× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 1991 GM K2500 EST Issue, Information Inacurate
Posted to Technical Discussion Forum on 12/22/2003

I'm with the other fellows, It aint breathing. or vac leak under the intake sucking up oil from lifter gallery.

easy to check pack presure. pull O2 and check

with PCV removed from valve cover and oil filler plugged, check at valve cover breather hose for e... Login to read more.