20 Most Recent 1991 Pontiac Grand Am Questions & Answers

There is a lot involved in replacing these speakers. You should also know that the original factory speakers are 10 ohm speakers. This means that if you replace them with new speakers (most of which are 4 ohm) you run the risk of damaging the stereo, the speakers, or both. This can also cause a potential fire hazard in your car. If you want new speakers, you really should look at installing a new stereo as well.

To get to the back speakers, you will need to remove 2 bolts located under the front edge of the rear seat (bottom). After you remove the bottom, you will need to remove the rear seat (back). This involves removing the bolts that hold down the rear seat belts, which is a large sized torx bit (T-45, T-47, or T-50... Don't remember which). After removing these, lift straight up on the seat back to remove. Now remove the deck brake light housing, and the bracket that holds it. Now the deck cover can be removed. Be careful not to bend it too much getting it out from under the side trim on both sides.

For the front speakers, you must disassemble a good portion of the dash. Remove the screw holding the light switch and the wiper switch housings. This screw is underneath each housing. Once removed, there are dash mounting screws behind them. These screws (and many of the other dash screws) are a smaller torx-bit (T-10 or T-15, don't remember which). Sometimes they use a 7mm bolt. There is a cover panel just above the glove box. This panel is held on with 2 screws located in the glove box. After removing this panel, you will find 2 or 3 bolts holding on the dash. Last but not least, you will find 2 bolts inside each of the defroster vent grilles. These grilles just snap out for easier access to the bolts.

1991 Pontiac Grand Am Car Radio Stereo Audio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4" Round
Car Audio Front Speakers Location: In Dash
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6" x 9" Oval
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

1991 Pontiac... | Answered on Feb 22, 2018

try replacing fuel pump relay in fuse box , also turn key forward till dash lights come on with out starting it see if u hear fuel pump , if not most likely fuel pump when out

1991 Pontiac... | Answered on Jan 07, 2018

To remove the bolt with the rounded head I would try cutting a slot in the top of the bolt head. Cut the slot to fit the largest straight tip screwdriver that you can find. then use a pair of pliers or vise grips to grip the shaft of the screwdriver to put more torque on the screwdriver (it helps if the screwdriver has a square shaft. If you think that the bolt is too seized into the engine block to try that, another thing to try is to weld another bolt to the head of the original bolt, (I would use a wire feed welder) so that you have an undamaged bolt head to use a wrench on (preferably a strong socket wrench). If you do weld another bolt onto the original bolt, make sure that you let the bolt cool down completely because when you get the bolt hot, it will expand and will not break loose until it has cooled. Have a fire extinguisher handy and good luck. Hope this helps.

1991 Pontiac... | Answered on Mar 08, 2017

need to know what it does when you turn it over does it at all make a sound what? need info do the gauges moves if there are gauges, does interior lights come on is there power at all, does it click, are the battery cables securly tight, is it in park try taking out of park, then putting it back in park, need details.

1991 Pontiac... | Answered on Mar 07, 2016

The casing is not solid, but has 2 shear bolts that have to be drilled out of backed off with chisel and hammer, ccw.

1991 Pontiac... | Answered on Jan 15, 2016

The casing for the lock cylinder is not solid and it has to be 2 pieces in order to fit around the steering column. But the reason you can't see that it has two pieces is because they are held together by bolts that are designed to have their heads shear off after they are tight. You have to drill out the shear bolts or back them out with a hammer and chisel to turn them CCW.

1991 Pontiac... | Answered on Jan 15, 2016

I'm pretty sure a quick call to your local Buick dealer parts man will get the answer. He'll have the parts database to hand. It looks like you know the answer already?

1991 Pontiac... | Answered on Nov 15, 2014

Assuming you gapped the spark plugs correctly, and got the correct wires from the distributor cap to the correct spark plug (believe me, this is a common error people make) it sounds as if it has "jumped time." If you don't have one, get a Chilton/Haynes manual for this car. The troubleshooting section will give you, in descending order, most likely cause of your difficulty. Another idea, is that your distributor has lost the crank shaft pin. But I'd look to the distributor to plug wires first. ( My father-in-law, who has rebuilt many engines, made this simple error on a 4 cyl Ford. Didn't realize it till I showed him the diagram in the repair manual.)

1991 Pontiac... | Answered on Nov 09, 2014

Sounds like you need new spark plugs and wires also a throttle body cleaning.

1991 Pontiac... | Answered on Nov 02, 2014

Make sure that the idle motor is working.When you start it should run about 1200 rpm for a few seconds then go down to 600 rpm If not it may need cleaned or replaced.

1991 Pontiac... | Answered on Oct 30, 2014

Sounds like you have an air to fuel mixture problem, have you put a scan tool on it, being a gm i suspect it may be the mass air flow sensor/map. Pull the codes to see why you are dumping fuel

1991 Pontiac... | Answered on Oct 10, 2014

Usually the cause to this would be either bad spark plugs, bad spark plug wires or if they are new then it could be as simple as a vacuum leak but it is an older car and valve clearances might be off, valves could be clotted with carbon, not allowing the to open or close properly.

1991 Pontiac... | Answered on Jun 17, 2014

adjust belt as needed

1991 Pontiac... | Answered on Dec 28, 2013

You have 3 coils located on top of the ignition module with 2 spark plug wires to each. Usually on that vehicle only one coil dies at once. But if you have no spark at all the ignition module would be the usual problem. There are a couple other unlikely things that can also cause this problem but it will require a repair shop to diagnosis them.

1991 Pontiac... | Answered on Feb 19, 2013

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