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Don't have pin test kit one would be nice. I will try the spray bottle tomorrow and continue to peel back the remaining harness.

I peeled the wiring harness back from the EDU unit up past the alternator to the driver side engine and could not find any issues. I have ordered new injector connectors for the remaining 6 just hoping maybe it could be one of them and wait for a failure.

I'll take any suggestions at this point. I will run the wiring around the alternator and see what I can find. Just crazy that when its runs its just like when it was new. Thanks

Need help once again truck is a Chevy 2004.5 LLY 2500 HD 66,000 miles. I had this same problem last year truck would shut down completely and I would have to pump the primer to get to run like it was out of fuel never actually run in a limp mode either run or not. I replaced the fuel hoses, new...

Need help once again truck is a Chevy 2004.5 LLY 2500 HD 66,000 miles. I had this same problem last year truck would shut down completely and I would have to pump the primer to get to run like it was out of fuel never actually run in a limp mode either run or not. I replaced the fuel hoses, new...

I have a shop full of tools but no lift.

(My reply yesterday should have said NO more codes) Only 66000 on the motor, I didn't have to pull the motor. Removed both inter fender wells and had a lot of patience, up pipe bolts were tough getting out. About a 8 hour removal and a 8 hour reinstall.

Just giving a shoutout to Tefermanator, I finally pulled the turbo on my Duramax last week (what a job) it was just as you said, veins were stuck and all sooted up unison ring was cracked. I cleaned up the veins and turbo installed a new unison ring and gaskets. Truck is running great and...

2004 LLY do you have to do a relearn if you replace the vein position sensor.

Thanks,

Ok thanks I can take care of driving it harder and getting more exercise.

I removed the vein position sensor today it had a some build up on it so I cleaned it and replaced code light is off for now is this a good indicator it is a bad sensor. Is there a cleaner you can spray to remove the soot.

2004 Silverado 2500 HD 6.6 LLY 65000 miles. Truck is stock bought new only used to pull a 32 ft camper. Truck runs good, engine light has come on at different times and then would go off and stay off then come back on. now it stays on all the time. I removed the battery terminals pulled the...

Worked on diesel construction machinery most of my life I never seen anything as strange as a this Duramax I purchased new in 2004. I removed the new filter to check the o rings, I know it was a new assembled unit but you never know and all was ok. The old filter, primer pump and fuel I first...

I removed the new fuel filter assembly to check the gaskets they look good. Re installed and pumped the primer again the truck cranked and run fine for about 5 minutes then died. I have check engine light on not sure what that is I am going to purchase a OBD2 today and see what code it is. I...

Can't find any other hoses that look cracked. I wouldn't think the new primer pump would be bad it is just like the old one you pump it up tight and in a few minutes it is soft again. Should it stay firm?

Run all the fuel lines out today could not find any loose fittings. I replaced the fuel lines and added new worm clamps coming from the filter they looked a little cracked. Pumped up the New primer tight. (Is the primer pump supposed to stay tight after you pump it?) Truck cranked right up check...

These were no evidence of wet fuel around the primer pump I replaced. I will check out the fuel lines and fittings today back to the fuel tank.

I have a 2004 2500 HD Duramax LLY stock truck with 65000 miles. I am having a problem with the fuel. Cranked the truck on Saturday and it run ok then it was like it was running out of fuel. Cranked it back up and it run fine. Drove the truck to town on Sunday stopped at the hardware store truck...