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

1996 GMC C2500
250,000 MILES • V8 • 4WD • AUTOMATIC
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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!
Nov 28, 2008 at 8:52 AM
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JACOBANDNICKOLAS
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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
Dec 15, 2008 at 6:28 PM