FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

Home >> Chevy Truck >> 1990 >> Suburban 1/2 Ton 2WD V8-350 5.7L >> Repair and Diagnosis >> Brakes and Traction Control >> Power Brake Assist >> Vacuum Brake Booster >> Testing and Inspection >> Delco-Moraine Brake Boosters >> Slow or No Release

Slow or No Release

1. Faulty pushrod adjustment.
2. Binding linkage.
3. Blocked passage in power piston.
4. Air valve sticking shut.
5. Broken piston return spring or air valve spring.

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