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  1. 04.5-05 LLY Duramax Powertrain
    Evening, Im currently looking for a good shop to rebuild my LLY in San Diego if anyone has any recommendations. thanks for the time.
  2. 04.5-05 LLY Duramax Powertrain
    Hi There. I just replaced the fuel filter, WIF sensor, and fuel filter head assembly on my 05 LLY. I replaced the filter head assembly because the threads were leaking and air bubbles were coming out of there. Once I replaced that, there were no more air bubbles or leaks so I thought that had...
  3. 04.5-05 LLY Duramax Powertrain
    good evening, I took my truck in to the shop after a extremely loud knock started and thy dug into it. shop tells me I've got a cracked wrist pin and I'm gonna need a new motor or a rebuild. my truck is completely stock with 195,000 miles, and he said it most like was caused by a bad ejector...
  4. General Discussion
    So my lly has been giving me a low coolant light and water in fuel light the last week or two. Coolant has been coming out the top of my expansion tank and my top radiator hose is a bit stiff in the morning. Along with pressure in the expansion tank in the morning as well. Typically I’d assume...
  5. General Discussion
    I have an 05 LLY and I recently took the motor out and did a bunch of just replacing not really upgrading. However I put a 10 blade exhaust turbine wheel in the turbo from the traditional 13 blade wheel. Now my issue is when I’m going about 40MPH or using my high idle set up switch that taps...
  6. 04.5-05 LLY Duramax Powertrain
    I have an lly duramax with 170k miles on it, everything is stock besides a cold air and efi live, I am having low end boost problems and it seems like my wastegate is stuck open. I've ran a boost leak tester and there is no boost leak, so I've narrowed it down to the solenoid actuator, and I was...
  7. 04.5-05 LLY Duramax Powertrain
    Hey guys , I have a 2005 GMC LLY . I was out hunting for about 6 hours creeping through the bush . When I put it in park the truck all of a sudden jumped to 1000 or so rpm with a loping / surge , similar to a high idle. As soon as I press on the brake it goes back to a normal idle with minimal...
  8. General Discussion
    How much horsepower could I realistically get out of my 6.6 for 15k Canadian 11,300 us?
  9. 04.5-05 LLY Duramax Powertrain
    Okay guys I have a 2004.5 LLY with 285,000 the problem is sometimes when you drive the truck and stop at a stop sign or you go in reverse it pumps out a ton of white smoke and starts to lope bad but when you put it in park or neutral it stops all balance rates are good no more then + or - 1 but...
  10. 04.5-05 LLY Duramax Powertrain
    Okay guys got two problems here. first off I got a 04.5 lly duramax 3500 with about 300,000 on it. it has been sitting for about 2 months now and I went to start it oil pressure went to 70psi. so I let it warm up now it’s at 65-70 at idle. I drive it down the road I’m getting 115psi or more it...
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