09 Tahoe Brake lights stay on when truck is running.

[Tahoe_SSV]

So recently I've developed some issues. My traction control and service stabilitrac warnings have been coming up on DIC. usually they go away fairly quickly. But now my brake lights are staying on constantly. I know just by the way it is acting that problems with the transmission are arising. It has 155,000 miles so I figure it is about time for some attention to be given to the ol girl. If anyone knows what could be causing these issues, I would love some feedback...I have a 25,000 mile or 2 year extended warranty. So what should I do?

 

[swathdiver]

First, find out exactly what the warranty covers and does not cover.

Your brake light issue is probably the brake switch above the pedal. The part number is 25981009 or D1539J, both numbers on ACDelco packaging. Aftermarket units do not work right or last and don't even bother cleaning it. Never seems to work or last. $10.88 Delivered on Amazon right now.

I say this with the caveat that you ought to pull the codes first before firing the parts cannon. These codes probably reside in the BCM module so a typical code reader won't see it.

 

[Tahoe_SSV]

Do I take it to a shop and have them put a scan tool on it?

 

[Tahoe_SSV]

I did unplug the brake switch yesterday and the brake lights still stayed on.

 

[swathdiver]

Do I take it to a shop and have them put a scan tool on it?

Yeah, someone with a Tech-2 or Snap-On Solus or the like. Did you check the thread about Tech-2 owners and see if anyone lives near you?

 

[Tahoe_SSV]

No I havent... but I doubt that I could get that lucky. Lol

 

[Tahoe_SSV]

I changed the brake switch above brake pedal. That didn't do anything. Next step is take to shop I guess...I really hate having to pay someone 50-75 bucks an hour when I know that it is something that I can change myself

 

[Rocket Man]

I changed the brake switch above brake pedal. That didn't do anything. Next step is take to shop I guess...I really hate having to pay someone 50-75 bucks an hour when I know that it is something that I can change myself

Do you have aftermarket LED tail lights by chance? I would try a different set of tail lights regardless, to see if it’s a wiring problem or a fail light problem.

 

[Tahoe_SSV]

No they are stock lights.

 

[swathdiver]

I changed the brake switch above brake pedal. That didn't do anything. Next step is take to shop I guess...I really hate having to pay someone 50-75 bucks an hour when I know that it is something that I can change myself

Me too, that's why you have to have a Tech-2 or similar to work on these. There's a guy on here in New Hampshire, don't remember where and if he's on the map to help out.