What is cause of hissing sound in the cab and revving of the engine when I step on the brake pedal of my 1992 Chevy C/K 2500 V8 5.0 liter truck?

Asked by Jan 31, 2018 at 01:09 PM about the 1992 Chevrolet C/K 2500

Question type: Maintenance & Repair

2 Answers

134,945

Possible vacuum leak at the brake booster.

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