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  1. Random Knock with light throttle

    04.5-05 LLY Duramax Powertrain
    Ok guys I have a lly thats bone stock. 175000 miles on the truck. I have a random knock that sounds like a bad injector. The conditions have to be just right for it to knock. Light throttle and cruising down the road. Even then it doesnt happen all the time but is becoming more frequent. Get on...
  2. injector issues? need help

    911 Problems Forum
    first off truck is an 05 lly with 97000 miles, edge juice w/attitude 4"mbrp exhaust and lbz turbo mp. Other than that its pretty much stock i did head gaskets on it about 15000 miles ago and havent had any issues up until now. The problem happened about two weeks ago on my way to work in north...
  3. Cold LB7 Knock

    01-04.5 LB7 Duramax Powertrain
    After my truck has sat all night at work I start it up to head home...and there is a very noticable knock for about the first five minutes or so of driving. Any ideas?
  4. Help new to duramax and have a knocking noise

    04.5-05 LLY Duramax Powertrain
    I have a 2004.5 duramax with the lly. I just bought the truck with 130,000 on it it runs awsome but I have a knocking or clicking noise under half throttle accelerating form 55 mph. It is really bothering me and don't know wat to do if u really step in to it when the turbo spools up it goes way...
  5. Knocking sound and hesitation

    04.5-05 LLY Duramax Powertrain
    New here and need some help. I have a 2005 silverado with 130K miles on it. It's a stock truck with no tuner. I haven't changed anything on the truck. Here's my problem. When the truck is cold it does fine. When it warms up is when it notice the problem. When maintaining my speed at...