what wiil make a 92 gmc just start missing bad and smoking out exhaust

Asked by Aug 30, 2015 at 12:46 PM about the 1992 GMC Sierra 1500 C1500 Extended Cab SB

Question type: Maintenance & Repair

changed fuel filter and plugs but did not help  i just chaged the radiator it was
full off rust

2 Answers

2,265

what color smoke. white, blue, black

1 of 1 people found this helpful.
70,355

Sounds like a blown head gasket. If the smoke is white billowy water condensation out the tailpipe and you have white milky "goop" on the oil dipstick. It's a head gasket. HTH. - Jim

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