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  1. Next-Generation GM Trucks (2027+)

    1. 2027+ Silverado 1500 & Sierra 1500

      The definitive source for the next-generation 2027 Chevrolet Silverado and GMC Sierra. Breaking news, spy photos, release dates, and technical discussion on the redesigned platform.

      432
      posts
    2. Gen VI Small Block V8 (5.7L & 6.6L)

      The next chapter of GM performance. Discussion on the 5.7L and 6.6L Gen 6 Small Block V8 displacements for the 2027 Chevrolet Silverado and 2027 GMC Sierra.  Talk specs, technology, and the $854M investment in the future of the V8.

      44
      posts
    3. 2.7L TurboMax Engine

      The ultimate resource for the 2027+ GM 2.7L TurboMax featured on the Chevrolet Silverado and GMC Sierra. Connect with other owners to discuss the enhanced power delivery, towing capability, and the brand-new 10-speed transmission.

      6
      posts
    4. ZR2, Trail Boss, AT4, AT4X & AEV Off-Road

      Discuss the 2027+ Silverado ZR2, Trail Boss, Sierra AT4 & AT4X. Get technical info on GM's factory 2-inch lift, 34" and 35" MT tires, Multimatic DSSV dampers, and AEV Bison editions.

      • No posts here yet
    5. 3.0L Duramax Turbo-Diesel

      The premier community for the 2027+ Silverado and Sierra Duramax 3.0L Turbo-Diesel. Explore technical details, towing numbers, and maintenance for this proven, segment-exclusive powertrain.

      • No posts here yet
  2. GM Electric Vehicles (Ultium)

    1. Silverado EV & Sierra EV

      The full-size electric trucks. Discussion for the Chevrolet Silverado EV (WT, RST, Trail Boss) and GMC Sierra EV (Denali, AT4, Elevation). Covers range, towing, and charging.

      68
      posts
    2. GMC HUMMER EV

      The world's first supertruck. Discussion for the Hummer EV Pickup (SUT) and SUV. Off-road modes, CrabWalk, and mods.

      320
      posts
    3. Equinox EV, Blazer EV & Cadillac Lyriq

      The technical resource for GM's electric crossovers. Discussion on the Chevy Equinox EV, Blazer EV, Cadillac Lyriq, and Optiq. Share software tips, range tests, and charging experiences.

      • No posts here yet
  3. 2019+ Full-Size Trucks & SUVs (T1XX Platform)

    1. 2019-2026 Silverado 1500 & Sierra 1500

      The main discussion hub for the T1XX platform. Daily driving, new orders, pricing, and news for the 2019+ half-ton trucks. Includes 2022+ refresh. 

       

       

      205.3k
      posts
    2. 2020-2026 Silverado HD & Sierra HD

      The heavy-duty headquarters. Discussion for the 2500HD and 3500HD. Towing, payload, ordering, and daily driving.

       

       

      53k
      posts
    3. 2021-2026 Tahoe, Suburban, Yukon & Escalade

      The full-size SUV headquarters. Discussion for the Chevy Tahoe/Suburban, GMC Yukon/XL, and Cadillac Escalade. Covers the 3.0L Duramax, 6.2L V8, Air Ride suspension, and IRS upgrades.

       

      1.6k
      posts
  4. Chevy Colorado & GMC Canyon Forums

    1. 2023+ Colorado & Canyon (3rd Gen)

      Discussion, news, and technical help for the 2023+ Chevy Colorado and GMC Canyon. Covers the 2.7L TurboMax engine, ZR2, AT4X, and all 3rd Gen updates

      148
      posts
    2. 2015-2022 Colorado & Canyon (2nd Gen)

      The central hub for the 2nd Generation twins. Discussion, news, and ownership experiences for the 2015-2022 Chevy Colorado and GMC Canyon.

      3.6k
      posts
    3. 2004-2012 Colorado & Canyon (1st Gen)

      The original GMT355 platform. Technical discussion and mods for the 2004-2012 Chevy Colorado, GMC Canyon, and Isuzu i-Series. Also covers the Hummer H3 & H3T.

      449
      posts
  5. 2014-2019 Full-Size Trucks & SUVs (K2XX Platform)

    1. 2014-2018 Silverado 1500 & Sierra 1500

      The main discussion hub for the half-ton K2XX. Includes the 2019 Silverado LD and Sierra Limited legacy models 

      621.4k
      posts
    2. 2015-2019 Silverado HD, Sierra HD & Medium Duty

      The heavy haulers. Discussion for the 2500HD / 3500HD and the 4500HD / 5500HD / 6500HD chassis cabs.

