1999 GMC Safari Q&A
1999 GMC Safari Question: CHECK ENGINE LIGHT KEEPS COMING ON
Do you know the diagnostic trouble codes that are setting off the light? - Bret Bodas
you said checked, not repaired. re seting the light only lets the problem remain and the light will come back on till you have a diag performed and repairs made to correct the issue. Roy - mastertech6371
4.3L V6 multi-port FI only The exhaust gas recirculation valve (EGR) may stick open causing a rough idle and the Check Engine Light to illuminate. Our technicians tell us that a piece of carbon may...