Having problems with your 1989 GMC Suburban ?
My 02 suburban 5.3 liter started overheating suddenly. I changed the themostat but it overheats in about a 1/4 mile. How do you tell if the water pump is bad? It's not leaking.
Start it up, when it hits operating temp that the thermostat open,Have gloves on that you don,t get burn,t, Seaze the hoses from the rad going to the engine one at a time to check if antifreeze is flowing trough them, If you don,t feel any flow on the top one ,the water pump is shot, Or you can take off the rad cap, Before you fire the truck up, Start it end watch if it is circulateing though the rad, But i have seen to many people get scolded that way, The hose trick is a safer thing to do. (PS) There could be a blockage ,That is causeing it to over heat All So,
Repair Help & Product Troubleshooting for 1989 GMC Suburban
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