Left front turn signal bulb for 2001 Pontiac Montana

try changing the signal flasher. note the e-flasher looks the same. when you find a flasher turn on the e-flasher so you know you have found the signal flasher. they are usually in the same general area.

Open the hood. If you cannot gain access, the grill of the vehical will have to be removed. This will give you access to the bulb.

1. Open the hood.

2. Remove the front turn signal/parking lamp
assembly. See Front Turn Signal, Sidemarker and
Parking Lamps on page 5-46.

3. Pull the assembly away from the vehicle.

4. Unscrew the black retainer ring that holds the bulb
assembly in place.

5. Pull the bulb assembly straight up from the
lamp housing.

6. Unhook the electrical connector by lifting up the
blue tabs and pulling the bulb out.

7. Install the new bulb through the black retainer ring
and into the electrical connector.

8. Tighten the black retainer ring in place. Push the
bulb firmly enough so that the blue tabs hook over
the tab on the bulb.

9. Carefully put the bulb assembly back into the lamp
housing. Be careful not to damage the bulb on the
headlamp aiming bar.


Same guide is here in the manual along with pictures.

http://www.extendedgmwarranty.com/owners-manual/pontiac/2005-Pontiac-Montana.pdf

On page 370

I replaced the front right turn signal on my 2005 Pontiac Montana by reaching up from underneath. I tried removing the battery but the opening from above was too small. I was able to pull the ground effects open enough to get my arm in. When you reach the bulb holder feel for two wings on the bulb socket and give the whole socket a quarter turn to and it will release. The wires are long enough so the entire bulb holder will drop down below the vehicle so you can easily replace the bulb.
Reverse the step to put it back in. You will not be able to see what you are doing so I had someone guide me by watching from above. Took less than 10 minutes once I decided to change the bulb from the bottom. I did not need to jack the vehicle up or use ramps.

This may have more then one bulb in the front or possibly a bad socket try wiggling the new bulb in the socket to see if it will work.Compare all turn signal lights that come on the passenger side to those drivers side.Some vehicles also incorporate sidemarker lights with the turn signals.

Fog/Driving Light Bulb Size: 880
Here is the rest of the bulb size used in your Montana.
2000 Pontiac Montana Auto Light Bulb Diagram
Low Beam Headlight Bulb Size: 9004
High Beam Headlamp Light Bulb Size: 9004
Parking Light Bulb Size: 4157NALL
Front Turn Signal Light Bulb Size: 4157NALL
Rear Turn Signal Light Bulb Size: 3156
Tail Light Bulb Size: 3057
Stop Light Bulb Size: 3057
High Mount Stop Light Bulb Size: Assembly
Fog/Driving Light Bulb Size: 880
License Plate Light Bulb Size: 168
Back Up Light Bulb Size: 3156
Front Sidemarker Light Bulb Size: 194
Ash Tray Light Bulb Size: 558
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168
Dome Light Bulb Size: 562
Step/Courtesy Light Bulb Size: 168
Trunk/Cargo Area Light Bulb Size: 212-2
Daytime Running Light Bulb Size: 3157NALL
Thank you for using fixya.

1. Open the hood.
2. Remove the headlamp housing bracket bolt from the headlamp bracket.
3. Pull the headlamp inboard to disengage the headlamp tabs from the headlamp bracket slots.
4. Pull the headlamp forward to access electrical connectors.
5. Disconnect the electrical connectors from the headlamp.
6. Remove the headlamp from the vehicle.

Remove the park and turn signal lamp sockets from the lamp by rotating counterclockwise.

you may have a bad bulb or socket in the front or the back give these websites a try www.alldatadiy.com and www.autozone.com wish you the best of luck Michigan Man.

YOU HAVE A BLOWN LEFT SIGNAL BULB.REPLACE BULB.

I assumer you're getting a a "check left turn signal" error message too? The rapid flash is the car's way of letting you know you've got a bulb out. The front bulbs can be tricky since they're double filament. If one filament is out the light may look dim. Set the hazards on and inspect. Last time this happened to me on my 2001 S60, the bulb was fine and the socket was flaky. You may need to clean the contacts and check the resistance from the plug to the socket. Mine is working now - for the time being. I hope it's not your front bulb because you have to remove the air filter to get to it. Good luck!