why is third brake light not working?

Asked by Candi Sep 28, 2020 at 12:13 PM about the 1999 GMC Sonoma 2 Dr SLS Sport 4WD Standard Cab Stepside SB

Question type: Maintenance & Repair

my third brake light on top the roof of truck has good bulbs, but light wont come
on when headlights are on

3 Answers

F_O_R answered 4 years ago

The third light is a brake light, not a tail light.

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beatupchevy answered 4 years ago

Are you saying it works except for when the headlights are on ? Bad ground ? Old worn sockets can do funny things .

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Candi answered 4 years ago

ok thank you ! good to know, brand new to this old truck.. still learning it

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