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the heater core is under the dash on the passenger side.you must look under there and remove the bolts on the plastic heater duck.you will see that with a drop light,the tricky part is loosening the hoses underneath the hood on the drivers side firewall.the heater core comes out from the inside of the vechicle.i just did mine in 2006,it took about 2 hours.good luck..
What else can I help you with?
Where is the rear washer fluid container located on a 1991 Pontiac Transport?
Where is the rear washer fluid reservoir located on a 1991 Pontiac Transport
Where is the heater motor in a 1991 Pontiac transport?
I have changed out the heater/AC Fan motor on a 1994 Pontiac Tran Sport if the 1991 is the same the motor is located on the firewall behind the engine. It's not hard to change out if you have a long extension for your socket wrench, there are four or five small bolts holding it to the firewall, and just two wires going to it, if yours doesn't have a disconnect you may have to cut the wires and then wire nut them to the new motor. Hope this helps.
Where can you find a wiring diagram for 1991 Pontiac trans sport?
Wiring for 91 Pontiac Transport: http://www.auto-olds.ru/PONTIAC%20TRANS%20SPORT%201991.pdf
What would stop a 1991 Pontiac transport from firing?
check the ignition modulator under the distributor cap
How do you change the block heater in a 1991 Buick Park Avenue?
I DON'T BELIEVE THERE IS A BLOCK HEATER.
How do you install a heater core 1991 Pontiac grand am?
you disconnect the heater hoses and see where the connect into the fire wall you may have to take the complete dash out or simply take out the glove box
What is the red dot for next to the fuel gauge in a 1991 Pontiac Transport?
It is supposed to mean that you are low on gas. But I have a '91 Transport also and it stays on all the time, even after I put gas into the tank.
What is the oil capacity for a 1991 6-cylinder Pontiac firebird?
Roughly 4.5 quarts with a filter change.
How do you change the heater core on a 1991 Buick Riviera?
Try the repair tips on the Autozone web site.
How do you change a heater core for a 1991 ford escort?
The dash must be completely removed in order to gain access to the heater box. Then the heater hoses are disconnected and the heater box is removed and opened up. That gains access to the heater core for relacement.
Where is the fuse for the third brake light on a 1991 Pontiac Firebird?
It is listed in the 1991 Pontiac Firebird Operations Manual
How do you replace starter on 2.3cy 1991 Pontiac grand am?
How do you replace starter on2.3 cy 1991 pontiac grand am
