bad diesel fuel, other on 04 GMC Duramax 6.6L [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: bad diesel fuel, other on 04 GMC Duramax 6.6L


vaughn15
01-15-2005, 01:10 AM
I believe I posted this in wrong place...think mine is an LB7 purchased 05/04.
Twice we have been on the road and our diesel has downshifted at 2000 RPMs, could not drive above 2000. The first time at 32,000 miles a few weeks ago, changed fuel filter (diagnostic reading at out of town dealer stated this was what was needed), all went well until today after another 3500 miles, downshifted to 2,000 RPMs and wouldn't run above that. We were out of town again and had the dealer put in another fuel filter....the computer read out was PO Code...PO202; P2149. All seemed okay for a while and the service light came back on a few miles out. We will take to local dealer on Monday where we purchased new....any ideas, i.e., bad injectors, bad fuel, other.

Thanks!

jholly
01-15-2005, 01:34 AM
You have bad wiring or a FICM problem. It is not bad fuel or need for another filter.

Jim