Question about 2003 Pontiac Grand Prix

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In my 2003 gran prix, the daytime running lights, driver info center and HVAC (on any speed) won't work. What could be the problem?

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All at the same time? Do they come and go? I would check IGNITION SWITCH.

Posted on Nov 12, 2009

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Pontiac grand prix problems


Clean throttle body and idle speed control valve.
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I have a 2005 GMC Envoy. I had a battery issue that has been fixed. I am not sure if this is related or that I just noticed. 1. My headlights stay on even though there is plenty of light outside/daytime...


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2. It sounds like the HVAC system may have lost calibration after the battery issue. Try turning all HVAC controls off or to their full CCW positions, then disconnect the battery for about 5 - 10 minutes. Reconnect the battery and don't touch any thing for a few minutes. If this does not make your AC work again, you may have a problem with one of the blend doors or its actuator motor. BTW, there is no vacuum operating the HVAC system, it is all electric.

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1997 Pontiac Grand Prix GT; Elec problem with fan


Replace the blower resistor that is mounted next to the blower motor on the passenger side of the vehicle.
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CHECK THE HVAC CTRL FUSE.

WITH A TEST LIGHT CHECK THE BLOWER RESISTOR FOR POWER ON THE YELLOW, TAN, PURPLE, AND LIGHT BLUE WIRES. THE ORANGE WIRES CONTROL THE HIGH SPEED CIRCUIT. DO THIS FOR EACH POSITION OF THE BLOWER SWITCH.

THE BROWN WIRE ON THE HVAC CONTROL CONNECTOR 1 POSITION B COMES FROM THE HVAC FUSE 20 AMP. NO POWER ON THAT WIRE WILL CAUSE THE BLOWER TO NOT FUNCTION ON THE LOWER SPEEDS.

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1 Answer

2005 Pontiac Gran Prix blower does not work. I check the fuse at HVAC fuse at the end of the dashboard and it is OK. The switch itself activates the AC light on and off when I turn it...


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.

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2 Answers

Brake lights not working the window brake light works.haz light works.turn signals work it just the rear brake lights


I have the exact same problem on a 2003 Gran Prix GT. All lights including Stop Light works. Brake lights do not. Have you found a solution.

Aug 21, 2008 | 1997 Pontiac Grand Prix

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