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Electrical: How To Replace Your Reverse Light Switch MU3

Old 07-21-2010, 11:48 AM
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How To Replace Your Reverse Light Switch MU3

There are a few of you that do not have any backup lights when putting your car in reverse. I hope this Helps! This is for the MU3 transmission and not the Getrag.

1. Go to your local dealership and buy GM part no. 24459626
2. You will need the following tools: 1/2 ratchet, long 1/2 extension, 22mm deep socket.
3. Shift your car into 4th gear. (please make sure the car is not running!!!)
4. Look down between your fuse box and your motor, you will see a plug with two wires on it. It will be right on top of the transmission. You might have to move some cables out of the way. However you will not have to remove or dissasemble anything!!!
5. Pull the plug off the old switch, then use the socket to remove it.
6. To install the new switch, do this backwards.

This only took me 10 minutes!
Old 12-21-2010, 01:32 PM
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how much did the switch cost you from the dealership?
Old 12-21-2010, 05:18 PM
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I think it was around $20.00
Old 12-21-2010, 05:20 PM
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How does this happen? Like.. not havin reverse lights???
Aside from Bulbs messin up.. or folk blackenin the **** out of em..
Old 12-21-2010, 06:04 PM
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from what i heard this is a common failing part
Old 12-21-2010, 06:52 PM
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I replaced mine on monday it took like 15 min. very easy unless you got big hands
Old 12-21-2010, 07:08 PM
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your reverse lights will not turn on when the switch goes out lol. dealer had to replace mine
Old 12-22-2010, 01:09 AM
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Yeah my dealer wanted $275 to replace the damn thing. 100 of it was the diagnostics, then the 23 dollar part, then the rest labor, i was like you have got to be ******* kidding me
Old 12-22-2010, 01:19 AM
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Awesome write up! Definitely a job for me in spring
Old 12-22-2010, 12:40 PM
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Originally Posted by sjc0013
Yeah my dealer wanted $275 to replace the damn thing. 100 of it was the diagnostics, then the 23 dollar part, then the rest labor, i was like you have got to be ******* kidding me
WOW $100. Considering how long it actually takes to replace it.
Old 12-22-2010, 02:59 PM
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It would be much appreciated if you could at least get a pic of the location.
Old 12-22-2010, 11:35 PM
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^^true, this, I'd like to know... When does it usually go out???
Old 12-22-2010, 11:57 PM
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I just ordered the part today, gonna attempt to put it on sometime soon, so megaman if you could snap a quick pic it would be most appreciated!!!

Originally Posted by MastaShaKe_88
^^true, this, I'd like to know... When does it usually go out???
mine went out a few weeks ago, i have an 07 with around 55k

Last edited by sjc0013; 12-22-2010 at 11:57 PM. Reason: Automerged Doublepost
Old 12-23-2010, 01:44 AM
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I'll try. It's kinda hard to take a pic of where it is located. Give me a day or two.
Old 12-26-2010, 02:51 PM
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Well, let me tell you that wasnt the most fun thing to do in 30 degree weather. But, atleast I have reverse lights now. It's really not that hard to find if you know where to look. Like megaman said, look directly down between your engine and fuse box, it straight down. You will definitely need a long extension, i just used the big ass one i use to change the oil filter.
Old 04-09-2011, 06:46 AM
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i like not having reverse lights! not
thanks alot man for posting this big help
Old 04-09-2011, 12:05 PM
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Originally Posted by sjc0013
from what i heard this is a common failing part
Not just for cobalts,
but EVERY Vehical I've EVER owned, has had this switch fail.
Old 05-06-2011, 02:55 AM
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can someone post a pic of where its exactly at cuz mine needs replaced
Old 05-08-2011, 11:09 PM
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Its pretty hard to get a picture of it, i can try tomorrow if i have time
Old 05-09-2011, 01:19 AM
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It is really hard to take a photo of the switch. I already tried to take a photo, but failed at it. You just don't have room for light. But like i said before, it is not hard to find. as long as you follow my instructions in the first post.
Old 05-09-2011, 11:39 AM
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^ this
Old 05-16-2011, 04:22 PM
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Just picked up an '06 ss/sc and the first night I had it I realized the reverse lights were out.. will order this part soon. Can someone post a picture of the actual switch and where its located.. I don't do well with descriptions.
Old 05-16-2011, 09:16 PM
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Instructions is pretty much all you are going get. It is very hard to take of a photo of this replacement.
Old 05-24-2011, 03:20 AM
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Curious, why 4th gear?
Old 05-24-2011, 03:24 AM
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i had to replace mine two months ago, easy 10 min job

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