[Jeffery Thompson]

Hi when I push the brakes the lights don't come on however if I use the knob on the console they come on no problem. I changed the brake light switch but it had no effect.
Thanks for any help!!

 

[RayVoy]

There is no knob on the dash that turns on your brake lights. Maybe the cargo lamp; but not the brake lights

Check bulbs and fuses?

 

[battlebus]

Are the running lights working with the headlights or parking lights on, but brake lights are not working? If so, check fuses. That's where I would start. I don't know what type of light switch would be on a console.

 

[Jeffery Thompson]

Looking at the brake light diagram its labeled stop lamp switch...turning this will activate my running lights and the brake lights...I checked the fuses I thought relevent which were fine.
Could I have missed one?

 

[RayVoy]

Do you have, and know how to use, a voltmeter?

 

[Jeffery Thompson]

I can get a hold of one and know how. Were should I check?

 

[RayVoy]

Well, you need to start at the brake light switch, one wire should have 12v with key off.

If no 12v check toward the fuses, if you have 12v press the brake and look for 12v through the switch.

Keep brake pressed and follow the 12v to the lights.

If you lose 12v along the way you blew a fuse

 

[silverado002]

In addition to what Ray says, my 2002 Silverado diagram (possibly the same as your avalanche) shows the wire at the brake switch to be an orange wire that has constant 12Volts. I'm curious as to whether you have a CHMSL (center high mounted stop lamp) light? Does it come on with the brake pedal depressed?

 

[RayVoy]

Thanks Silver, I was going to look that up tonight!

 

[Ben_Jamin80]

My 07 had a similar problem but the reverse lights would not go out. Apparently, is was the fuse board somehow it was getting wet.