8th gen turn signal/dimmer switch replacement - Chevy Impala Forums
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post #1 of (permalink) Old 08-08-2013, 04:22 PM Thread Starter
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8th gen turn signal/dimmer switch replacement

Common issue I have found with our 8th gen vehicles, after awhile the turn signal switch wears, and you find the highbeams coming on randomly when you use the signal. The fix is replacement, AC delco part is fairly cheap through rockauto, unlike it's 7th gen counterpart.

Lets get started. First tools, what I used: 1/4 driver, T25 torx bit, 1/4 end wrench, needlenose pliers (optional), and a small flatblade screwdriver.
First pull the tilt adjuster off, nothing holding it, just pull outward.
Remove the plug piece by the ignition switch
Remove the torx screw in the bottom of the column, front most hole. No idea what the others are for
Pull down the panel under the column, just a little, there are screws holding it at the bottom, but you just need a little room.
Remove the bottom column trim, just pop the clips apart at the front, then push back and wiggle, as shown it is held with hooks in the rear.
Remove the top trim, you have to finagle it around the ignition switch a little.
Remove the top torx screw holding the switch.
Now the lower screw, this is where the wrench comes in. There is no clearance without removing the wheel, I find this may be a serious pain, but easier than removing the wheel. The pliers come in here as well, once the screw is loosened you can turn it easier with them.
Pull the switch off the column.
Remove each of the 3 plugs using the screwdriver on the tabs.
And that's it! Put everything back together in reverse order. The column trim is a serious pain to get back in place, but be patient and look closely, and you'll get it.

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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post #2 of (permalink) Old 08-09-2013, 10:58 AM
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Excellent write up!

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post #3 of (permalink) Old 08-09-2013, 01:26 PM Thread Starter
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Thank you.

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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post #4 of (permalink) Old 08-09-2013, 02:31 PM
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Just curious - what are all of the switches mounted on your radio bezel?? Just being nosey! :-)

Thanks.
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post #5 of (permalink) Old 08-12-2013, 11:40 AM Thread Starter
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Security patrol car, they control the lights and whatnot. The red button is the airhorn.

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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post #6 of (permalink) Old 08-14-2013, 08:12 PM
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Tanks !

Bookmarked it too.

Some things are better left unsaid, which I generally realize right after I have said them.
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post #7 of (permalink) Old 12-06-2014, 12:55 PM
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Would this fix the issue on the blinker/hi beam headlight switch? I have an issue of the high beam coming on by itself so i have to hold the blinker towards the steering wheel to keep the lowbeams on. Thanks for the excellent write up! This looks like what I need to do to fix the problem but wanted to double check with ya. Thx

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post #8 of (permalink) Old 04-25-2015, 01:29 PM
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wow

After reading this in full, I feel dumb about asking that question lol. thx for the write up!

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post #9 of (permalink) Old 12-17-2015, 05:56 PM
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Great write up!!
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post #10 of (permalink) Old 10-01-2016, 11:02 AM
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9th Gen Impala Differences 2006-2013 (2014-2016 Limited)

They made the 9th generation turn signal switch replacement even easier. You need a T25 torx bit and small screw driver. The tilt adjuster does not seem to come off and can stay on for this 9th gen replacement.
1. Remove the plug piece by the ignition
2. Remove the black T25 torx screw in the bottom of the column, front most hole.
3. Pull down the panel under the column, just a little, there are no screws holding it.
4. Here's is where it is different - The column trim top and bottom are snapped together. The bottom trim is not hooked in the rear. So pop the two pieces apart. Takes a little effort.
5. Work the top piece off the ignition switch to get it off.
6. The bottom piece just needs to be pulled down a little to expose the silver bottom T25 torx screw in the front. If you can get the tilt adjuster knob off you can take the bottom piece all the way off.
7. Here is the tip - you will need to turn the steering wheel 90 degrees to open a path to that silver bottom torx screw.
7. Remove the silver top T25 torx screw and then the silver bottom T25 torx screw. Pull the old switch up so you can remove the 3 plugs with the little screw driver

The only part that took some time putting the new unit back was snapping the top and bottom column trim pieces together. You have to get the top piece back over the ignition switch then get both pieces aligned so they will snap together. Takes some back and forth to get the correct alignment.
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