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2002 CHEVROLET EXPRESS

6.0L V8 VortecRWDAUTOMATICgas
Repairs0Labor593Torque4658Fluid7DTC745Battery1Maintenance0Recalls0
P0602high severityPowertrain

Control Module Programming Error

on 2002 Chevrolet Express 6.0L V8 Vortec · RWD

What this code means

The PCM is not properly programmed or calibration is missing.

Symptoms

  • Check Engine Light
  • Various driveability issues
  • Incorrect operation

Common causes

  • PCM not programmed after replacement
  • Incomplete flash/reprogramming
  • Wrong calibration file

Diagnostic steps

  1. Verify PCM part number matches application
  2. Reprogram PCM with correct calibration
  3. Check for TSBs

Repair notes

Reprogram PCM with correct calibration files.

Other Powertrain codes on this vehicle

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