Operation CHARM
: Car repair manuals for everyone.
Home
>>
GMC Truck
>>
2000
>>
K 1500 Yukon 4WD V8-4.8L VIN V
>>
Repair and Diagnosis
>>
Powertrain Management
>>
Computers and Control Systems
>>
Engine Control Module
>>
Description and Operation
>>
Powertrain Control Module (PCM) Description
>>
PCM Function
PCM Function
The
PCM
supplies a buffered voltage to various sensors and switches. The PCM controls most components with electronic switches which complete a ground circuit when turned ON.