      42.6k
      posts
    3. 2015-2020 Tahoe, Suburban, Yukon & Escalade

      The K2XX SUV family. Discussion for the Tahoe/Suburban, Yukon/XL, and Cadillac Escalade. Covers Magnetic Ride Control and Air Leveling.

      13.3k
      posts
  6. 1999-2013 Silverado & Sierra (GMT800 & GMT900)

    1. 1999-2013 Silverado 1500 & Sierra 1500

      The daily drivers. Discussion for the half-ton GMT800 and GMT900 trucks. Troubleshooting 4WD, ABS modules, and rocker panel rust


       

      139.7k
      posts
    2. 2000-2014 Silverado HD & Sierra HD

      The workhorses. Discussion for the 2500HD and 3500HD heavy-duty trucks. Covers the 2014 HD transition year.

      29.3k
      posts
  7. GM Crossovers & SUVs

    1. 2025+ Chevy Equinox & GMC Terrain

      The all-new generation. Discussion for the 2025 Equinox (LT, RS, Activ) and 2025 Terrain (Elevation, AT4, Denali). Focus on the new rugged styling and Google Built-In technology.

      9
      posts
    2. 2024+ Traverse, Acadia & Enclave

      The new generation of 3-row haulers. Discussion for the 2024+ Chevy Traverse (Z71/RS), GMC Acadia (AT4/Denali), and the all-new Buick Enclave. Tech talk for the 2.5L Turbo-4 and Super Cruise.

      11
      posts
    3. Classic Equinox & Terrain (2005-2024)

      Discussion and technical help for previous generations of the Equinox and Terrain.

      1
      post
    4. Traverse, Acadia, Blazer & Enclave (Pre 2024)

      The mid-size and 3-row headquarters. Technical discussion and news for the 2023 and older Chevy Traverse, Blazer, GMC Acadia, Buick Enclave, and Cadillac XT5/XT6.

      515
      posts
  8. Classic Chevrolet & GMC Pickup Truck Forums

    1. Chevrolet Express & GMC Savana

      All topics related to Chevrolet and GMC's popular full-size van line.

      389
      posts
    2. 1988-1999 Chevrolet & GMC C/K GMT400 Platform

      Like a rock. The classic 90's pickup truck. General and technical discussion for 1988 through 1999 Chevrolet and GMC pickup trucks. Parts wanted and for sale encouraged.

      13.9k
      posts
    3. 1980-2009 Chevrolet Kodiak and GMC Topkick

      Discussion for the medium-duty commercial Kodiak and Topkick.

      225
      posts
    4. 1973-1987 Chevrolet & GMC Square Body / Rounded Line Pickups

      General and technical discussion for 1973 through 1987 Chevrolet and GMC pickup trucks. These years were otherwise known as "square body" pickups, although GM officially called them "rounded line" designs. Parts wanted and for sale encouraged.

      1.5k
      posts
    5. 1967-1972 Chevrolet & GMC Glamour / Action Line Pickups

      The transition from work transportation to personal vehicle. General and technical discussion for 1967 through 1972 Chevrolet and GMC pickup trucks. Parts wanted and for sale encouraged.

      320
      posts
    6. 1960-1966 Chevrolet C/K/Apache & GMC 1000-3000 Pickups

      The beginning of the modern age of the pickup truck. General and technical discussion for 1960 through 1966 Chevrolet and GMC pickup trucks. Parts wanted and for sale encouraged.

      124
      posts
    7. 1982-2005 Chevrolet S-10/Blazer & GMC S15/Sonoma/Jimmy

      1982-2004 Chevrolet S-10 & GMC Sonoma, 1983-2005 Blazer & Jimmy

      1.6k
      posts
    8. 1969-1994 Chevrolet K5 Blazer & GMC Fullsize Jimmy

      The smallest full-size SUV in the history of Chevrolet and GMC. The original two-door station wagon. Discussion for the classic 1969 through 1994 K5 Blazer and fullsize Jimmy.

      169
      posts
  9. Member Builds & Introductions

    1. Member Build Threads

      The transformation from stock to custom. Document your build, modification by modification. One thread per truck.

      20.4k
      posts
    2. New Member Introductions

      Are you a new member? Maybe a member who's never posted anything before? It's alright! Come on in, start a new thread, and introduce yourself.

