1996 GMC C2500 Brake lights flash on then go off when pedal

Tiny
REMAKING
  • MEMBER
  • 1996 GMC C2500
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
I'm getting desperate. Haven't driven my pickup in six weeks. Can you help me?

I know this sounds pretty stupid, but I can't find the brake light switch on my '96 GMC truck, and my Chilton's manual is absolutely useless on this subject. Is there a mechanical switch under the dashboard at the brake pedal arm, (like on the '80's models), or is there a pressure activated switch attached to the master cylinder?

When applying the brakes, the brake lights illuminate for just a flash, then go off before enough pressure to work the brakes is applied. Please help!
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Friday, November 28th, 2008 AT 8:52 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Hi:
It could be either a switch on the pedal or a hydraulic switch.

Her are pictures of both. You'll be looking for one or the other.


https://www.2carpros.com/forum/automotive_pictures/249084_ppp80171003_1.jpg




https://www.2carpros.com/forum/automotive_pictures/249084_ppp80172003_1.jpg



Let me know if this helps.

Joe
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Monday, December 15th, 2008 AT 6:28 PM

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