#1: check the fuses!!!! you could save yourself a big headache if it's just a blown fuse
Check the bulbs if they are good check the grounds for the lights.
in the fuse box
What fuse controls the brake lights on a 1998 Chevy Camaro? It should be labeled on the fuse block.
the connection between the battery and the brake lights
BEHIND THE BRAKE PEDAL
If the brake lights do not work on Chevy Venture van 2000, try to disconnect the brake switch. Then short the two contacts of the connector to check if the brake lights are now working.
turn signal switch needs replaced!
Check the fuse
faulty brake switch
Yes they indeed have brake lights...
If the brake lights on your Chevy Colorado are not working, start by checking the brake light bulbs to see if they need replacement. Next, inspect the fuse related to the brake lights, as a blown fuse can cause them to fail. Additionally, examine the brake light switch, usually located near the brake pedal, as it may be faulty or misaligned. If these steps do not resolve the issue, consider consulting a mechanic for further diagnosis.
If the turn signal is working it's either the brake light switch or the turn signal switch.
there was a recall on the brake light switch you might want to check into that