20 Most Recent 1999 Pontiac Montana - Page 2 Questions & Answers

You can try performing a diagnostic self-test of the DIC.

In order to perform the diagnostic self-test and reset the driver information display, simultaneously press the following buttons for at least 2 seconds :

The reset is acknowledged with the display showing all segments ON for 1 second . You may only reset the following modes. The reset affects all 3 of these modes simultaneously:


If all of the segments light as described above, but the same symptoms are still present follow these instructions:

Symptom: Driver Information Center (DIC) Always Displays Dashes

1. Check for a poor connection or an open in circuit 800 (Tan wire) between the DIC connector terminal 15 and the Powertrain Control Module (PCM) connector C1 terminal 15.
2. If a problem is found with the circuit in step 1, repair the circuit and retest. Otherwise continue to step 3.
3. Replace the DIC and retest

1999 Pontiac... | Answered on Nov 10, 2015

key FOB has a bad switch so you have to find a new one. New one will need the micro switches matched to the old one.

1999 Pontiac... | Answered on Jul 14, 2015

Have you checked under the dashboard yet? Today's cars and trucks have two fuse boxes. The first is on the driver's side of the vehicle, usually under the kick flap to the left of the brake pedal. There should be a pop-off cover or box located on the firewall that contains a number of fuses. It isn't likely to be a fuse fault, though.

It sounds like you are experiencing problems with a thermocouple style switch. In other words, when the the switch or device reaches a certain temperature, it switches off.

To find this particular device, you will have to obtain a service manual for the electrical and fan systems and then you will have to find the diagrams that cover the fan. Study them and you will likely find that there is a special symbol there that shows there is a heat-activated or thermocouple switch. If you identify it and feel comfortable handling the job, remove the old switch and swap in a new one. The chances are good that this is the whole problem. I honestly doubt it was a fuse in the first place.

One other suggestion is this, look to see if there might not be a cooling system switch that handles this function. You'll need the service manual for that, too.

1999 Pontiac... | Answered on Jul 02, 2015


1999 Pontiac... | Answered on Jun 12, 2015

It is in the instrument panel fuse box , Fuse Block
Right side of the IP, in the right front door opening
STOP LAMP 15A - Stop Lamp Switch to Stop Lamps

1999 Pontiac... | Answered on Jun 07, 2015

code p0452 refers to evaporative emission ( EVAP) pressure sensor--low input ===causes wiring short to ground--EVAP pressure sensor---ECM
check for wiring problems from chewed wires form leaving it unattended
check replace the pressure sensor.

1999 Pontiac... | Answered on Apr 18, 2015

Check your bulbs sound like one is burnt out, or it is not properly grounded. Good luck.

1999 Pontiac... | Answered on Mar 29, 2015

There is no reset switch. Check the wires that connect to the fuel pump. Most likely your wires are not making contact

1999 Pontiac... | Answered on Mar 13, 2015

Do the other locks operate by keyless remote? I ask this to eliminate the possibility of the issues lying with your batteries in the key fob? If not you might have to use the key in the passenger door.or the back hatch?

If you need further help, reach me via phone at https://www.6ya.com/expert/james_8f14c50d9c6cdea8

1999 Pontiac... | Answered on Mar 07, 2015

There usually is a drain petcock on the bottom middle or end, however the are now made of plastic and if they break it is a hassel to find a new one and then you may have to pull the radiator to get at it so I usually pull a end off the lower hose.

1999 Pontiac... | Answered on Feb 28, 2015

Most common failure on this van is the key transponder goes bad and sets a security code.

1999 Pontiac... | Answered on Feb 18, 2015

The exact location of the thermostat varies depending on the particular engine model on your Pontiac Montana. Although 2.0L turbo and non-turbo engines locate the thermostat on the upper section of the engine, other models may follow the lower radiator hose to a lower position on the engine, requiring the removal of one or more components for replacement. see below

  • Park your car in a safe place and open the hood.
  • 2Locate the thermostat housing by following the upper or lower radiator hose from the radiator towards the engine. The end of the hose should be connected to an aluminum or metal housing attached to the engine by two mounting bolts.
  • 3Remove the air cleaner duct assembly and the crossover exhaust pipe, if necessary, using a wrench and ratchet and socket.
  • 4Place a drain pan underneath the radiator drain valve. Open the valve and drain some of the coolant to empty the radiator hose; then close the valve.
  • 5Remove the radiator hose from the thermostat housing by disconnecting the clamp using a pair of rib joint pliers, Phillips screwdriver or ratchet and socket, depending on type of clamp used on your particular model; then remove the hose.
  • 6Remove the two thermostat housing bolts and lift the housing off the engine. Before removing the thermostat off the engine, pay careful attention to the position of the relief valve on the thermostat in relation to the mounting base on the engine, looking for any special marks. The new thermostat has to be mounted in this same exact position. Also, note that the thermostat spring has to point towards the engine once it is seated on the engine; then remove the thermostat and any gasket material if necessary.
  • 1Clean the thermostat housing and engine mounting surfaces from gasket material, if necessary, using a plastic scraper; also, clean the bolt threads of the thermostat housing bolts of sealer, if necessary, using a wire brush.
  • 2Apply a light coat of Room Temperature Vulcanizing (RTV) sealer to the new paper gasket if your particular model requires one; or install a new O-ring to the center of the thermostat; also, apply a light coat of RTV sealer to the threads of the thermostat housing mounting bolts.
  • 3Install the new thermostat on the engine mounting base in the same exact position as the old one; install the paper gasket if required and set the thermostat housing in place. Start the housing mounting bolts by hand and then tighten the bolts.
  • 4Connect the radiator hose to the thermostat housing; then install the crossover exhaust pipe and air cleaner and duct assembly, if necessary. Fill the radiator with new coolant, start the engine and let it reach operating temperature. Check for leaks and add more coolant to the reservoir to bring the level between the Add and Full Hot marks and turn off the engine.
  • 5Bleed the cooling system if the thermostat housing is provided with a valve screw on it. Once the engine reaches operating temperature, loosen the valve screw until coolant begins to leak through the screw; then tighten the screw again

Read more: How to Change a Pontiac Montana Thermostat ' eHow.com http://www.ehow.com/how_4900141_change-pontiac-montana-thermostat.html#ixzz1eRUgRlYC

1999 Pontiac... | Answered on Feb 15, 2015

Mufflers are located towards the rear of the exhaust system. The 1st canister in the system is the catalytic convertor.

1999 Pontiac... | Answered on Feb 10, 2015

first the code P01374 does not exist it's P0374 or P1374

1999 Pontiac... | Answered on Feb 06, 2015

you have a GM common problem and that is a bad intake manifold gasket. GM change the gaskets to plastic and they crank and leak causing over heating. here is a picture of one i took from a 2005 pon. bonneville with 74,000 miles on it2_12_2013_3_00_09_am.jpg

1999 Pontiac... | Answered on Feb 04, 2015

You cannot disable that system. It is integrated into the entire operating system. The computer will not enable the injectors unless it first receives the correct signal from the PassKey III system.

1999 Pontiac... | Answered on Jan 02, 2015

You will have to go to the dealer so they can cut you a new key and program it, good luck.

1999 Pontiac... | Answered on Dec 30, 2014

Sorry but you will have to go the the dealer and have them cut and program a new key, good luck.

1999 Pontiac... | Answered on Dec 30, 2014

Sender is either stuck or has a bad connection on it but you will have to test the wiring and gauge to be sure.

1999 Pontiac... | Answered on Dec 30, 2014

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