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Home >> Pontiac >> 1971 >> GTO Base, 6.6L Eng, Eng CD WS, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control Testing >> Programmer Servicing >> Programmer Component Replacement >> Vacuum Checking Relay

Vacuum Checking Relay

Identify all vacuum hoses and relay ports to ensure correct reassembly, disconnect two hoses from vacuum valve at the relay. Disconnect long vacuum hose from other side of relay and disconnect short vacuum hose (same side of relay) at vacuum motor port. When installing valve, connect ail hoses in same order.

CAUTION: If long (white stripe) hose from checking relay to transducer is replaced, replacement hose must be at least 15" long. Transducer operation will be noisy if shorter hose used.
Fig 1: Programmer Checking Relay Removal
G09311455Courtesy of GENERAL MOTORS COMPANY