Look under the rear of the truck on the left side frame rail. The wire for the back up lights is light green. The brake/turn signal wire on the left side is yellow. The brake/turn signal wire on the right side is dark green. Your taillights and bumper lights are a brown colored wire. You also have a black ground wire. I ; those are the wire colors for the rear lamps on my truck anyways. I own a similar Chevy truck. Good luck.
I ran into one that may shed some light. The brake light switch harness get damaged from the poor position it is in. It is a real mother to get at too. Post your results.
I had the same thing on my '91.It was a headlight switch
the connection between the battery and the brake lights
A bad brake light switch, and it is bolted to the steering column in under the dash.
if the tail lights work but not brake lights then its most likely just a blown fuse or it could be the switch at the top of your brake pedal arm.
If emergency brake is on 1 click it turns daytime running lights off. Pull out on emergency brake handle and see if this fixes the problem.
push your parking brake one click and it will turn them out
what does it mean if my brake light is blinking on and off when its pushed down in my 1999 Chevy silverado
Brake lights indicate when a vehicle is about to stop. When brake lights stop working it is important to check the wiring, the fuse, and the light itself. It could be that any of those need to be replaced.
Yes they indeed have brake lights...
Check the brake light switch. It should be mounted on the upper part of the brake pedal or the brake pedal frame. If the brake lights go off when you unplug it you have a stuck or shorted switch.
On my 03 Chevy Silverado I just added brake fluid and the message turned off.
Change brake light bulbs Just remove the rear license plate. You can change the backup lights and brake light easily.
Bad stop light switch? Located at the upper end of the brake pedal under dash area
daytime running light module under drivers side dash
a 2003 Chevy silverado taillight bulb uses a 3157
need to find out how to replace a power brake booster in a 2002 Chevy silverado 2500 HD
Start with checking the fuses and bulbs. See sources and related links below for bulb information.
top of brake pedal
Mine was found on the stearing column near the brake pedal. Changing it did not solve my problem. Neither brake light in the fenders work. The brake light on the cab works. The courtesy lights do not work when I open the doors. The courtesy lights work when I use the remote to unlock the doors. We checked all fuses, lights. They are all good. My Chevy dealer has never heard of this problem but was willing to check it for a hefty fee.
Tail lights. Brake lights. Backup lights. Signal lights. License plate lights.
Check the bulbs,if not the bulbs you most likely have a bad ground.
Open tailgate. Remove 2 torx screws in side of taillight. wiggle taillight out, Remove hex screws that hold bulb assembly in taillight. change bulb, Reassemble
Blown fuse or defective brake light switch.