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crank no start
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  1. 01-04.5 LB7 Duramax Powertrain
    Does anybody happen to have any wire diagrams for the 6.6 Duramax? I have a 2001 that just cannot get to start. I popped the fuse box cover off and started to look at wires and noticed a few had some cuts in them I am going to fix them. I am just trying to figure out what wire does what. Code...
  2. 06-07 LBZ & LLY Duramax Powertrain
    Bought an 06 Topkick C4500 with LBZ motor in a non-running condition. Truck has less than 100K on it. Batteries had been disconnected so no codes. Rebuilt primer and it pumps up good, FRP 9k while cranking. It hits a little while cranking. Where to go from here? Anyone one have a trouble...
  3. 911 Problems Forum
    Hey everyone new to the forum, Recently purchased 2nd duramax (04 LB7 with 146k, Cali truck) after owning a lbz previously. Having issues starting. Truck sat for about 4 years in my brothers truck yard but ran great beforehand. Fired right up first day we pulled it out but now seems to have a...
  4. 01-04.5 LB7 Duramax Powertrain
    I've got an 04' silverado with a vin 1 lb7 and once every couple months it will crank but not fire no matter how long you crank. I replaced the primer pump, fuel lines and fuel filter. It changed nothing. I can prime it up tight with no air and as soon as I crank it I lose the prime. I can prime...
  5. 04.5-05 LLY Duramax Powertrain
    Hi guys, I started my truck , a 2005 2500HD Duramax LLY to warm it up after a few days. It started right up with no hesitation. I went to get in after a few minutes and it died. I cranked but it wouldn't start. and it's been 5 days now. Here's the list of things I checked and I know: 1...
  6. 06-07 LBZ & LLY Duramax Powertrain
    Current issue is my 03 Sierra sounds like its cranking strong but will never fire up. I had both batteries tested at the local parts stores and they tested good. I figured since the batteries tested good and wouldn't hold a charge it may be the alternator. It looked easy enough to get off so I...
  7. 01-04.5 LB7 Duramax Powertrain
    Let me start with saying I don't know much about diesel engines or trucks to begin with so thanks for the help ( I definitely cannot afford one of the many high dollar shops in my area since both the wifey and I are laid off due to the Coronavirus bullshit going around)! My 03 gmc 2500 duramax...
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