Question about 1991 Pontiac Bonneville
I just recently had to do this myself, and thankfully its not too difficult. for ease of access start by removing the plastic cover that protects the fuses and relays in the engine compartment. next, using a 1/2" socket or wrench remove the two nuts that secure what seems to be a lift brace on the back of the engine.
with those two items out of the way diconnect the power from the blower motor. use a 9/32" wrench or socket to remove the 5 or 6 bolts that secure the motor to the firewall. with the bolts removed you may need to gently pry the rubber seal off of the firewall in order to remove the motor.
with the motor loose you should be able to spin and jimmy it around the tube that the tranmission dip stick resides in and remove it from the car. remove the rubber seal (and blower blades if necessary) from the old motor then follow the directions in reverse to install the new one.
Posted on Jan 20, 2009
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