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  1. 911 Problems Forum
    2020 duramax l5p ring when accelerating on and off. 2020 l5p ring/squeak
  2. General Discussion
    I had an issue with my 04 lly, poped the hood and there was a good amount of oil around the turbo area. Still creating the same amount of boost and still the same loud whistle it has always when I bough the tuck last August’s. The turbo is just about 2 years old. Some other issues were a...
  3. Gauges, Electronics and Wiring.
    So this is on my dads truck. He’s not very tech savvy so I’m on here trying to see what you guys have for info. So the first problem is the entire right side of exterior lighting is out. Also is a GMC Denali, (Headlight Eyebrow, cab light, dually marker light and rear tail light) can’t find a...
  4. General Discussion
    So I recently bought a 2003 2500hd 6.6L duramax. I didn’t have problems in the beginning but then I noticed when decelerating there was a low wind down hum. (Don’t know if this is connected) Found out I was low on transmission fluid... REALLY low. It took a whole quart and still isn’t full...
  5. General Discussion
    Ok, so I’ve got a 03 LB7 duramax, with 402,000 miles. it has a kinda rough idle, like it’s missing on a cylinder, with a constant power surge. when you give it some gas, either in park, or going down the road, it clears up and runs great, but it black smokes like crazy. I’m talking about cars...
  6. Transmission Shop
    I recently pulled my transmission after the torque converter went bad. While I had it out, I decided to pull it apart and inspect the internals. Mind you, I have built one of these transmissions in the past with good success on my LB7. I found the C3 clutches had a little more wear than I liked...
  7. Exterior
    so ive had my hid's for over a year now and recently i noticed my passenger side low beam flickering rapidly then it will stop for a bit run normal then flicker and sometimes go out.. i shut my truck off i turn my lights on and both lights come back on? so the other night it was flickering i...
  8. 06-07 LBZ & LLY Duramax Powertrain
    Hey guys I am having some trouble with my transmission getting too hot. I have a 2006 GMC Sierra 3500 with 140,000 miles on it. 6.6/Allsion. First I was driving home in traffic on a very cold day. I had remote started my truck and it setting idling for a while and I believe at the time I had...
  9. 911 Problems Forum
    Last night my husband updated his PPE Hot+2 programmer before setting his truck back to stock settings and we're trying to figure out if there is anyway to fix this issue without having to take it to a dealership to have it flashed. He has an 2005 3/4 ton duramax...any ideas?
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