I've had this problem for over a month now and need to fix it. I actually have a 2000 S10, but figured the problem would be similar in a Blazer. Ok, so my brake lights usually stay on all the time. The way I get them to go off is to keep tapping on the brake pedal till they go off (or until my hazard lights start flashing, cause when the brake lights are stuck on, the hazard lights don't flash). Sometimes they don't turn off at all, so I disconnect the ground on my battery in this case. I've tried to research my problem on the net (and this lead me here) and it seems that I need to possibly replace my brake light switch, but I don't exactly know how to do that (or where it is, I think under the dash by the brake pedal?). So if anyone has any solutions to a fix, pleeeaaase let me know. Thanks.

 

It's attatched to the brake pedal above the knee bolster (or hush panel). Locate the switch on the pedal, remove the outer clip, slide the switch out from the pedal ( with the rod). Install the new switch and clip it on.

 

Ok, I finally replaced the brake light switch (which was about $8), but my tail lights still stay on. Any ideas? I'm gonna try one more thing: replace both tail light bulbs. If that doesn't work, I'll take it to a shop or something and let someone else figure it out...

 

So now your tail lights stay on?
Originally you said the brake lights stay on.
Do the tail lights and headlights stay on or just the tail lights?

 

If it is the brake lights, is the high mount stop lamp illuminated as well or just the lower turn/tail/brake lights?

 

Did you adjust the brake light switch properly?

 

Yea, it's the brake lights that stay on. And no, the high mount brake light on the cab doesn't stay on. So I'm thinking it really might be the bulbs since this all started after I changed one of the bulbs. I'll try that and let yall know. Thanks again!

 

Hey.. I removed the hush panel and everything like that, squeezed up under there and found the brake switch. I couldn't get that aluminum clip/shield off of it,i sat there prying with a flat head and trying anything, only thing ican get it to do is spin around in circle which obviously doesn't do me any good. Any tip for how i can get this damn brake switch out.