It is behind the dash assembly, inside the HVAC (Heating, Ventilation, Air Conditioning) box. Replacing the heater core is a difficult job and more so if the vehicle has AC. If you intend on DIY, purchase a shop manual for that vehicle, you will need it.
No you must remove the dashboard. I just had it done on a 1996 Bravada and it cost me $450.00.
Could be, Low on coolant, A stuck open thermostat, A plugged heater core, A faulty temp blend door actuator,
mine's a 98, but its under the dash on the passenger side (behind the glovebox)
How do i change the heater core on a 1997 ford e150
how do you replace a heater core in a 91 Oldsmobile 98
Here is a website that helped my change the heater core on my 94 bravada on around 12/15/05: http://www.sytyarchives.com/howto/viewarticle.php?article_name=heater_core.php&dir=climate_controls
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how to replace a heater core in a 1997 Chevy blazer
around 1000 dollars but i did my friends for 500 and took about 4 hours call 773-780-6172
Leak in heater core.
To change the heater core in a 1996 Oldsmobile Bravada, first, disconnect the battery and drain the coolant from the radiator. Remove the dashboard components to access the heater core, which typically involves removing the center console and possibly the steering column for better access. Detach the heater core hoses from the engine bay, unbolt the heater core from the HVAC unit, and replace it with the new core. Finally, reassemble everything in reverse order, refill the coolant, and check for leaks.
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