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Home >> Pontiac >> 1972 >> Firebird Base, 7.5L Eng VIN T, Not Available Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Testing >> ATC Tester >> Testing Procedure

Testing Procedure

For test set connections and testing procedure, and programmer component replacement, refer to "General Motors Automatic Temperature Control Testing" in this section  .

Fig 1: ATC Vacuum Schematic - Catalina, Bonneville, Grand Ville
G09311765Courtesy of GENERAL MOTORS COMPANY
Fig 2: ATC Wiring Diagram - Catalina, Bonneville, Grand Ville
G09311766Courtesy of GENERAL MOTORS COMPANY
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