K 3500 Truck 4WD V8-379 6.2L DSL (1985)
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Transmission Vacuum Regulator Valve: Service and Repair
1. Remove modulator attaching screw and retainer.
2. Remove modulator assembly from case and discard O-ring seal.
3. Remove modulator valve from case.
4. Reverse procedure to install, using a new O-ring seal.