Operation CHARM: Car repair manuals for everyone.
Home >> GMC >> 2000 >> K 2500 Truck 4WD V8-5.3L VIN T >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Air Pump Relay
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Air Pump Relay

The scan tool displays ON or OFF. The scan tool displays ON when the PCM grounds the AIR pump relay control circuit. The scan tool displays OFF when the PCM disables the ground circuit.
pro multis · About Operation CHARM