2001 GMC Sierra Repair Question
Asked on November 12, 2012
GMC Sierra Engine Problem
Service engine light came on scanner said lean banks 1 and 2 mechanic replaced intake gasket before i pulled out of there parking lot light came back on scanner said same thing he cleared code light came back same reading lean banks 1 and 2..any ideas
Asked by (pending member)Answer
Replied on November 12, 2012
check fuel presure, low pressure will cause this as well as a vacuum leak.
