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Wiring diagrams Section: Testing & Diagnostics

Engine Controls - 3.5L - Introduction (1 of 2)

Engine Controls - 3.9L - Introduction (1 of 2)

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P0602 Chevrolet Uplander I

Testing & Diagnostics

The following conditions must be met

The ignition switch is in Run or Crank.
The controller is identified as a service replacement PCM.