Question about 1997 Pontiac Grand Prix

1 Answer

My 97 Grand Prix is having radiator cooling fan problems. I know that one fan is to come on when it reaches a certain temperature and the other for when the a/c is turned on. I disconnected the fans and jumped them to the battery and both fans work. So I know it is not a fan problem or fuses. My question is, are the three relays under the hood prone to breaking or how do I go about figuring out what the problem is?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 564 Answers

Could be temp senders,,,hook up scanner & watch temp out puts to see if they are working

Posted on Feb 01, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How to remove and replace the radiator on a 97 grand prix 3.8

Generally, you drain it, remove the hoses and trans lines, the cooling fan, and the 4 bolts that holds it in.

Jul 06, 2012 | 1997 Pontiac Grand Prix

1 Answer

Power steering pump on my 2001 mini one stays on when the ignithion is turned off

It is not your ps pump that is staying on, it is the ps pump COOLING FAN located below the pump. On 2001-05 Minis, this fan is wired directly into the wiring of the main radiator cooling fan, which has two speeds, low and high. When the engine compartment temperature reaches a certain level, the main radiator fan is supposed to come on, and since the ps cooling fan is also wired into that, it is supposed to also come on. But, that low fan speed is achieved by routing power to a resistor, located at the top back of the radiator on passenger side, that cuts the power down. This resistor is highly prone to corrosion and failure. When that happens, neither the main radiator cooling fan nor the ps pump cooling fan can come on UNTIL the engine compartment temperature reaches an alarming level, which switches through a relay power directly to the fans, by-passing the resistor. By then both fans are attempting to bring the temperature back down to a safe level. Then, if you turn your engine off before the temperature reaches the lower threshold so that the fans are still running, the ps pump cooling fan will just keep right on running, as there will be no relay signal given to turn it off, and your battery will be drained.
To fix this, the resistor either needs to be replaced, or, the resistor can simply be removed and the contacts jumped. This last fix will mean that when the lower temperature threshold is reached, the main radiator cooling fan will come on at full speed, and the ps pump cooling fan will also come on. After my ps pump failed due to fan failure, I did this to my '03 Mini, and have run it for years this way. No more ps pump problems. You do need to make sure you keep the fan clear of debris and freely turning, or you could have bigger problems, like a fire, since the wires will get very hot sending power to the fan motor when the fan is bound up with the motor not turning. A blown fuse will often be the first indication of a fan bound up.

Apr 14, 2012 | BMW Mini Cars & Trucks

2 Answers

2001 Jeep Laredo has 2 fans at the radiator - are both fans supposed to run all the time?

The answer to that is NO!
There are two fan motors on that area. One is for the radiator cooling system and the second is for the condenser( Airconditioning system ).
The radiator fan starts/run when the engine temperature reaches a certain temperature( electric thermo switch on the radiator ), while the A/C fan starts whenever you switch on the a/c.
Hope that clears up everything.
Thanks for asking FixYa!

Aug 13, 2011 | 2001 Jeep Grand Cherokee

2 Answers

I have a 1999 Grand Prix. It has a new water pump, new thermostat, new radiator cap, new hoses top and bottom off the radiator. Car is still running hot after a few moments. I don't hear no boiling...

Check to see if your electric fans turn on. Your fans are there to help cool the engine as well. Depending the setup will depend when they come on. Usually they are set turn on when your engine reaches a certain temperature to assist cooling the engine.

Jul 22, 2011 | 1999 Pontiac Grand Prix

2 Answers

2004 Pontiac Grand Prix is running warm about halfway. When I'm driving around it stays below half, but when I stop it heats up over half. then the fan turns on. Could this be a fan sensor? Is it not...


May 09, 2011 | 2004 Pontiac Grand Prix

1 Answer

I have a 2005 Pontiac Grand Prix my cars fluids are all ok but its overheating. Put in a new thermostat and it is still running hot. The radiator cooling fans will not turn on where do i start?


