 6 inch Trailmaster lift with 24 inch replicas and 37 inch rbps. Should I do a gear change? If so, what?
  8. Yesterday I had to run to Phoenix and back for work supplies. My company truck is a 2016 GMC Sierra 1500 long-wheel-base 2wd with 5.3L V8 (former Uhaul truck). I used cruise control, I meticulously went the speed limit, and I used the air conditioning and stereo during the trip. More than half of the trip I was hauling over 1500 lbs in the bed. By the time I returned the dash was telling me about 25 mpg for the round trip. Manual calculations at the pump said 23.49 mpg. In my opinion that's very good. Here's the video:
  9. Hey guys, I was curious to hear what you all have done on your truck for better gas mileage and what you think the best grade of gas is to use for gas mileage. I have a 2017 Silverado custom and get about 19 average.
  10. Hi guys, I have a 2003 Silverado 4x4 with a 4.8 and 3.73s and auto trans. My catalytic converters were very plugged up and I ended up cutting them open, removing all of the material inside, and welding them back together. The truck has run much better since doing this. The problem is, since doing this i have been getting about 13.8-14 mpg with it. This is driving the same route i had been getting 16-17mpg previously. I am thinking that this has something to do with the fact that i left the o2 sensors in place. I am looking for a relatively inexpensive fix/ improvement for this, because this is just a rusted out daily driver truck with 160k that I don't really want to put a ton of money into. I wanted to see if anyone had any experience with this before I tried a few of my ideas. Any advice would be appreciated. Also, i am aware that this is technically illegal, but there are no emissions tests in my state, so running no cats is not a huge issue for me. thanks
  11. I couldn’t really find any good information out there on MPG impacts from a roof mounted light bar. There was a bunch of guesses on random forums but I didn’t really see any legit real world testing so I put a video together to share the results.
  12. John Goreham Contributing Writer, GM-Trucks.com 1-29-2018 Throughout Chevrolet’s launch event and in its most recently released vehicle specifications, Chevy details a long list of fuel-saving technologies and changes to the new 2019 Silverado. We dug into the data and pulled out just the factors that Chevy lists that will save fuel in the new Silverado. Here’s what we found: Aerodynamics Chevrolet reduced aerodynamic drag on the new 2019 Silverado by 7%. The Silverado has front functional air curtains, like those introduced on the sixth-generation Camaro, that reduce aerodynamic drag by routing air around the front wheel wells. The rear edge of the cab now has a spoiler that aims the air flowing over the top of the truck at the tailgate lip, reducing wind drag from the bed. Drivetrain The 2019 Silverado’s new 5.3L and 6.2L V-8s will have an industry-first Dynamic Fuel Management system that actively shuts off any number of cylinders, in a variety of combinations, depending on immediate needs to optimize fuel economy. The engines will be coupled to a new Hydra-Matic 10-speed automatic transmission. Chevy is also adding start/stop technology to improve fuel economy Shortly after launch, Chevy plans a new Duramax 3.0L inline-six turbo-diesel for the Silverado. The intent is to offer a fuel-efficient engine for towing and good low-end torque, that will also stretch the Silverado’s MPG rating. Chassis, Body, Swing Panels A much greater emphasis on high strength steel, as well as other lightweight materials, means the new 2019 Silverado is 450 pounds lighter than the outgoing truck (crew cab V8 models). High strength steel makes the frame stronger, and stiffer, and also lighter. The cargo bed is also a new lighter, stronger steel. Composite springs in the rear of the Silverado saved 24 pounds. Aluminum suspension components, door skins, hood and tailgate all reduce weight. Changes to the body alone saved 88 pounds.
  13. Recently (started three months ago) - I have noticed a sudden loss of fuel economy in my truck. I drive 500 miles a week ALL highway. I have gone through 2 winters on it (bought with 20k miles and now has 70k miles). In september 2016 - I noticed my highway milage dropping. I used to get 21-22mpg on my 170 mile commute (all highway 70mph). It performed like this since I bought. I started seeing 17-18mpg highway, and now I get no better than 15mpg highway. My average over 50k miles driving was 20mpg My average over last 3 months and 4000 miles is 14.5mpg While on the freeway at 70mpg - it gets 14-15mpg. This is very frustrating because for past two months I have been troubleshooting with my dealership. I have extended bumper to bumper and full drivetrain warranty - none of which covers this issue!!! They can't tell me whats wrong with it and seem unable to diagnose the cause. We have tried the following: -Put different stock tires on the vehicle and drove for two weeks, no difference -Put a MAF sensor from a different (new) silverado and drove for two weeks - no difference -Tested for fuel consuption - no excessive use of oil (very little to none being burnt) -Oil changes - no difference -New stock airfilter and clean MAF sensor - no difference -I use only top tier gas and oil -No tire wear visible -Fuel trims appear to be good -No diagnostic codes showing up I know there are many variables for fuel economy, but we have look at everything we could and have ruled out most everything. The dealership is of no help and says GM has no documention on this issue elsewhere. I have talked with many auto professionals and they all say this sounds bizarre or offer up that I have a crap engine. Regardless I have full bumper to bumper/drive train warranty and its of no use!!!! Does anyone offer up what I should take for next steps? I mean, I used to own a 1971 Chevy C10 3 on the tree, that got better mpg than my 2014 Silverado. Its rather unbelievable Where do I go? Who can properly diagnose the issue? Any help appreciated! Thank you! -Darren
  14. I've read articles about best ways to drive to consume less gas including some threads on this forum. My question is: What is the number one thing you noticed you do that has positively impacted your fuel consumption on these 2014+ trucks? The photo below was posted on another blog which astounded me. Yeah it's only the last 25 miles but unless I was driving downhill for 23 of them, I don't think I could come near this. The only information about the photo is that it's a current generation Silverado and the owner was 'hypermiling' with no specifics listed. Needless to say it sparked my interest on the topic.
  15. 90000 MPG

