Doesn't work on any speed ? high - low . Does your's have manual or automatic climate control ?
Don't think a fuse problem , blower motor control processor more then likely .
Blower Motor Control Processor
The blower motor control processor is an interface between the HVAC control module and the blower motor. The blower motor speed control, battery positive voltage, and ground circuits enable the control processor to operate. The HVAC control module provides a pulse width modulation (PWM) signal to the control processor in order to command the blower motor speed. The processor supplies 12 volts to the blower motor through the blower motor voltage supply circuit. The control processor uses the blower motor ground as a low side control to adjust the blower motor speed.
Look here for fuse location an wiring diagram's http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size. Under system click on HVAC , subsystem HVAC controls . click the search button then click on the 5th blue link . This show's fuse location an wiring diagram for the blower electrical circuit . If you don't know where the rear fuse box is ,it's under the rear seat . It would be easier to just check under the passanger side dash at the blower motor control processor at the orange wire .
Do you know how to test electrical circuits with a voltmeter ?
GMC Yukon HVAC Blower Motor Won Turn On
SOURCE: 2005 Pontiac Gran Prix blower
Check the blower motor which is behind the right side of the dash, in the lower right side of the HVAC Assembly, above foot area of the passenger floor. The other thing to test is the blower motor resistor which should be next to the blower motor.
SOURCE: 2005 Town Country front blower motor inop fuse/relay ok
Break Down And Replace The Blower Motor
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIR-BAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY OR DEATH OR DEATH.
NOTE: The blower motor is located on the passenger side of the vehicle under the instrument panel. The blower motor can be removed from the vehicle without having to remove the HVAC housing.
INSTALLATION
SOURCE: diagram for 2005 magnum\r\fuse blocks
Here's a link to the owners manual free download. Simply put year and model in and it will bring up your manual.
Fuse block information begins on page 307 and ends on page 312
SOURCE: fuse panel diagram 92 pontiac bonneville
Remember that you have several locations to Fuse Panel; check in the Pontiac Bonneville - Owners Manual (page 266 and next) for details and descriptions...
Hope helps (remember rated this)
SOURCE: the blower motor on 2005
The resistor block is normally located in the air box close to the blower motor for cooling.The fact you have no speeds on the blower indicates it might be a fuse. Have you checked them because this is where I would start first.Next step would be to check the blower motor itself.Remove it and give it 12 volts from the battery,it should want to twist out of your hand so hang on.Then I would pull the resistor block and check that.They are usually held in with two screws and if its done you should be able to see the burned out circuits with your eyes.Good luck
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