Question about 1998 Oldsmobile Bravada
This is probably the same as it is on the S-10 truck. You'll have to remove the dash to get to the heater core box. Drain the coolant and locate the two hoses on the engine side of the fire wall and remove them. There are large electrical connectors under the dash that have to be unplugged. Remove the large bolts/nuts holding the dash to the frame and drop the steering column to ease removal of the dash. You'll be able to see the heater core box now. Remove the bolts hold it to the firewall and there are also bolts on the engine side of the firewall holding the box in. This is where it gets frustrating. Remove the blower motor resistor that is mounted in the engine bay and inside that hole is another bolt holding the core box in place. With all of the bolts out you can pull the case apart and replace the heater core. Put it all back together and fill the cooling system. Start the vehicle and run the heat on full. Leave the radiator cap off so air can escape. Watch the coolant level and add as needed until the engine reachs normal operating temperature and put the radiator cap back on. The last one of these I did I charged $450 to do plug parts. His next best quote was $950.
Posted on Nov 12, 2010
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Posted on Jan 02, 2017
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