      24.8k
      posts
  10. Technical & Advanced

    1. Ask A GM Technician

      Stumped? Post your question here for GM Master Techs. Serious inquiries only. Please include your VIN and codes. 

      29.8k
      posts
    2. Towing, Hauling & Hitches

      Payloads, 5th wheels, and weight distribution. Ensure your truck is rigged right to pull the load.
      8.4k
      posts
    3. Audio, Electronics & Software

      The digital dashboard. Discussion on Google Built-In, Apple CarPlay, Android Auto, OnStar, and aftermarket sound systems.

      12.3k
      posts
    4. Tires, Wheels & TPMS

      Fitment guides and rubber reviews. KO2 vs. Wildpeak? Chrome vs. Black? Discuss universal tire and wheel topics here.

      16.1k
      posts
    5. Maintenance, Oils/Fluids, Detailing & Rust Prevention

      From the engine bay to the paint booth. Discuss oil analysis, fluid intervals, ceramic coatings, car wash techniques, and fighting rust. Keep your truck running strong and looking showroom fresh.

      20.3k
      posts
    6. Advanced Drivetrain, Suspension & Tuning

      Deep dives into mechanical theory. Gear swaps, transmission rebuilding, solid axle swaps (SAS), and HP Tuners / ECU calibration.

      16.2k
      posts
    7. DIY Guides & Reference Library

      Installations, Maintenance, and Repairs.

      2k
      posts
    8. Article & Review Archive (Pre-2019)

      A legacy collection of GM-Trucks.com original news, road tests, and product reviews published prior to 2019.

      14.6k
      posts
  11. Marketplace & Purchasing Advice

    1. Classifieds (Buy/Sell/Trade)

      The trading post. Buy and sell trucks, parts, and accessories. Please use caution and follow listing rules.

      55.4k
      posts
    2. Dealerships, Pricing & Orders

      Getting a good deal? Discussion on OTD pricing, interest rates, dealer markups, and order tracking.

      4k
      posts
    3. Vendor & Product Reviews

      The good, the bad, and the ugly. Reviews of aftermarket parts and experiences with forum vendors.

      1.3k
      posts
  12. The Lounge & Lifestyle

    1. The Off-Topic Bar

      Sports, news, jokes, and life. If it doesn't fit anywhere else, it goes here. (Keep it civil).

      93.9k
      posts
    2. Future GM News & Rumors

      General industry news, spy shots of non-truck GM vehicles, and rumors about what's coming next.

      11k
      posts
    3. Racing, Strip, & Track

      Track talk, racing strategies, super-performance parts, and techniques.

      1.5k
      posts
    4. Garage, Shop & Tools

      The place for projects. Snow plowing, landscaping, tools, garage heating, and home improvement.

      3.4k
      posts
    5. Hobbies, Tech & Outdoors

      Hunting, fishing, 3D printing, and photography. The place for your other passions.

      11.6k
      posts
    6. General Motors Product and Industry News   (21,486 visits to this link)

    7. Meetups, Events, & Gatherings

      Connect with other GM-Trucks.com members around the US or around the world.

