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  1. 911 Problems Forum
    2009 gmc 3500 6.6 turbo. got on the highway the other day and seemed to lack usual get up and go at the top end.. heard light ticking- turned off the radio and barely heard it above road noise- checked all gauges within normal and no check engine light..proceeded carefully By the time I arrived...
  2. 07.5-10 LMM Duramax Powertrain
    Good Afternoon! I have a tuned 2010 LMM with 125k miles. 4 inch straight pipe exhaust. I have done the race plug, lift pump, and have removed my stock fuel filter due to the housing leaking. I am getting 0 codes for the problems I am having. When making a quick acceleration from stop, or a...
  3. 01-04.5 LB7 Duramax Powertrain
    Hello everybody, Been trying to diagnose whats up with my lb7, truck is a bone stock 02’ chevy 2500HD it has 250,000kms with the stock exhaust no muffler. Truck screams at full throttle but feels like its going nowhere. My buddy has two lb7s and both feel way quicker. Ive replaced the...
  4. 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...
  5. 01-04.5 LB7 Duramax Powertrain
    -------------------------------------------------------------------------------- My LB7 started losing power last week. It feels like the turbo is not working. There are no codes, no black smoke and it starts and runs like it always did but with less power. It now has about the same power as my...
  6. 04.5-05 LLY Duramax Powertrain
    Just had Banks economind chip installed and headed out on a road trip. 3hrs into it I loss power and truck (though still running) began to run rough and loud. The DTC codes were P0202 / 2149. Shop guys took a look at the chip installation (even called the mech who installed it) and decided it...
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