    From the album Truck Stuff

  16. I've had the truck for a few weeks now and this past fuel tank has yeilded the best mpg and range to date. Previously I had only been averaging around 17.5mpg doing a mix of city and highway. However this past week yielded a very nice 20mpg. Now I will say this, this is the first time I've filled up on 91 octane. Before this week I'd only filled up on 87. Now, before I get yelled at, I understand how octane numbers work. If you tried to argue that your 2001 Honda Civic ran better on 91 vs 87 I would laugh at you. My question is, do these trucks adjust timing based the type of fuel it detects? My understanding is that it adjusts timing and flow levels based on a sensor which detects ethanol quantity in the fuel. Would this sensor also detect octane levels? So far this is my lifetime average mpg. I think it should be a bit higher but I tow frequently, and the one time I filled up on e85 really brought my average down. This is my previous 50 mile average and best for this fuel tank.
  17. Hello All, I recently purchased a 2016 Chevy 1500 LT, with the 5.3 (AFM v4/v8). I'm looking to lift the truck sometime after next February when my wife gives birth to our second kiddo (don't want to have a lifted truck with a pregnant wife getting in and out). I'm planning on having SORS put on a 6" ProComp lift, 35" A/T tire, and wheel it (probably 18s). I'm keeping the factory step bar, and have a tool box with an open bed (no tonneau). I'm looking for the best MPG possible, both before and after the lift and was wondering if anyone had any advice? I'm thinking: Flowmaster 50 series Airaid CAI SCT Programmer Are there any other things that I can, or any better parts to use for a big MPG boost? My driving is 50/50 city/hwy. Thanks!
  18. For the LTZ 5.3 vs 6.2...looking at the 4dr 6.5bed...the mpg it shows on the window seems a little low for using AFM...what are your actual numbers you get? We'll say without towing, and with if ya got it...say you just bought it and went on the freeway for a few hundred miles and AFM was on, theres no way to get 18-20mpg, is there?
  19. 50 mile average

