Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2002AVALANCHE 1500 2WD V8-5.3L VIN TREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONPOWERTRAIN CONTROL MODULE (PCM) DESCRIPTIONGENERAL INFORMATION
2002 Chevrolet Avalanche 1500 2WD V8-5.3L VIN T
General Information
2002 Chevrolet Avalanche 1500 2WD V8-5.3L VIN TSECTION General Information
The Powertrain Control Module (PCM) is designed to maintain exhaust emission levels while maintaining excellent driveability and fuel efficiency. The PCM controls the following operations:
^ The fuel control
^ The Ignition Control (IC)
^ The Knock Sensor (KS) system
^ The automatic transmission shift functions
^ The manual transmission
^ The cruise control enable, if equipped
^ The generator
^ The evaporative emissions (EVAP) purge
^ The A/C clutch control, if equipped
^ The secondary air injection (AIR), if equipped
^ The Exhaust Gas Recirculation (EGR)
^ The fuel control
^ The Ignition Control (IC)
^ The Knock Sensor (KS) system
^ The automatic transmission shift functions
^ The manual transmission
^ The cruise control enable, if equipped
^ The generator
^ The evaporative emissions (EVAP) purge
^ The A/C clutch control, if equipped
^ The secondary air injection (AIR), if equipped
^ The Exhaust Gas Recirculation (EGR)
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.