Brake Light Switch

Anyone know where I can find the brake light switch on a 1989 GMC Sierra 1500? My rear brake lights are constantly on. Don't know whether there's a switch (can't find one) under the brake pedal somewhere or something up on the master cylinder. Any help would be appreciated.

Thanks in advance.

jb.

Anyone know where I can find the brake light switch on a 1989 GMC Sierra 1500? My rear brake lights are constantly on. Don't know whether there's a switch (can't find one) under the brake pedal somewhere or something up on the master cylinder. Any help would be appreciated.

Thanks in advance.

jb.


Located top of brake pedal, unplug, unclip. should be easy except for having your head on the floor.