P1658 GMC – Starter Enable Relay Control Circuit

P1657 GMC – 1-4 Upshift Solenoid Control Circuit

P1656 GMC – Driver 2 Line 6

P1654 GMC – Cruise Control Inhibit Output Circuit

P1653 GMC – Oil Level Lamp Control Circuit

P1652 GMC – Powertrain Induced Chassis Pitch Output Circuit

P1650 GMC – Control Module Output B Circuit

P1651 GMC – Fan 1 Relay Control Circuit

P1647 GMC – Driver 1 Line 7

P1644 GMC – Traction Control Delivered Torque Output Circuit

P1645 GMC – Evaporative Emission (EVAP) Vent Solenoid Contorl Circuit

P1643 GMC – Engine Speed Output Circuit

P1640 GMC – Driver-1-Input High Voltage

P1637 GMC – Generator L-Terminal Circuit

P1638 GMC – Generator F-Terminal Circuit

P1636 GMC – PCM Stack Overrun

P1634 GMC – Ignition 1 Switch Circuit

P1630 GMC – Theft Deterrent Learn Mode Active

P1628 GMC – ECT Pull-Up Resistor

P1627 GMC – A/D Performance