truck

Asked by GuruTC1FT Jun 27, 2018 at 06:03 AM about the 1990 GMC Sierra 1500 K1500 4WD Standard Cab SB

Question type: Maintenance & Repair

I have a 1990 gmc 1500 4x4 5.7 it runs hot with a thermostat in not sure why

1 Answer
7,385

Brianator answered 5 years ago

Thermostat could be sticking and not opening fully, low on coolant, plugged radiator or worn out fan clutch

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