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  1. 911 Problems Forum
    hey all, my 2005 LLY FICM burned up. I found a replacement at a local junk yard on a wrecked truck. I installed it, replaced the blown fuses. when turning the engine in start attempt I have 8000 plus fuel pressure actual, I have injector pulses, and the engine RPM of around 200 as the engine...
  2. 911 Problems Forum
    While I was cleaning the air filter I thoroughly detailed the engine bay. I covered both batteries and the alternator before I pre-rinsed with garden hose pressure, then applied engine cleaner to let soak 15 minutes. After the final rinse I used compressed air to dry every part thoroughly. I...
  3. 01-04.5 LB7 Duramax Powertrain
    Ok here goes!! 04 lb7 Replaced injectors, cp3, fuel rails, junction block pretty much entire fuel system. Has lift pump. Had #8 and #6 injector fail on me. Replaced these injectors primed the fuel system and she fired right up ran it for a few minutes to verify all telemetry was good and shut...
  4. 04.5-05 LLY Duramax Powertrain
    I have a 05 lly, had new heads and injectors under 40k miles ago. Started it after I let my wife drive it one weekend 🤦🏼‍♂️ And it’s got fuel knock from hell. Cleared codes and it ran smooth as a whistle for over 120 miles and then throws codes p207, p2146 and p1293. Balance rates on 1,4,6,7 are...
  5. 911 Problems Forum
    Hey, I'm new here, but not new to the Duramax. Owned my '05 Silverado 2500HD since '07 (off someone's lease) and driven it to 303,000. This time I'm stumped... When it quit I'd driven about 1/2 hour, and just made it to turn into my driveway when the engine shut off and would not restart...
  6. 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...
  7. 04.5-05 LLY Duramax Powertrain
    I washed my truck started it afterwards ran really rough had to tow it first it threw codes for every cylinder figured electrical got wet so cleaned and tge ficm and ecm and replaced pigtail tail 7 started it ran fine for a second then went back to same thing had a p1238 code so I replaced...
  8. Looking For/ Wanting To Buy
    Looking for Fuel Injector Control Module for 05 LLY. Please let me know if you've got one laying around.
  9. General Discussion
    Just bought a 2004.5 2500 from auction and it's missing the ficm. I've went online and they're pretty pricey, anybody willing to sell anything cheaper?
  10. 01-04.5 LB7 Duramax Powertrain
    So i just did all new injectors in my lb7. Got it back together and its loping real bad. After i give a little throttle the loping goes away but at an idle its aweful. So I checked for leaks, nothing. Wont hold a prime either. So i just got off the phone with this diesel mechanic at tires plus...
  11. 01-04.5 LB7 Duramax Powertrain
    What does the computer on the front passenger valve cover control? I bought a used motor and it has this on it, with two openings that look like they are for fuel lines.....and I can't find a diagram or picture with the name of it. Any help is appreciated, thanks!
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