    From the album 2016 Silverado

  20. I have a 2015 5.3 SLE with 6000 no issues so far but last time i was on the freeway the truck struggled with dropping into V4 mode. around 70mph it would drop in and out of V4 to V8 when in cruise control. Has anyone else had these issues? I also have the factory borla and the MIT tube would this cause this issue?
  21. I know I'm not driving a Prius but I would like to get something for better fuel mileage and I have it lifted (not helping) but I was hoping someone knew a way to get better than 13mpg I have the 5.3 6speed auto trans any one know? Dual exhaust and cold air intake added .4 mpg
  22. I have (2) NEW Diablo intune i2 Tuner for 2007-2016 Silverado 5.3L for sale. Item is new in box and never been opened and was purchased for gifts that I no longer need. Paid over $400 each with tax and shipping but willing to part for less. Email me at [email protected] if interested in getting your hands on one of these babies! THANKS
  23. John Goreham Contributing Writer, GM-Trucks.com 5/16/2016 Sixty thousand model year 2016 Chevy Traverse, GMC Acadia, and Buick Enclave crossovers are now off the market at GM dealers in the U.S. because the Monroney window stickers show the wrong MPG. Of course, the MPG is too high. Funny how the MPG claims are never accidentally low. GM admits the stickers are incorrect and blames a data transfer mistake. The Detroit Free Press reports that GM spokesman Tom Wilkinson said in an e-mail: "GM discovered an inadvertent error which affected the fuel economy information on the fuel economy labels on the 2016 model-year Acadia, Enclave and Traverse. The error caused the EPA estimated fuel economy to be listed on the window label as 1 to 2 m.p.g. more than it should have been. GM is stopping sale of the affected models until a corrected label is printed and affixed." This does not seem to be a case where GM certified the vehicles itself and was then nabbed for cheating by EPA. GM is planning to print out and affix new stickers ASAP.
  24. Hello all, I am the proud new owner of a 2016 Crimson Red 1500 All Terrain Premium 5.3 (8 speed). This is not only my first "New" vehicle, but it is also my first full size pickup. The truck only has 500 miles at this times, and it is my daily driver here in the Northeast. Thus far I am pleased with the truck, steering is tight, brakes well, the comfort level is great, technology is impressive, and the styling awesome. My only criticisms thus far may be due to my lack of familiarity with GMC trucks, and even my lack of experience with owning a brand new vehicle. First off, and im sure I am going to get beet up over this, but the fuel "economy" is pretty bad. I understand it is a truck and it is new, however with very conservative highway driving and limited city, I am averaging 14-15 mpg (93 octane, New Jersey winter). This is far below advertised or even what most people get with there older trucks. Another thing I noticed is that it lacks throttle response at essentially any speed unless the throttle is mashed. It seems like the transmission is a bit lost and cant choose which of the 8 gears it should be in. At highway speeds, there is really no part throttle acceleration, you really have to get on it for the trans to downshift and make the truck move. This is also my first experience with "cylinder killing" which I am also unsure of. It seems that I only move down to V4 when there is practically no throttle input or if I am traveling downhill. The instant there is a throttle input I am back in V8 and down to 9 mpg to accelerate even on the highway. I assume (hope) that all of these things will sort themselves out as the truck is new, as I have heard there is a period when the truck is in "learn mode". I am unsure if this is correct or how long is stays in the "mode", and more importantly how I should be driving in this "mode". Much of my driving is highway cruise control set, which doesnt really provide much "learning variables". Any suggestions or comments from those who have owned newer generation Sierras would be appreciated.
  25. John Goreham Contributing Writer, GM-Trucks.com 11/09/2015 It's official. Chevy and GMC announced today that the Duramax diesel Colorado and Canyon models will be the most fuel-efficient pickup trucks in the U.S. market. Without further ado, here are the numbers, and they apply to both trucks. These numbers are per the EPA, which scrutinized the trucks for emissions compliance before granting approval. 4WD Colorado and Canyon Models: 20 MPG City / 29 MPG Highway / 23 MPG combined 2WD Canyon and Colorado Models: 22 MPG City / 31 MPG Highway / 25 MPG combined In case you were wondering how these stack up to the Ram 1500, the 2WD Ram has a rating of 20 MPH City / 28 MPG Highway / 23 Combined. A V6 gasoline-powered Canyon or Colorado with 4WD has a 17 MPG City / 24 MPG Highway / 20 MPG Combined Rating. The efficiency advantages to the diesel are real. Even when adjusted for a higher average price for diesel the Duramax will likely still be ahead ion terms of fuel economy (fuel cost per mile) as well. Range with the dual tanks in the trucks is also amazing. GM says the trucks can go 651 miles (maximum) without refueling. The cost adder for the Duramax over a V6 truck is about $3,730. Obviously that buys a lot of regular unleaded. Luckily, the Duramax has advantages beyond just fuel efficiency. Towing being the most notable. One aspect of which is smart diesel exhaust braking. This type of braking enhances vehicle control and reduces brake wear by reducing the need for breaking on downgrades according to GM. Duncan Aldred, vice president of GMC Sales and Marketing commented on the Duramax trucks, saying, “GMC's Canyon is designed for those who want a smart-sized premium pickup that is quiet, capable and efficient and the new Duramax diesel engine gives customers another choice for handling heavier work and recreational needs – while doing it efficiently. It’s the very definition of GMC’s professional grade ethos.” Sandor Piszar, director of Chevrolet Truck Marketing offered up his two-cents, saying, “The Colorado Duramax diesel is in a league of its own. Colorado’s gas models already led the segment in fuel efficiency, and the new diesel – which no other non-GM competitor offers on a midsize truck – gives customers even greater freedom to go where they want with fewer fill-ups.” The Canyon we drove recently was loaded and had an MSRP of $45K. Expect shipments to dealers to begin any day.

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