How to change a turn signal switch on 04+ Pontiac Grand Prix

Picture of How to change a turn signal switch on 04+ Pontiac Grand Prix
So there comes a time in all cars lives when things start to break down.
Most recently my 2005 Grand Prix decided to start flashing its high beams when ever it felt like it.
After some basic trouble shooting, I discovered the turn signal switch was defective. 

As most people do, I turned to my trusty service manual.
Much to my Surprise, I discovered a very lacking  "take it off, Put it back on" description.
I Googled and Forum hopped searching for a simple "How To" but found nothing specific to my year. 

This motivated me to make my first Instructable.

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Step 1: Gather your supplies

Picture of Gather your supplies
You will need the following.

1. Screwdriver with removable bits 
2. 90 degree ratcheting screwdriver 
3. T-25
4. Two plastic cards 
5. The new combination switch 

I bought my switch from

I opted for the AC Delco switch. I figured the factory switch lasted for 155XXX miles, so why not replace it with with another Delco switch

Now the ratcheting screw driver model I have is old, however the the part number is still valid with Craftsman just the head head slightly changed.

Step 2: Disable the Air Bag

Picture of Disable the Air Bag
It is HIGHLY RECOMMENDED to Disable the Air bag.
Your face is about to spend some close personal time with the steering wheel.
You don't want that system live while you are fiddling around near the air bag. 

Locate the Fuse Box under the hood.
The Air Bag Fuse should be listed as SIR.
In my fuse box it was the number 9 fuse.
There should be a fuse puller located in the box.
The fuse puller simply slides over the top of the fuse, 
With a firm pinch of the puller and a tug straight back should remove the fuse.

If you are missing a fuse puller a pair of needle nose pliers works too.

notsean11 month ago
You forgot to hook the airbag back up.....
manymarius1 month ago
Thanks a lot. For once a fix was fairly quick, easy, AND it worked. You have to carefully manhandled a couple of pieces, like the top of the steering column cover, but it worked. And i didn't even break anything.
lookout632 months ago

I replaced switch ok, but cannot get top cover to go over hazard switch and into proper position to latch. I can get it over but it's tight and the hazard switch isn't free to move up or down freely? Help....

DaveG62 months ago

I found it easier to drop the bottom shell down, put the top one on, and then 'raise' the bottom one up, hooking the back part of it first.

The turn signal also has a plug wire that runs down the wiring harness and plugs half way down. It's a pain to get pulled out and you need to push something into the edge of the plug to release the holder for it.

Removing the knee plastic and I concur with.

dougsisson2 months ago

One more thing that I didn't see in the write up. Putting the two halves of the clam shell back together properly requires successfully joining the simple stud-and-hook hinges together toward the back of the shells. The first time I tried I didn't get this to happen. It seems like the shells would stay together okay w/o doing this, but once I got the hinges together, the shell was much firmer.

dougsisson2 months ago

I will add that partially removing the plastic dash piece that faces your legs while in the drivers seat helped me when getting the clam shells back together. Carefully pry the triangular shaped end piece off the left side of the dash assembly which exposes the upper left screw. Then the other two screws are on the bottom of the plastic piece. I left the final screw which seems to be behind the rubber thingy under the ignition switch (that keeps the keys from scratching up the hard plastic).

dougsisson2 months ago

You sir are my savior!! Just finished the job in a little less than 1 hour. My '08 Grand Prix has been flashing sporadically since last winter. But since it has started getting cold this past fall, the hi-beams started engaging about half the time. I had to disconnect the high-beam bulbs for a while until I had a chance to fix this. Yours is the only walk through I could find for this job. It would have taken me quite a while to realize that those holes in the bottom clam shell have nothing to do with removing them. And the low-profile ratchet suggestion saved me aggravation since I would have stopped everything and searched for mine in a annoyed rage (searching for tools once a repair starts really irks me). Instead I looked for it a few days ago and had it ready to go. Great job!

emergingkurt3 months ago

Great instructions! The clam shell steering column cover was hard to get back together. Took about 2 hrs

FosterC13 months ago

Great rundown; thanks for the instructions!

Excellent instructions! Helped me out alot!

oliviat7 months ago

Thanks for this info! Very good details with pictures. I've been having this problem for over a month and it's too expensive to get done by someone so I'm gonna give it a try myself.

jhaslam1 (author)  oliviat7 months ago
Glad I could help. If separating the column cover gives you too much trouble you can remove the lower kick panel to give more room. The kick panel has a few screws hidden behind the side cover by the door, behind the radio trim and at the bottom.
oliviat jhaslam17 months ago

I just ordered the part so I'll dig into it next week. I have an 2006, every thing looks the same so far, I haven't looked at the fuse boxes just yet. It really sounds like that column cover gave you a run for your money.

jhaslam1 (author)  oliviat7 months ago
It was a pain because I was trying not to take everything apart and hadn't done a switch with out pulling the wheel before. In the end it wasn't so bad. Just take it easy and you'll get it.