I have a 4wd lly stock except exhaust and a turbo mouth piece with a limp mode issue only in fifth gear and is getting a fifth gear ratio code between 70-75. 65ish if loaded. I’ve had it in three shops for a few months including the Chevy dealer. Everyone says transmission isn’t my problem...

06' LBZ with S&B intake, 3"down pipe, 4"exhuast with muffler, and EFI live w/DSP5 switch.. T The truck was stock when I purchased it. I've had it for a couple years, and had it tuned and added the aftermarket items shortly after purchasing it. The trucks previous owner had a major diesel repair...

Curious if anyone who tows heavy (12k plus) with a 2020 up L5P is using (burning) any oil and if so, how much and what brand you use. I'm not, but on another forum I belong to there is a guy who is. He's saying if he leaves it in drive and lets the transmission do it's thing he uses oil but, if...

have a 2015 LML, looking to get 750+ hp out of it as a daily driver. wondering what all internally i would need to do to have is running good and reliably. bought it deleted and tuned. going to revert to the Cp3, have the fass 165gph, going to buy the 64mm vvt from duramax tuner. i’ve read a few...

11•13•18. I replaced all my glow plugs yesterday and reset the engine light. Truck started and drove fine. 11•14•18. I placed my key in the ignition and the light came on. I then turned the key and everything went “dark”. No lights on dash, no interior lights and I have lost all electrical...