C 1500 Truck 2WD V8-5.3L VIN T (1999)
Engine Control Module: Service Precautions
Overloading Circuits
The PCM is designed to withstand normal current draws associated with vehicle operations. Avoid overloading any circuit. When testing for opens or
shorts, do not ground any of the PCM circuits unless instructed. When testing for opens or shorts, do not apply voltage to any of the PCM circuits unless
instructed. Only test these circuits with a digital voltmeter J 39200, while the PCM connectors remain connected.