      3.2k
      posts
  • Latest Articles

  • Posts

    • I have changed oil and filter for years by starting a cold engine to warm oil up, let it run 5-10 minutes depending on temperature. Drain until it starts dripping, refill with quantity from owners manual or get it close.   
    • I changed the factory fill oil in the rear diff of my truck for the first time today and the miles is close to 9000 on the truck. There was a lot of fines on the magnet, a very thick layer but working it through my fingers it all felt like mush and as most know it appears like graphite, so no surprise chunks anyway. Certainly was time to do it from my thinking and could have been done sooner but the oil didn't look awful but sure wasn't new looking and never expected it to either. I did use some solvent to help me clean out the bottom area of the axle housing, just get any other stuff settled at the bottom washed and wiped out of the housing for the bit of effort it takes. I used Amsoil Severe Gear 75W90 in the easy packs to try out what they are like and I used up 4 packs and didn't spill much at all in the process but did take all four of the packs and go to the work bench and emptied them into a measuring container and there certainly was some in them that added up to something, then poured that into one of the easy packs and squirted in what I could get out of it. I would say the level is within 1/8th of an inch of being level with the threads at the fill plug so just the perfect amount. Once again, more than what GM says the fill volume is but computes with what others are adding to their rear diffs as well. 
    • So speaking of oil consumption with my L8T as I just changed the oil yesterday and made the switch over to Amsoil SS 0W-40 from the Mobil 1  5W-30 Truck and SUV I just dropped out. 2900 miles on that oil as well as  68 hours on that oil ( so used to equipment with an hour meter and that becomes valuable information to compare with others as well ). Once again the oil use was so very little, I am going to say it dropped under 1/16 of an inch on the dipstick. No towing was done and this interval was from early spring until now.    One interesting item to note is that going by the 5 quart jugs I was using before from Mobil, it was showing that I was putting in 8 US quarts to bring it to full if not slightly over the full mark according to their jug markings. Granted I did allow more drain time this time and in part because the engine oil was only lukewarm as I started it and let it idle and not for long enough to get the oil itself hot ( the engine was up to operating temp ). The oil in that state just seemed to take forever for it to drip out but not only at the drain plug but at the oil filter housing as well, perhaps I had never quite gotten all the oil out before and I could have still waited longer but as it was I waited well over 3 hours. I think next time if I have the time I will do an experiment by dropping the oil and lets say leave the pan under it for 15 minutes, then switch to another pail and let it drip out overnight and measure how much more oil comes out. So this time and yes I ended up getting it just over the full mark as I was experimenting with trying to get the level to the add mark after I had run it and then waited some and then added a bit and waited for a certain amount of time for it to settle to the add mark. I very well may not have waited long enough for that experiment but I got to the add mark, then dumped in a full quart and waited some and checked and then waited some more and it crept up more ... and then finally oops, it was slightly over full some hours later when it really had settled all it would. I find this engine sure takes time for the last bit of oil that gets poured in to finally make its way into the crank case. I can only guess at how much too much I added as per maybe a 1/10th of a quart. I had poured in 8.5 quarts going by the quart containers as per 8 quarts and 16 us ounces. I was shocked at how much this was off compared to the prior oil changes and if those larger jugs and they are not marked accurately enough or they contain slightly more than what they say, or the drain time factor made that much of a difference. But I know on this forum there have been others who have said they have put well over 8 quarts in their L8T and now I have also going by the Amsoil true quart containers. Its a confusing convoluted mess up here in Canada with some oil manufactures packaging is in true US quarts, some is also in true US quarts containers on an even number of quarts but also marked in liters which becomes the odd ball volume of a fractional amount of liters. Then there is the Liters only containers, no US markings as its a true metric container and only measured in Liters to an even number of Liters. But remember we used to have Imperial Gallons and Imperial quarts as well !. 
    • Holy smokes. Clearly not a deal on that truck. I just mean in general, matte or painted trim is becoming more normative than chrome, but I know the Black Optics packages on various vehicles are being sold as uplevel trims. They look really good, but sheesh. It's just paint and plastic.
    • I Wouldn't Know Where to Begin    Oh I know where I would begin but I'm just one of over eight billion people on this rock. Eight billion versions of where the goal post is. How large it should be. How far to kick from. What ball is the right ball. Elevation. Age.....are you getting the point? It isn't about disagreeing with one individual. It's about agreeing only with one individual. One's self.   Agreement comes when multiple people hold the same point already. THAT is the goal of an education. Building the Social Contract. That thing that allows us to all read this sentence. We've agreed on the alphabet and how to arrange those letters into words we agree upon whose meanings hold true for everyone entering into that contract. Those words arranged into a sentence form an idea and several sentences strung together in a paragraph convey an argument for or against or inform the reader of a state, condition or perhaps reveal a things nature. Paint a word picture. Make oneself known.    This contract is not limited to words although they are often explained by words. Things like numbers and their usefulness. Physics, Chemistry, Medicine, Music, Art and so on.    The frequency of middle C (C4) is 261.63 Hz is a first principle. We build on that to make music we all can enjoy even if we all can not compose or play. You don't have to master it to make it enjoyable and useful.    So why is the Beginning so difficult? Why is agreement so elusive?   Everyone "Signs" the contract (when receiving that education in obtaining it)  but fewer and fewer in this world have any intention of living by that contract. They find exploiting that contract more advantageous. Disruption. With intent. Without intent. In Ignorance. In your face. With a double dog dare you. With a hold my beer. In resistance to that contract and in spite how it looks on us. It permeates the very air we breath.    In this way the contract is subject to advantage. Abide by it when it serves you, disregard it when it doesn't. Unpredictable and self-serving. Corrosive.....Toxic........   It says a lot about a persons character to disregard the contract, the truth, first principles. None of it good.        ********************************************************   https://medicine.yale.edu/news-article/character-vs-personality-who-we-are-and-who-we-aspire-to-be/   Just an interesting article.   
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