K 3500 Truck 4WD V8-379 6.2L DSL VIN J FI (1992)
Some high-mileage 1991-92 HYDRA-MATIC 4L80-E transmission wiring harness electrical connectors may crack or break when removing the valve
body assembly rendering the connectors inoperable. For proper transmission identification see Figure 1.
This could be the result of the electrical connectors being pryed off of their connection point with a screwdriver or other similar tool when removal of the
control valve body is required for servicing of a unit.
A distressed connector requires the replacement of the entire wiring harness assembly. For connector location see Figure 2.
When removing the valve body assembly, to prevent connector distress, do not pry them off their connections. Instead, disconnect the main electrical
connector from the transmission case and remove the entire wiring harness assembly with the valve body. Avoid removing the electrical connectors
unless the procedure is absolutely necessary (i.e., replacement of the wiring harness).
