Wonder if can be mass flow sensor problem or climate control relay
Car Q&A communityAsk Your Question
2002 Chevrolet Silverado 2500 HD, 6.6L V8 Diesel Turbo, 1950chuck, Livermore, CO, October 05, 2010, 11:01
Service engine light came on and stay on. Had diagnostic ran. Diagnostic code PO540. Based on ...