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  1. 2

    LZ0 Article & Video - Durability Issues

    Here is a brief article and 6-minute video about durability issues developing on the LZ0 Duramax engine: https://gmauthority.com/blog/2026/05/gm-technician-shows-problem-with-lz0-duramax-engine-video/
  2. 2

    GM V-8 Engine Tick

    GM has determined (decided?) that if your V-8 engine ticks at idle, for up to 10 minutes, that is normal: https://gmauthority.com/blog/2026/04/gm-tells-dealers-v8-engine-ticking-sound-at-idle-is-normal/
  3. 2

    TSB: Possible LR Leaking Half-Shaft Boot (2021-2025 models)

    This new GM TSB documents a potential problem with the LR half-shaft boot leaking, due to a misrouted brake wear sensor harness: https://gm-techlink.com/?p=20891
  4. 2

    At Least 36 L87 / 6.2L Engines Failed After Recall Inspection

    The NHTSA may be expanding their investigation involving the GM safety recall of hundreds of thousands of vehicles equipped with the L87 / 6.2L engine, after at least 36 reports of the engines failing after passing the safety recall inspection and oil use modification process...
  5. 2

    LZ0 Engine Misfires

    GM is investigating potential LZ0 engine misfires: https://gmauthority.com/blog/2025/11/gm-investigating-occasional-duramax-diesel-lz0-engine-misfires/ Post and title edited to correct the RPO engine listing.
  6. 2

    2021 Tahoe / Yukon / Escalade Safety Recall

    GM is recalling numerous vehicles, including the 2021 Tahoe / Yukon / Escalade, to replace the fuel pump power control module: https://gmauthority.com/blog/2025/09/gmc-yukon-terrain-and-others-recalled-over-failing-fuel-pump-control-module/
  7. 2

    Chevrolet Dealer Gunfire Sale?

    Here is a Chevrolet dealer that may be having a gunfire sale after one of their employees began firing a gun inside their showroom: https://www.wcpo.com/news/local-news/hamilton-county/colerain-township/police-shots-reportedly-fired-at-colerain-car-dealership-no-injuries-reported
  8. 2

    Interior Light Switch?

    I recently bought a new 2024 Tahoe Premier 4WD. I cannot find a switch to turn on all the interior lights. The literature that came with the vehicle is no help. I tried ordering an owner’s manual from Helm Inc. but they are on back-order. There is a switch on the center, overhead console...
  9. 2

    New Member - New 2024 Tahoe

    Hello. New member here. Today I purchased a new 2024 Tahoe Premier 4WD, incandescent pearl white with the maple interior. This is my first Tahoe, but I have owned GM / Chevrolet vehicles continuously for more than 50 years. My first car at age 16 was a used 1965 Chevrolet Chevrolet Malibu...

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