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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.

      319
      posts

    2. Gen VI Small Block V8 (5.7L & 6.6L/6.7L Rumors)

      The next chapter of GM performance. Discussion on the rumored 5.7L and 6.6L/6.7L Gen 6 Small Block V8 displacements. Will we see the return of the 350? Talk specs, hybrid-assist technology, and the $854M investment in the future of the V8.

      44
      posts

  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. 

       

       

      205.2k
      posts

    2. 2020-2026 Silverado HD & Sierra HD

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

       

       

      52.8k
      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

      146
      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 

      621.3k
      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.

      8
      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.

      10
      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.

      514
      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.

      122
      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).

      93.8k
      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. The GM-Trucks.com Garage - Vehicle Testing & Product Reviews   (18,721 visits to this link)

    7. General Motors Product and Industry News   (21,446 visits to this link)

    8. Meetups, Events, & Gatherings

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

      3.2k
      posts

  • Latest Articles

  • Posts

    • newdude
      Transmission Woes :-(

      By newdude · Posted

      You need a better code reader/scanner.  You are missing codes.  Did the dealer give you a copy of the SAVI scan from that visit?     If the fluid hasn't been changed, change it.  Shudder will likely go away.  
    • newdude
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By newdude · Posted

      TLDR to my other post...   Hard. Pass.  Too many what ifs.     Are you set on a 3.0 Duramax?  Have you considered anything not GM just in case?  If you don't have to have a pickup, lots of other options for $27,000 out there.   
    • newdude
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By newdude · Posted

      I see some red flags.   - No mention in the Carfax if the oil pump belt was changed.  LM2s had a 150,000mi service interval, and its got 164,245mi on it.  So right out the gate it needs about $3000-3500 for that to be done before driving it another 150,000mi.  Belt is at the rear of the engine.     - If something happens to the transmission valve body, the special coverage is expired by mileage.  That will likely be an out of pocket expense, with zero or near zero GM participation if something happened even though its in by time.   - 2020 LM2s seem to need timing chains after 80,000mi at some point.  They fixed this end of 2020/starting 2021 model year engines.  They will usually set a P0016 I think?  There is another $8000-10,000 if it needs a chain.  The main chain is at the back, secondary at the front so the pump belt would be done at the same time if it needed chains.     - Long oil change intervals.  7,000-8,000mi on average, probably close to 0% or perhaps to or beyond 0% on the OLM.  Lots of them not at the dealer which makes me wonder how much of the oil ran through that truck was the proper Dexos D rated 0w20 oil and not just gas engine 0w20, which is not the same at all.     - Long fuel filter changes, again likely taking the fuel filter life to 0% or more.  First one went 28,603, second was done 43,094 miles later at 71,697, from there another 46,452mi to 118,149mi, and then the most recent one 37,026mi later at 155,175mi.  So counting its original fuel filter, its had only 4 fuel filters on it.  No bueno IMO.         Good news?    - It has had only two warranty trips to the dealer.  The first free service (end of December 2020 on the Carfax), and the transmission reprogram recall (end of August 2025 on the Carfax).     - Truck did a LOT of moving, so that might explain the lack of emissions related repairs like bad NOX sensors, bad exhaust temp sensors, bad glow plugs, etc.         The "emissions system checked" could just be how something was flagged for Carfax.  GM dealers have to do SAVI reports for warranty repair orders so they scan the truck.  So its possible that is there for that?  
    • cherryred21duramax
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By cherryred21duramax · Posted

      Thank you, @Z45!   NOTE - No all repair shop/Dealers reports to Carfax   That is my main concern.  The CARFAX looks way too clean for a 6 year old anything with 164,245 miles.  Even something known for reliability (like many Toyotas) typically has a lot more replaced, like a Nav screen, interior trim, shock/strut, or brake pads.  And surely the last set of tires (installed at ~58k miles) would be bald unless those were all highway miles.   I'm tempted to pay a local dealer to look up the VIN, but am not sure if that will be worthwhile.  Last time I did this, it was 100% useless, and I felt scammed - they noted the bumper was replaced years ago and that's it.  A 5-year old could spot the accident damage, even though nothing was on the CARFAX.   After giving the dealer a call, the truck may have a hard shift, but they have to verify with their mechanic if that's even a concern.  And I've test driven about a dozen of these now, many near Chicago, and half the trucks shift hard/odd at all throttle positions.  The ones with aftermarket lifts/larger tires shift terrible, and 3 stock trucks shifted so violently I thought the transmission valve body was going out.   At this point I'm conflicted, as I need a vehicle, and am coming up short locally.  Northern trucks in this price range tend to have either multiple owners, a lot of mods (lifts/oversized tires without re-gearing), and are generally in rougher shape.   If this truck showed up in your neighborhood for $27k and you had to purchase it sight-unseen, with the possibility of needing a 10L80 rebuild, torque converter, or rear end - would you do it?  I'm convinced most of the 10L80 trucks I test drove are broken, they can't all shift so bad, with massive flares/slipping/lurching and mis-matched downshifts like a teen driver learning stick.
    • Griffin Donovan
      2027 GMC Sierra Spot Shots + Undisguised Interior (BIG Changes!)

      By Griffin Donovan · Posted

      From the spy shots, the front end does look like it's borrowing some styling cues from the Canyon. I'm more interested in the powertrain news than the screens though. If the 3.0 diesel survives into the next generation, that alone will keep a lot of current owners interested.  

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