how do you replace a heater core in a 91 Oldsmobile 98
134a
Only the Olds Intrigue with the 3.5 L
5 quarts
Need clarification on what you are asking.
Under the glove box.
punt
Dealerships or junkyards.
Heater core is inside dash board by firewall.
it is in the middle of the car inside thedash area on the very bottem of the coverd areA back by the foot area you need 7mm and alot of time about 2 hours to change it
you need to replace your heater core.
Yes, it is called the OBD2 code list.