1993 gmc 1500

Asked by Mar 30, 2017 at 08:18 PM about the 1987 GMC C/K 1500 Series

Question type: Maintenance & Repair

When my headlights are on my brake lights lite up but do
not get any brighter when the pedal is pressed does
anyone know anything about this they also don't work at
all when lights are off?

4 Answers


Make sure there is the right bulb back there it should be a 2 filament bulb. You turn on your lights and thats the power for the tail lights coming on back there.

My brake lights do not work while headlight switch is off and only stay one brightness when the switch is on.


I know, check to see if there is a 2 filament bulb in place there.

Ok thanks

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