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1-20 of 52 Results
  1. 911 Problems Forum
    Yesterday when I fist started my truck I could smell diesel through the vents but didnt think to much about it . Then when the truck finished warming up I was driving and I noticed I wasnt making any boost. About 15 miles later I got off the highway and had to go up a slight hill. My truck rev...
  2. 11-16 LML Duramax Powertrain
    Yesterday when I fist started my truck I could smell diesel through the vents but didnt think to much about it . Then when the truck finished warming up I was driving and I noticed I wasnt making any boost. About 15 miles later I got off the highway and had to go up a slight hill. My truck rev...
  3. Maintenance
    Has anyone used this in their L5P? Did it help? Did it hurt? Thoughts? Thanks
  4. General Discussion
    Got a 2013 LML with 145K miles. Recently I've noticed when I come to a stop and accelerate to go there is a slight lag on the throttle response. Drives normal at all speeds only happens sometimes when I come to a stop. Recently changed fuel filter and air filter about 1k miles ago. Going to...
  5. 07.5-10 LMM Duramax Powertrain
    Hey guys. I'm new to this forum but not new to duramax issues unfortunately. So about 2 weeks ago I put new big injectors into my LMM. I have not been able to get it to fire up since. I have an engine starter on the battery and it will sit there and crank with no fire forever. I've replaced...
  6. General Discussion
    Hello new here… I have a 06 Sierra 2500 HD LBZ that sat and was driven approximately 3 times monthly due to working out of state. I started driving truck regularly again several months ago and within a month of daily driving the truck began to quit running and die at highway speed. I was able...
  7. Gauges, Electronics and Wiring.
    So ive got an lly and a couple months ago my y bridge blew out and I was putting it back in with a pry bar and accidentally broke my fuel pressure regulator. The pig tail was fine and I even put the broken off end in the plug to protect it for when I replace the fpr. A couple months go by of...
  8. 01-04.5 LB7 Duramax Powertrain
    just bought a 2002 2500HD duramax lb7. When i bought it truck will only start on ether and runs fine no engine codes. I can start it on ether, and once i shut it off if i go to instantly try to start it again it wont fire at all and just cranks. I've replaced FPRV and fuel filter. Other...
  9. 911 Problems Forum
    06 GMC Sierra 2500hd 4WD LBZ stock, lift pump, 147k miles. Long post but please bare with me. So there is a strange thing that happens with my truck ever since I got back from a boat trip. The truck had been sitting for about 3 months in my garage and since I’ve started to drive it again, at...
  10. General Discussion
    I have a 26 gallon tank on my lly duramax. I fill up around 1/4 tank and it only take around 12 gallons to fill up. I have a 5.3 v8 with the same size tank and fill up around 1/4 tank and it fills up more thank 12 gallons. Any idea on what my problem is?
  11. 04.5-05 LLY Duramax Powertrain
    Driving down the road my truck will shut off randomly. Lose rail pressure and die with no warning.losses prime as well. Can’t figure it out. Other days there are no issues. Stock fuel filter assembly deleted 42% over CP3 (new) FASS 165(new) EFI LIVE many other parts.
  12. 911 Problems Forum
    I have a 2004.5 lly duramax last night it got to -15 degrees and it started fine and ran fine for a while on the way home however it started dropping fuel pressure. I kept going for a bit then the truck just stalled and would barely start. I had it towed home and tried it this moring it started...
  13. Alternative Fuels Diesel Additives Lubricants
    Hi everyone, and thanks in advance for your advice. My '20 Duramax has been in the shop seven times for a check engine light with code P20EE showing every time. I have searched this forum and found many posts related to that code, but no obvious resolution. The dealer has replaced the #2 NOx...
  14. General Discussion
    I have a 2015 3/4 ton Silverado. When the fuel level drops below around 3/4 tank my check engine light come on. When I fill the tank and drive a little bit, like home from the gas station, the next time I start my truck the light is off. It stays off until I get below 3/4 tank again. It...
  15. 11-16 LML Duramax Powertrain
    Hi everyone, I'm curious to see if anyone has any good tips or tricks to pressurize the fuel system on my lml. It has to have a leak somewhere in the fuel system as it won't hold a prime. I have tried re-sealing the filter original filter head. Replaced the filter head. Switched from oem filters...
  16. 01-04.5 LB7 Duramax Powertrain
    Hey all! I have a stock 2001 lb7 3500 dually. It blew a head gasket(!) about 11 months ago or so. I took it apart while leaving the cab on and the turbo on. Unfortunately a few days before I was going to assemble everything while waiting for parts in the mail, I found out I had Lymphoma and it...
  17. Maintenance
    Hello, I am having the, what I think, is a common problem for the LMM Duramax which is the fuel level sending unit where it says I am empty when I still have like 11 gallons left. Does anybody have a part # for this? I am seeing there are $450 or you can get just the little rod which is $60…...
  18. 04.5-05 LLY Duramax Powertrain
    Truck will start but can hardly remain running and definitely will not drive. Cannot get a read out on injector balance rates and there’s about a difference of -2 between DFRP and actual FRP. So I had dropped the truck off to get the ac condenser and heater core replaced and truck ran without...
  19. 11-16 LML Duramax Powertrain
    I fuel up at a diesel pump at a Walmart gas station, drove approx 25 miles home then 5 miles to meet a friend. sitting with AC on, engine just stops and will not restart. this was on Thursday. Could not get a tow until Friday morning, took it to a local dealer. Dealer got to it on Monday and...
  20. 04.5-05 LLY Duramax Powertrain
    Short story version: Truck sat for two weeks while I waited on parts and time to swap out steering gearbox, pitman arm, and tie rods. That all went fine. Went to take it to the shop today and it stalled out, found that it lost prime. Got it running again and got another 2-3 miles before it...
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