I am having a brake issue in My 82 GMC van. when I press on the brake, normally it will be firm, other times it will start firm, then go to floor slowly, setting the brake light. when this occurs, I press down hard, and light goes out. do I have something to worry about????




I'm not liking the sound of that Jeff. Have you checked top to bottom for leaks in hydralics? Resevior to bleeder screws.
Jamie
2007 Ford E250(Work van) (Ya, Ya, shut up!)
1996 GMC Sierra SLE 1500 5.7L/4L60E
http://www.thefundumpster.com



Air in the lines,
Leak in the lines,
Leaking master cylinder,
All dangerous and should be corrected immediately.
Look for wet spots near any brake part, lines.
Then fix.
Technology is great, when it Works,
And one Big Pain in the Ass When it Doesn’t.
Detroit Iron Rules, All the Rest are Just Toys.
94 GMC Burban, 5.7L (350), 4X4, Auto
86 GMC Burban, 350, 2 WD, Auto
79 GMC pickup plow truck, 400, Full time 4X4, Auto
86 Pontiac Fiero SE, 2.8L, Auto, only mid engine American car
See a Pattern yet?
15 year GM assembly line worker.



To me it sounds like bad master cylinder.
Patrick
Rhode Island
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