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  1. 01-04.5 LB7 Duramax Powertrain
    Hi everyone, a while back I got into a discussion with a user named longhorn here who posted a fantastic thread about how he created his own lift pump. I decided to give the process a try myself and documented the process on video. Now 2 years later I have finally set down and edited up a...
  2. 911 Problems Forum
    Hello, I was driving on the freeway got a fuel filter message, then reduced power then shut off not to start with p128e. Also I had just filled up at a truck stop rapid fueling (big rig pump), not sure if that’s a factor. I googled it real quick thought maybe I lost prime on my fuel filter, when...
  3. 01-04.5 LB7 Duramax Powertrain
    Howdy. Looking at a 2002 Chevy 2500 to potentially purchase and the listing has it as a no start problem. I’m fairly new to the diesel/duramax world and hoping to get some tips, potential solutions, recommended parts. Etc. The ad lists “ drove it to work one day and then went to get in it...
  4. 911 Problems Forum
    Ok, scratching my head here and I need the truck for this weekend. I just finished up ripping the stock turbo out for an s400, and after putting the truck back together, truck will only crank but no start. Starter is only a month old and cranking healthy, batteries are good and have it on a...
  5. 911 Problems Forum
    I have a 2003 lb7 with 192k on it, for the past 3 months it has had an issue of starting immediately dying then taking about 3-4 seconds to crank, it only happens every once in a while. Truck has had -injectors -fuel lines -tank flush -filter housing -fprv All in the last year or so, I believe...
  6. General Discussions
    I have a 2020 L5P duramax high country currently 35k miles still under the bumper to bumper warranty. I get a check engine light on the dash and then two messages reading vehicle power is reduced and a don’t stop driving like it’s going into regen the def gauge reads 3/4 full the truck has never...
  7. General Discussions
    Hi, new here, also new to being my own diesel mechanic but it's my only option. Having trouble with truck not starting. Any advice would be greatly appreciated. What has happened: Fuel gauge stopped working, about a year ago, About 4 weeks ago A "water in fuel" warning flashed once and...
  8. General Discussions
    have had this truck for bout 3 years never had an issue all egr an dpf deleted an properly tuned till about 2 months ago had a fuel knock so replaced all 8 injectors with 43% one an slapped a duramaxtunner 73mm vvt turbo in as well has the lift pump an all to support the fuel system but a week...
  9. 01-04.5 LB7 Duramax Powertrain
    Starts up with ease no matter the temperature (has started with ease without being plugged in when the temp was around 10 degrees F). No smoke when starting (unless cold/ engine temp below 120 on temp gauge). White smoke when I accelerate quickly getting on the highway (when engine temp is...
  10. 911 Problems Forum
    Ok guys new to forum. Parked 07 2500hd classic w/ duramax in my garage 2 days ago running fine. This morning, when I started it to go to work, it sounds like a ford powerstroke ( loud and clanky) and idles ruff. If i excellerate, it smooths out and quiets down but wont go over 2000 rpm. -...
  11. 911 Problems Forum
    ok so my truck has been kinda breaking up lately sometimes it will do it sometimes it wouldnt im gonna try and change my fuel filter and see if it helps... but also is there anyway to test my cp3 to make sure nothing is goin wrong with it?
  12. 911 Problems Forum
    I posted this in another place on this board, but this is probably a more appropriate place: I wish I had more details on this one, but I haven't driven the truck in question. My sister called and described the following problem with her 2001 Duramax: While pulling a trailer home from...
  13. 911 Problems Forum
    Im a new member of this forum and I just bougth my first diesel. I bougth a 2001 silverado 2500 HD with 148,000 K. I have a problen with now; when i run it over 2000 rpms for i'd say 20 minutes it feels like my diesel supply cuts off, and my service engine ligth comes on, if i try to go...
  14. 911 Problems Forum
    So I couldn't unscrew the FPRV for the life of me and its basically rounded now. Amidst the chaos I took a pretty nice chunk out of my thumb, lost a bolt in the engine somewhere, as well as my phone (which was found about 30 mins later), truck has a few dents in it now, and i tore apart the...
  15. 911 Problems Forum
    I recently towed at Mastercraft boat with my LMM this week on L1 on my Edge Race Evo, and the truck is pouring fuel out of it from the rail on the drivers side. The rail has been opened up on both ends for a shim kit and ported fitting, so obviously those would be the first things to check. But...
  16. 911 Problems Forum
    Changed the fuel filter on my buddys 06 lbz duramax and cant get it to prime. Never had this happen before. When pumping it wont build up pressure and just barely squirts out a bit of diesel. I tried closing the screw to try to build up some pressure and it still wont. Checked all the o...
  17. 911 Problems Forum
    I ran out of fuel and i put 5 gallons of diesel into the tank and primed the fuel filter valve until all the bubbles came out and just straight diesel was coming out. Any other suggestions or short cuts?
  18. 911 Problems Forum
    :confused:OK my Duramax started and shut off after a few seconds like 10 seconds. It turns over but wont start. My batteries are original it's an 04 GMC Sierra. Batteries? fuel filter? glowplugs? any ideas?
  19. 911 Problems Forum
    Well this is whats happing now anybody have a EFI LIVE tune well of course its trhe best heres the problem you know when you DON'T have a lift pump and your foots threw the floor board and on stage 5 and the thing cuts out cause its running out of fuel....and i'm sure theres alot of you saying...
  20. 911 Problems Forum
    Started truck right up and backed 10 feet down driveway and killed on it's own. Will turn over but not firing up. Stock 07 lmm 6.6 full tank of diesel. Help! Thanks
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