C 2500 Truck 2WD V8-379 6.2L DSL VIN J FI (1992)
Shift Solenoid: Testing and Inspection
Shift Solenoid "A" Circuit Check
Shift Solenoid "A" Circuit
Circuit Description:
Shift solenoid "A" is attached to the valve body and is a normally open exhaust valve. The PCM/TCM activates the solenoid by grounding it
through an internal quad driver. Solenoid 'A" is "ON" in 1st and 4th gears, but "OFF" in 2nd and 3rd gears. When "ON," the solenoid redirects
fluid to act on the shift valves. Solenoid "A" is usually blue in color.
