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  1. 06-07 LBZ & LLY Duramax Powertrain
    Got a knock and black smoke on acceleration balance rates are between -3 and 3 pretty sure its all stock i know i havent done anything to it what should i b checking i checked all boots for a boost leak
  2. General Discussion
    Been fighting an overboost code and power issues with black smoke for a while now. Decided to borrow my buddy's Edge CTS2 to use as a monitor without the tunes. Once up and running I was able to see that my truck was idling at 7psi of boost and my turbo vanes were stuck at 9%. I also checked for...
  3. 911 Problems Forum
    Thanks for reading my post! Last week my 07 duramax with 99K miles (powertrain warranty goes out at 100) lost power and started belching black smoke. It limped home, barely, and the next morning would crank and then go dead, more black smoke. I had it towed 35 miles to a GM dealership, and...
1-3 of 3 Results