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check engine light

  1. General Discussion
    Hi all, this is my first post on your forum. I bought a new 2021 Sierra 2500HD today. The truck had 31 miles on it when I purchased it. On my way home the truck now has 50 miles and a check engine light came on that won't go off. The dealer told me to open and close the door and try to restart...
  2. 911 Problems Forum
    Installed s&b CAI on 2021 chevy silverado 2500hd 6.6 Duramax. Disabled air filter as stated in message bar and has thrown a po26c code twice. Any1 else experience this issue or know how to get it corrected? Installed with 750 miles on truck and came on about 800 miles, cleared it and now its...
  3. General Discussion
    Hello everyone, i was driving home this morning from work, and i was going up a decently steep hill. i was accelerating pretty hard before i heard a noise and then my truck kinda jerked a little, then my rpms dropped, then started increasing but my transmission wasn’t shifting right away, then i...
  4. 2001 - 2007 (GMT800) Non Powertrain
    I have a 2006 duramax.I failed emissions cause my check engine light wouldn’t come on when they turned my key to the on spot. Pulled my cluster out to see if the bulb was there and it was all my other lights turn on. I thought I could change the bulb out but it looks like it can’t be replaced...
  5. 04.5-05 LLY Duramax Powertrain
    Hey all, check engine light came on 4 days ago, pulled the code (and cleared it) yesterday and it was P0670. Today, it came back on. I have been reading and want to pick your brains. Who has had this problem and how did you make it go away? I could replace the module if I am 100% sure it...
  6. General Discussion
    I have a 2007.5 with an LMM engine. My check engine light came on (out of the blue) and when I try to remote start, it starts and shuts off right away. It seems to run okay except it's a bit quiet and I can't really tell if I have any power loss. Other than a lift and 35's, the truck is totally...
  7. 911 Problems Forum
    I purchased a used 2006 lly Dmax and shortly after I kept throwing a code for "Turbo Charger Position Not Recognized". I took it to the dealer and they replaced the turbo charger sensor and said that is where the problem was. Well I got the same code about 2 weeks later. After spending about a...
  8. 911 Problems Forum
    (TDFDiesel) Edit: Here is a free resource shared by a member. It appears to offer DTC codes by manufacturer with further documentation for Troubleshooting. My initial reviews looked like it was an extensive database. Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis I did not...
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