20 Most Recent 1998 Pontiac Grand Prix Questions & Answers

First you will need to determine if its your battery or your charging system.If possible borrow a battery load tester.You can also purchase one for about 15 to 20 dollars.If the results are good then you most likely have a problem with your alternator.You can have it tested also at an auto parts store before you buy a new one. You could have an electrical short also.Please let me know if the battery and alternator is not the problem and I will research possible electrical shorts and where they would be located.

vent valve is stuck closed causes fuel not to fill correctly fuel pump module sucks air on grades to steep for pick up to keep fuel flow steady

Did you inspect the wire harness, wires brittle? How many miles on the trans? Is it shifting incorrectly?

The instrument cluster HUD and the instrument cluster HUD dimmer switch are both connected to the instrument panel wiring harness. The instrument cluster HUD dimmer switch performs the following functions: • Provides power to the instrument cluster HUD • Varies the intensity of the display image • Controls the motor driven mirror • Varies the height of the display image The HUD dimmer switch gets power from IP / IGN fuse -10 amp Fuse Block Right side of the IP, in the IP compartment opening

The following instructions will allow you to reset any GM (General Motors), Cadillac, Oldsmobile, Buick, Pontiac theft lock radio.

Requirements: the theft lock radio must be in "LOC" mode.

Procedure:
1. Turn the ignition ON (The radio should display "LOC")
2. Hold down the Radio Presets 2 and 3 buttons for six seconds
3. The radio display changes from LOC to a three-digit number. Write this number down. You now have fifteen seconds to complete the next step.
4. Press the AM/FM button
5. The radio display changes to another three-digit number. Write this number to the right of the first one.
6. You now have a six-digit number, the first three digits are from STEP 03 and the last three digits are form STEP 05
7. Call 1-800-537-5140
8. Press 1 then # (pound). You'll hear "Invalid Code, try again"
9. Press 139010 or 106010 or 206010 or 202107 then # (pound). You will be asked to enter your four or six digit code followed by *
10. Enter the number from STEP 6 then *
11. Listen to the four-digit number and write it down. It will be repeated twice
12. Turn the ignition ON (The radio displays LOC)
13. Use the MN and HR buttons to enter the code from STEP 11
14. Press the AM/FM button. The radio display changes to "SEC". Your radio is now "un-locked" and usable.

If you fail to enter the correct code eight times, the radio goes into INOP mode. You have to wait an hour with the ignition on before the radio returns to LOC mode.

Hope this helps; keep in touch.

There isn't one. It's controlled by the BCM. You have a shorted wire or the switch is bad. Pop the switch out and unplug it. If it still happens(shorted wire) open the trunk and pull the plug off the latch.

Have you performed work on the vehicle lately? Had the console out (assuming a floor shifter) for any reason? If yes, it is possible that you have the cable (between ignition switch and shifter) out of adjustment. If you suspect the brake pedal switch, are the brake lights also stuck on? Do the brake lights illuminate when you depress the brake pedal? Will the cruise control set? Use these three questions to troubleshoot if the pedal switch is functional. If this just suddenly began, then I would suspect the brake pedal switch. Try these things and report back for assistance.

I had the same problem on my 2002 Pontiac Grand Prix GT. I sent my radio out for repair of illumination. You can find online places that will provide shipping labels for sending the radio in and returning it back to you.

Might be your fuel pressure regulator.. also your car might be vapor locked.Next time it shuts off loosen your gas cap... If you hear it sucking in air... that's your problem...or your catalytic converter is clogging up...check the sensors on the pipes..If there bad it tells your car it needs more gas when it really don't...you will smell gas

What is the vacuum reading from the engine in inches of vacuum?

Most likely one of the blend door motors or wiring/ connectors. Check the plugs first. You will most likely need to remove the floor duct work to get to them.

Your ignition switch is bogus. High speed runs directly off the speed control but the lower speeds go thru the ignition switch. Do not know why but that is the way it is!!!!!!!! Replace the ignition switch and you will be back in business.

The closed park position switch within the automatic transaxle supplies voltage to the steering electric park lock. The energized electric park lock pulls the mechanical lock in the ignition key cylinder away from the cylinder. The ignition key can then be turned to the LOCK position. The key can then be taken out of the cylinder. I have 11.53v on the power side and ground side to battery has 11 ohms ? do a voltage drop test on the ground side not ohms . Do you know what voltage drop is ? Learn the right testing procedure , you could have broken wire strands inside the insulation , apply current an the circuit won't work correctly , but would show ok with ohm test's . Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia Electric Testing Techniques You Need to Know

Sure sounds like rusty rocker panels.When it rains water at the windshield drains into the rockers and out along the bottom of the rocker panels.If they are showing rust on the outside they are rusted on the inside.

first check the wire going to the sensor, give it a good clean on the conditions. if this does not sort the problem it could be because of the oil change, muck in the oil could of gotten into the sensor, you maybe able to clean it out but you may need to replace it. when an oil change is done they would put a cleaning agent in with the oil, this loosens any burnt oil off the engine, this burnt parts can stay in the engine and float around and even block the pressure sensor.

probably didn't connect the tacho wire to the right side of the coil for the first problem because the engine was replaced it is possible that a sensor wire to a wheel for the traction light was damaged /disconnected

Do you know how to do automotive electrical testing , checking B+ power and ground circuits , using voltage drop ? Do you know how to read a wiring diagram ? Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia Electric Testing Techniques You Need to Know How to read an electrical diagram Lesson 1 http://www.bbbind.com/free_tsb.html find wiring diagrams here ! The day time running lights module , ambient light sensor , would be a good guess but that's all it would be .Do you know what these are ? Really don't think there is a short in the multifunction switch . Maybe it's time to take to a qualified repair shop , dealer ! Cadillac or Buick . Daytime Running Lamps (DRL) The Daytime Running Lamps (DRL) control module is designed to automatically operate the exterior lights depending on the outside light conditions. The DRL control module operates in 2 modes: • The day mode In the day mode, the DRL control module turns ON the low beam headlamps at a reduced intensity when the DRL ambient light sensor detects daylight under the following conditions: - The ignition switch is in the RUN position. - The headlamps are OFF. - The park brake is OFF. • The low light mode In the low light mode, the DRL ambient light sensor detects darkness, turning ON the low beam headlamps to full intensity through CKT 10. Additionally, the DRL ambient light sensor turns ON the following lamps through CKT 9: - The park lamps - The side marker lamps - The license lamps - The tail lamps --------------------------------------------------------------------------------

Doesn't have one transmission is all electronicly controlled !