94 jimmy brake pump

1994 GMC JIMMY
150,000 MILES • 6 CYL • 4WD
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DEZIROSE
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Yesterday I noticed a strange noise coming from my engine when i applied the brakes, I pumped the break a few times and the noise stopped but would return if I went very long without breaking. When I killed the engine a mechanical noise continued and today my battery was dead. I think the break pump continued to run all night, is that possible and if so should replacing the pump fix it or is it a problem in the lines?
Mar 14, 2011 at 9:53 PM
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RASMATAZ
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Could be a problem with the ABS unit-draining battery have it checked for excessive parastic draw
Mar 14, 2011 at 9:58 PM
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CARADIODOC
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  • ASE Certified Mechanic
This is actually real common on GM trucks. Replace the shorted ABS computer. That's what runs the pump and isn't turning off.
Mar 14, 2011 at 10:18 PM
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