20 Most Recent 2003 Pontiac Montana Questions & Answers

If you are replacing the entire mirror assembly you have to remove the door panel.

First remove the switch plate by prying upward at the rear of the switch plate and unhook the connectors. Then remove the two armrest screws. The door panel then has to be pryed away from the door to release the clips. They don't give up easily so yo may have to force it a bit. Once the clips are loose pull up on the panel to remove it from the window reveal molding. The mirror is held on with three 10mm nuts. remove those and unhook the wiring from in the door. Install is reverse of removal.

Good Luck

2003 Pontiac... | Answered on Jan 01, 2020

it could be a problem with the injector for that cylinder(dirt or electrical).how are the other plugs do they need to be replaced.

2003 Pontiac... | Answered on May 06, 2018

Under drivers side headlight behind the bumper.

2003 Pontiac... | Answered on Mar 13, 2018

how do you go about replacing an alternator on a 2003 pontiac montana

2003 Pontiac... | Answered on Mar 11, 2018

Bad connection , battery cable bad ect.... voltage drop test .
Starter Voltage Drop
How to voltage drop test starter motor circuit
Looking at a wiring diagram to see what all is involved in the starter electrical circuit for your vehicle .would be a good thing to do. Do you know what a wiring diagram is ? How to read one ? How to use a DVOM- digital volt ohm meter to test automotive electrical circuit's . Free wiring diagram here http://www.bbbind.com/free_tsb.html Enter vehicle info year , make , model an engine size. Under system click engine then under subsystem click on starting . Click the search button then the blue link. Testing the electrical circuit's is the way to find the problem .

Chevy Truck No Start Flickering Lights Gauges Voltage Drop Testing

2003 Pontiac... | Answered on Jan 18, 2018

Tail lights acting insane?

We had the same issue with our 2000 Pontiac Montana. Brake lights, turn signal lights, running lights, back-up lights and emergency flasher didn’t work at all or operated at random. The cause: poorly designed aluminum contacts on the tail light circuit board and wiring harness connector arced over and disintegrated with normal use.

Pull the tail lamp assembly, remove the electrical connector and look for burned contacts on the connector plug and the connector socket (they call this long plastic piece with the socket the circuit board: it includes the four bulb sockets. Replace the circuit board and the wiring connector.

You can DIY this job with basic auto mechanical/electrical skills and tools. The two circuit boards and the two connectors set me back $230 (2009 cost) for new parts. The electrical contacts on the factory replacement parts are improved.

I needed a T-30 torx driver to remove the tail light assembly (you need this to change out bulbs, too), wire cutters, wire strippers, electrical tape and an electrical lug crimper to do the job.

2003 Pontiac... | Answered on Dec 19, 2017

No matter what anyone says, Do NOT use conventional coolant. This system was designed for DexCool. As long as you don't run the engine while low on coolant, DexCool is still the best option. To do a complete flush you'll have to tap into the heater hoses...not that easy.

2003 Pontiac... | Answered on Nov 12, 2017

Master cylinder needs replacing .

2003 Pontiac... | Answered on Oct 10, 2017

Body Control Module (BCM)
Below the right side of the I/P, right of the I/P compartment

2003 Pontiac... | Answered on Aug 07, 2017

Check YouTube for something similar

2003 Pontiac... | Answered on Aug 03, 2017

Check the adjustment on the brake light switch directly above the brake pedal

2003 Pontiac... | Answered on Jul 21, 2017

Go back to the dealer and ask what is going on...Take them to ministry transportation!!!

2003 Pontiac... | Answered on May 10, 2017

Idle in drive at 600 to 800 rpm.

2003 Pontiac... | Answered on May 08, 2017

At the passenger switch its the Dark Blue and Brown wires.At the Master switch its the Light Blue and Tan wires. But I think your problem is a bad Master Switch

2003 Pontiac... | Answered on Apr 29, 2017

call any auto parts store to find exact location of heater core. yes you can bypass it, but you will have no heat inside of car, it needs to be replaced. to bypass just hook hoses from core together, without going through heater core.

2003 Pontiac... | Answered on Apr 26, 2017

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