1999 GMC Sonoma Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 GMC Sonoma
1999 GMC Sonoma Problems
A Loose or worn gas cap may cause Check Engine Light to illuminate.
The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.
1999 GMC Sonoma Questions
Truck stalled while driving... Got it towed home changed 1 coil pack due to orange/red spark. Changed crankshaft sencor get good spark ,gas and compression but still won't run even if I put gas in throttle body....even checked timing
I recently changed head gaskets, intake gaskets, and distributor. I set the #1 piston at TDC and set the rotor/dist to point at the 6 on the dis housing and when i start it, it idles perfect soon at you go to give it gas instantly starts popping in the throttle body, Not so much of a backfire mor...
have replaced purge valve and sensor, service engine light still comes on.