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  1. 01-04.5 LB7 Duramax Powertrain
    Hey guys, I have a 01 lb7 I need injectors on. I want to go with industrial injection Bosch remanufactured 50 over performance injectors. I daily the truck and want to know if I will be all good with these. I already have an air dog lift pump, brand new cp3, Efi live 5 tune, batmowheel and full...
  2. 911 Problems Forum
    I have a 2002 Chevy 2500hd lb7 with 220k miles on it. Injectors we’re done at 180k miles, new cp3 pump was installed at the same time, fuel lines have been replaced, fuel filter housing has been replaced, a Fass pump has been installed, new FPR. Pretty much everything you can think about for the...
  3. 01-04.5 LB7 Duramax Powertrain
    To make a long story short, I have noticed a lack of power along with lots of smoke upon acceleration in my LB7. I have checked the balance rates along with the fuel rate, but I’ve read different articles saying different things. I would just like to be sure as I need this truck for work and...
  4. 01-04.5 LB7 Duramax Powertrain
    Hey guys I’ve been lurking for a long time and recently purchased my first diesel. I bought an 04 LB7 that needs a little love. When I bought the truck the air dog lift pump wasn’t working. I found it had a bad relay and swapped it out and now the pump works well. However, with the pump running...
  5. 01-04.5 LB7 Duramax Powertrain
    Figured I'd try posting on here before taking the truck in for diagnostics I have 2002 gmc sierra 2500hd stock duramax. Ever since I got the truck it's been lacking power. I have more power while towing with my 1500 silverado than I do with this truck right now. No check engine lights...
  6. Introductions
    Bought this 2002 Silverado a few months ago drove and started with no issues even in -30°Celsius went to leave work Nd would not start
    lb7
  7. 01-04.5 LB7 Duramax Powertrain
    Hello everybody, Been trying to diagnose whats up with my lb7, truck is a bone stock 02’ chevy 2500HD it has 250,000kms with the stock exhaust no muffler. Truck screams at full throttle but feels like its going nowhere. My buddy has two lb7s and both feel way quicker. Ive replaced the...
  8. General Discussion
    I plan on being in the market for a diesel in the future and am trying to figure out what would be my best option when it comes to duramaxes. I would like to know which of these is cheapest to maintain, most reliable, and easiest to work on. I’m not in the financial position to be pouring more...
  9. 01-04.5 LB7 Duramax Powertrain
    I’m new to the forum and duramaxes. I may be in the market for an lb7 in the future. I know there were injectors issues with the lb7 and I wanted to know how good remaned injectors r. If I buy a truck it’ll be higher mileage (probably close to 200k maybe a little more) and will definitely have...
  10. How To's, DIY and Write ups
    Thanks to all the great write ups on here everything went pretty well, had minor set back at the end… DO NOT RE USE FICM BANJO BOLT WASHERS! can’t believe that made it suck in enough air to run for about 5 min then die and no reason start but luckily someone on here put their .02 in and BAM...
  11. General Discussion
    What’s up everyone I’m new to the forum and I just started working on my 02 lb7. I installed a s and cold air intake and a edge evolution cts3 tuner this week. I was driving around testing my boost horse power and torque and got readings like 2-3 boost when driving around with 50 horse and 95...
  12. 01-04.5 LB7 Duramax Powertrain
    Hey guys I’m new to the forum already jacked up one post but anyway, been looking at and got to test drive a 2003 single cab gmc duramax. Ran great with but turned over pretty slow but it only took one crank to fire. It’s a 4x4 sle trim with only 86k on the odometer. Guy is asking a pretty good...
    lb7
  13. Transmission Shop
    So about a month ago, my truck started to have transmission issues. The main symptom are ranger selector is missing, whenever I shift into rev or drive it shifts extremely hard, it’s stuck in limp mode, and the check engine light is on. Whenever I do have it in drive it takes a little bit to...
  14. Introductions
    Alright, another lb7 injector question. I have a 2002 Chevy Silverado 2500hd with the lb7 Duramax and 130,000 thousand miles. Once it’s warmed up it knocks at idle I had the man at Autozone plug his Snap-on into it and check my balance rates. In park number 1 was running 9 to 10, number seven -4...
  15. 01-04.5 LB7 Duramax Powertrain
    Hey guys. I just installed new injectors on my 2003 LB7. I was not aware until after putting everything back together that you want to purge the cylinder heads of anything non combustible as to prevent hydro locking. Am I able to still do this with the injectors installed? Can I just pull the...
  16. 911 Problems Forum
    Well the original problem was As titled ran my 2003 duramax out of fuel put several gallons in wasn't able to get it to fire sent to buddy to go and try to get it taken care of he says hes just used starting fluid got it to fire it screamed at red line for about 15 seconds even after the key...
  17. Exterior
    My Duramax started to whine yesterday on my way home. I have a loss of power and the whine increases with my rpms. Any advice or help on what the problem could be? I am concerned its my turbo. I have a video showing the sound but I can't seem to attach it to the post.
  18. Gauges, Electronics and Wiring.
    So intermittently my truck will have a huge kick back (like a really rough shift), and then the gauges will go all over the place and my doors will just keep unlocking and locking constantly, my screen/display for my tuner turns off, and sometimes i lose power to the accelerator. After replacing...
  19. 01-04.5 LB7 Duramax Powertrain
    So I relashed valves on drivers side the noise in my intake went away and today it popped back up today seems quieterAfter valves Before valves After valves After valves please watch and let me know I’m hopeing the truck is fixed it runs really nice now just worried it’s not running properly still
  20. 01-04.5 LB7 Duramax Powertrain
    Hey I know this is a long shot but I have a problem with my lb7 that I can't figure out the problem to I've researched alot and can't seem to find the problem so instead of taking my truck to the dealer I thought I'd reach out to you.... I haven't driven the truck in a while but I went to start...
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