1999 GMC Sonoma Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 GMC Sonoma
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1999 GMC Sonoma ProblemsInternal Faults in Distributor Can Cause Engine Problems
The distributor may develop internal faults. This can cause a rough running engine or stalling condition and the Check Engine Light may or may not illuminate. The distributor should be overhauled or replaced to correct this concern.
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 QuestionsWhat can cause transmission to not go in gear (1 answer)
The truck does not overheat and it runs ok. There are no codes in computer. Also coolant is new. Standard coolant. Not what came in the truck. Thanks