GMC Envoy Turn Signal Switch Replacement

My Envoy does something that is pretty annoying.  It keeps the high beams on all the time and while driving at night I am just blinding other drivers on the road.  Since I’ve been going through a whole other bunch of issues with the truck, I was putting off this repair thinking that I would just get rid of the truck.  However, I hate car payments and I don’t really have enough cash on hand to actually buy another car so I’ve decided to fix this issue.

The issue is actually the switch itself, if you hold it back a little you can keep the high beams off but who wants to drive like that all the time?  So I purchased a new switch, this is how you put it in.

Be prepared, this is actually much harder than anticipated!  I was under the assumption that I could just break apart the steering column plastic pieces and access the switch that way, but that is not the case.  The steering wheel needs to come off as well as the gauge shroud to get to the switch.

The first thing that you will need to do is to disconnect the battery!  This is no joke, you will need to remove the air bag so I you want to pull power from the vehicle so that it does not go off. So remove the two connections to the battery with an 8mm socket or wrench.

Negative Battery Terminal
Positive Battery Terminal

I also removed the fuse that controls the air bag just to be on the safe side. Open the fuse box by following the instructions in this post. Then remove the fuse as indicated below.

Wait 10 minutes to make sure there is no power left in the system and that the capacitors discharge.  I’m not sure you really need to do this, but I don’t want that airbag going off.

While you are waiting for the battery and capacitors to discharge, you can remove the plastic pieces that are blocking your access on the driver’s side.

Remove the two 7mm bolts from the plastic “bar” that is on the bottom.  Let the bar fall and just rest there. 

This will reveal two more bolts on the bottom.

Remove those two bolts.

Pop out the two plastic covers, using a flat head screwdriver, that are hiding another two 7mm bolts and remove them as well.

One Of The Revealed Bolts

You will now be able to remove that big plastic piece.  Put it to the side.

There are four Phillips head screws that need to be removed so that you can take out the instrument cluster shroud in the step below.  Just remove the screws for now.

Lower Shroud Screws
Left Side Upper Shroud Screw
Right Side Upper Shroud Screw

Now you will need to pop out the airbag.  There are two round pin holes that you can stick a small poker (I used a small allen key) into to release the clips that hold the air bag.  I did not stay in front of the airbag while doing this, and I did the passenger side first and then the driver’s side while not sitting in the seat.

Driver’s Side Air Bag hole
Passenger Side Air Bag Hole
You can see here that I tried to do this without popping out the airbag….

Once the clips are released, you can pull the airbag out.  I did not disconnect the electrical connections; I kind of just tilted it out of the way.

Next you will loosen the bolt that holds the steering wheel on.  It is a 21mm bolt and a normal ratchet will suffice.  Remove the bolt and pull off the steering wheel.  You may need to wiggle it a little bit to get it to come loose.

Once it is loose, you can pull it off and remove the cluster shroud from the instrument cluster.  When you have the shroud pulled out, you can pop the steering wheel back in place and work on removing the plastic covers around the switch.

You can see the plastic piece that is around the switch that I want to replace in the picture above.  This piece has a screw in it but I have no idea how you would get to it.  I just pulled the plastic apart and removed the top piece.  The bottom piece was left in place because of the steering wheel adjustment lever being in the way.

The switch is held in by two torx screws.  One screw is on the top and one on the bottom.

Top Torx Screw

Once you have the switch unbolted, you will see that there are a whole bunch of electrical connections going to the back of it.  Remove the 3 connectors that are actually on the switch, and unplug the lone connector that is not on the switch.

Get your new switch and plug in all the connectors.  The installation is the exact opposite of the removal.  Leave the battery and fuse replacement for last!

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