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  1. F

    Do I need a thicker head gasket or not?

    So, the machine shop I have my engine and heads at said they took 5 or 7 thousands off when resurfacing the head. They said that I just needed to get a factory thickness gasket...I dont know about that. I don't think that they do many duramax engines. I wanted them to cut a key seat in the cam...
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    DK pistons, junk or good?

    I am working on rebuilding my personal service truck with an lmm in it. The cam pin sheared and bad thinks happened from there, as you all well know. Anyways, I stripped it down and to the machine shop it went. They called me today and it made .020 over on the bore. I just had them turn and...
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    Need connector end view diagram for 05 lly

    I am working on a 2005 lly duramax. I have alot of bare wires on the c107 connector. It has a hyraulic hay bed on it that leaked hydraulic fluid down into the wire loom of the engine jumper harness at the c107 connector. Its going to be a fun one. Anyways, I was wondering if anyone had the...
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    Lml ecm pinout diagram needed

    I have a 2013 lml duramax. I keep getting a loss comm with gpcm code. I want to check the continuity across the can/bus wires to the ecm to rule out a faulty wire. I have wiring diagrams, but they don't really show much detail on what pins or which ecm connector the gpcm uses. I could figure it...
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    Got a couple of cylinder contribution codes

    Well, I bought a new truck and sold my 2016 lml. I bought a 2013 gmc sierra 3500 with the lml in it. It had a lot less miles and my other truck was giving me fits with injectors. When I bought it, it had no codes. The next morning, I had 2 glowplug circuit open codes for cylinders 8 and 3. I...
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    Block or head resurfacing?

    Ok, I have a technical question about head and block resurfacing. So, I am currently contemplating on buying a lml truck that says it has blown head gaskets. Now, that isn't too big of a deal for me really. But, upon doing some random reading, someone said the engine block needs refaced??? I...
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    2005 lly duramax map sensor/wiring issue

    Hey guys, I am working on a truck for a guy and it's a 2005 lly. It kept blowing off the y bridge elbow, because it had a cheap egr delete on it. I order the y bridge strap from pro fab and put on for him. That fixed the blowing off issue, but I noticed it was way over boosting. (Probably why it...
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    2016 LML. Maybe a bad injector?

    Hey everyone, I am new to this forum. I need a little advice here. I recently had to do a cam gear install and had the timing cover removed. I didn't have the timing jump or anything. I had a scissor gear fail and caused some teeth damage to the spring gear on the cam. Anyways, I replaced the...
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