Mar 31, 2011 | 2005 Pontiac Grand Prix

1 Answer

Need to replace my water pump do you have a diagram

5.3L Grand Prix Engine
  1. Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.
  2. Remove the battery from the engine along with its tray.
  3. Take the drive belt out of the engine.
  4. Loosen and remove the three bolts to the water pump and remove the pump, throwing away the gasket.
  5. Clean the gasket mating surfaces and install the new water pump with a new gasket, tightening the bolts to 89 inch pounds (10 Nm).
  6. Reinstall the drive belt and the battery with the battery tray.
  7. Refill the engine's cooling system with coolant. Start the car and check for leaks when the engine reaches normal operating temperature.
3.5L Grand Prix Engine
  1. Partially drain the coolant from the cooling system.
  2. Disconnect the surge tank outlet hose and remove the drive belt.
  3. Remove the idler pulley and the water pump pulley, making sure to note the locations of the bolts as you remove them as they are various lengths.
  4. Loosen and remove the bolts to the water pump, also taking note at their locations, and remove the pump.
  5. Install the new water pump with a new gasket, tightening the bolts to 124 inch pounds (14 Nm).
  6. Reattach the water pump pulley, tightening the bolts to 106 inch pounds (12 Nm).
  7. Reinstall the idler pulley, tightening the bolts to 37 foot pounds (50 Nm) and install the surge tank hose and drive belt.
  8. Refill the engine's cooling system with coolant.
  9. Start the car and check for leaks when the engine reaches normal operating temperature.
3.4L and 3.1L Grand Prix Engines

  1. Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.
  2. Disconnect the negative battery cable.
  3. Remove the accessory drive belt guard and the accessory drive belt.
  4. Loosen and remove the water pump pulley bolts and remove the water pump pulley.
  5. Remove the water pump bolts and remove the water pump.
  6. Install the new water pump along with a new gasket, tightening the bolts to 89 inch pounds (10 Nm).
  7. Reinstall the water pump pulley and tighten the bolts to 18 foot pounds (25 Nm).
  8. Reattach the accessory drive belt with the drive belt guard.
  9. Refill the engine's cooling system with coolant.
  10. Start the car and check for leaks when the engine reaches normal operating temperature.

Dec 31, 2009 | 1999 Pontiac Grand Prix

3 Answers

The radiator cooling fan is not working. Upon

assuming fuse and relay are fan should be running when the engine is cool/cold, the only time the fan should be running when it reach over operation temperature which then the fan kick on to bring the temperature back down to it operation temperature. both fan work in sync with one another, addition cooling is needed when the ac is running. when the last time have you replace thermostat and Thermos sensor/switch. I would replace both unit if you have not done so. The thermos/switch will turn the fan on when it reach certain temperature and cut off when it sense the temperature drop in the engine.

Aug 25, 2009 | 1999 Lincoln Town Car

2 Answers


Ok, a couple of tries. 1, make sure the electric fan runs. 2, when engine is running at normal temperature, feel across the whole radiator, if you feel cool or cold spots, clogged radiator and replace it. 3, if it overheats quickly, possible headgasket failure, have a shop do a block test to confirm. Hope it is not #3

Mar 27, 2009 | 1997 Pontiac Grand Am

1 Answer

Overheating 97 V6 pontiac grand am

1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Belt Incorrectly routed, adjusted, tensioned, missing, or worn water pump belt(s). grey_line.gif 3 Inspect Oil Pan Gasket - Performance Ruptured, cracked or leaking radiator hose. grey_line.gif 4 Inspect Radiator Cap Worn or damaged radiator cap grey_line.gif 5 Inspect Thermostat Thermostat stuck closed grey_line.gif 6 Inspect Fan Blade Broken, missing, or defective fan blade(s). grey_line.gif 8 Inspect Water Pump Damaged, worn or leaking water pump. grey_line.gif 9 Inspect Intake Manifold Plenum - Perform Leaking water pump gasket. grey_line.gif 10 Inspect Cooling Fan Control Faulty cooling fan control or circuit. grey_line.gif 11 Inspect Cooling Fan Switch - Radiator Faulty radiator cooling fan switch or circuit. grey_line.gif 12 Inspect Engine Temperature Sensor Faulty engine temperature sensor or circuit. grey_line.gif 13 Inspect Temperature Switch Damaged or faulty temperature switch or temperature switch circuit. grey_line.gif 14 Inspect Fan Clutch Worn, loose or faulty fan clutch. grey_line.gif 15 Inspect Ported Vacuum Switch Damaged, leaking, or faulty ported vacuum switch. grey_line.gif 16 Inspect Radiator Obstructed radiator core or radiator cooling fins. grey_line.gif 17 Inspect Head Gasket - Performance Head gasket leaking coolant into cylinders

Dec 01, 2008 | 1997 Pontiac Grand Am

Not finding what you are looking for?
1997 Pontiac Grand Prix Logo

389 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

76848 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8582 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides