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How can replacing vacuum brake booster cause problems with engine and cruise control?

4wdbride4wdbride Posts: 1
edited September 2015 in Chevrolet
My husband recently replaced vacuum brake booster in '96 Chevy 1/2 ton, 4wd pickup. He is not a pro mech., but had done this before in our '96 Tahoe and had no problems after. But this time, not so good. Could not hardly get in gear(auto trans) and if set cruise and trying to come to stop...applying brake did not release cruise and engine rev'd, finally got it shut down thru neutral. Bled brakes again & seemed better at first, but then did same as before with cruise and this time it died. Maybe permanently! RPM elevated for just a few seconds. And ABS light on. Anything you can add would be so helpful. Anyone have any tips or experience with this? Need to keep cost of repairs as low as possible-financially stressed due to chronic health issues. Thank you.

Answers

  • thecardoc3thecardoc3 Posts: 5,119
    There are two inputs to the cruise control module that are controlled by the brake switches that should each be able to disengage the cruise control. The brake light switch also provides power for the shift interlock solenoid, was the transmission stuck in park?
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