Prater

2003 Duramax 6.6 3500 Chevrolet

I just finished a 4000 mile round trip and about 3600 miles into it I lost power on the interstate. The check engine light came on and I did a diag through Onstar. They reported a loss of fuel pressure. I drove at about 65mph for another hour until I reached my stop for the night, anything above that and it dropped power. After it sat for about thirty minutes the light went away it it drove fine until about 3900 miles. Then it acted the same way. Both times I was in a rain storm, but visual inspection did not show any water around the electronics. I did fill up with cheaper diesel at a truck stop just before the problem. I just purchased a new fuel filter and will get it on tomorrow. Has anyone experienced a simular problem, or does it sound like my fuel filter is clogged?? The truck has around 70xxx miles. I also noticed smoke coming from the exhaust as I come to a stop now, think maybe a fuel injector is also stuck open??

Thanks in advance for suggestions...

my32dominator

Sounds like a Fuel Pressure Regualor. Just had the FPR replaced in my 04 LLY.

Rippem

when was the last time the filter was changed?

bob

An injector not closing properly will also drop fuel pressure.

45sonic

Mine was caused by the injectors. Fortunately warranty cover them.

Prater

I purchased the truck about six months ago and have put about 10 thousand miles on. I figured the filter would need to be changed anyways.

Are the injectors covered on the 100 thousand or just the 50 thousand mile warranty??

45sonic

Fliter should be every 15K or so. As far as the engine, it should be under the 100k (I think) but you will have to check with your local dealer

Rippem

they are covering injectors 100K

Turbojack

2001 has 200,000 miles on injectors due to them having so many problems with them.

jordy

So does the '02. 200K