Posted 4/25/2009 03:11 (#692194 - in reply to #692176) Subject: RE: Chevy diesel pickup service engine soon light on....
NW Washington
My guess is that you have an intermittent engine computer problem, mostly likely cause by a bad or loose sensor somewhere that sometimes feeds the computer bum dope and causes it to screw up the engine performance. Take it to Mr. Goodwrench or someone with a scanner and have them check for error codes.