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1-20 of 38 Results
  1. 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...
  2. 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...
  3. 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…...
  4. 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...
  5. 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...
  6. 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...
  7. General Discussion
    good afternoon everyone! I'm new here and have been lurking for awhile now. But I'm having some issues with my truck recently. It's a 2015 2500 gmc . Recently it takes a little longer to crank. When it does take a minute the cab smells like diesel. The fuel filter has about 30% life left on it...
  8. 11-16 LML Duramax Powertrain
    I've developed an issue with my fuel system where it's losing prime. You can press the plunger crack the bleeder screw to get the air out and it'll be firm for about 3 seconds then it's soft again. Also it does not matter on fuel level. It does it full or empty. I've also not noticed any fuel...
  9. 2020+ LM2 Duramax Powertrain
    I’m installing an auxiliary tank with a gravity feed to the fill tube. I’m pretty sure the fill tube is 1 3/4” however I’m trying to confirm that before I order it. I have a 2020 3500 long bed DRW. It looks like GM changed the fill tube for the 2020. Can someone confirm or give me the...
  10. 11-16 LML Duramax Powertrain
    So I have a lml having it defuels every so often once I get down on it. Put a air dog 2 4g 200 on it. And still having it happen every so often. What’s the fuel pressure I should have at idle to adjust that pump? Nothing major done to the truck.
  11. General Discussion
    I just bought a 13 lml. 155,000 miles. Test drove it all sounded great. After about 300 miles I started hearing a knock, hooked computer up and cylinder 6 balance rate was at -4.2. Changed injector same problem. The noise only comes when the truck it warm or up to temp. I can unplug injector...
  12. 06-07 LBZ & LLY Duramax Powertrain
    Hey guys, I got a 06 lbz with 248k on it. I was daily driving it and i checked the oil every 2 days and it was perfect everytime. I started driving my lb7 everyday so the lbz sat for week but the other day i decided to take it for a trip and checked the oil and it read like 2 inches past the...
  13. 11-16 LML Duramax Powertrain
    My truck has developed an issue lately and I'm really struggling to figure it out. When the truck is started it either can have a little bit of an extended start. If it doesn't just have the extended start it'll fire right up sputter down to just turning over then fire right back up again. I...
  14. 07.5-10 LMM Duramax Powertrain
    This is my first time on this forum and I need some help. I was pulling a 20ft car trailer with a 36hp tractor up a 6% grade going 65mph and my Duramax said reduced engine power and change fuel filter with a p0087 low frp code. This code keeps popping up everytime I climb this grade. My frp was...
  15. 04.5-05 LLY Duramax Powertrain
    While driving the truck I can be on throttle cruising at let's say 12k at the rail. If there's a stop sign coming up I'll let off throttle and the rail pressure will stay at the cruising pressure (12k in this example) and then start creeping up (so demanded is about 4-5k and actual will be...
  16. 01-04.5 LB7 Duramax Powertrain
    Hello! I am new here and have been loving the amount of information available on this site. I have owned a 2002 Silverado 2500HD LB7 for about a year. The truck is stock and has 470,000 kms (292,000 miles) on it. Mostly highway miles as these were retiree snowbirds. I have been having trouble...
  17. General Discussion
    So I just replaced all 8 injectors all with new cups new high pressure lines new return line bolts. I cleaned the return lines really well. Still feel like I have some fuel in my oil and it’s smoking white after I accelerate. It’s black smoke and then white. I really need help here. Any help is...
  18. 911 Problems Forum
    So today while driving my LMM after driving about 150 miles I pull into a parking lot and the truck just died and then I try to start it back up and started to crank with the key for a couple seconds and then after that the key did nothing The primer on the fuel bowl was soft and I pushed it a...
  19. 04.5-05 LLY Duramax Powertrain
    I have a 2005 Kodiak C5500 with a Duramax (LLY). Drove it about 200 yards and it died. I could get it to restart if I continuously pumped the primer on top of the stock fuel filter. Got it home and made the following "fixes". New Fuel Filter. I have two DuraMax trucks so I have a lot of...
  20. 04.5-05 LLY Duramax Powertrain
    I’ll start this off by saying I haven’t heard this truck run yet. LLY. Doesn’t prime. I believe there’s air drawing into the fuel system. Previous owner replaced fuel tank, sending unit, fuel lines up until where they turn up at the fire wall under the cab, filter housing and has a cat filter...
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