My truck is sputtering, staling, and bucking

Asked by John Nov 25, 2014 at 06:29 PM about the 1989 GMC Sierra 1500 K1500 Extended Cab LB 4WD

Question type: Maintenance & Repair

89 has 160,000 miles.Its allways run great but a couple days ago it started overheating.
We put a new thermostat in and temp is better. It idle's fine but stalls, sputters and
bucks. Any ideas?
Thanks

1 Answer

John answered 9 years ago

I also put some bars leak in the radiator after we changed the thermostat, but didn't let it run or idle for long enough...

Mark helpful

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