GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Savana 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 DTC C0559

Circuit Description

This DTC indicates a Passlock™ Module internal memory failure.

Conditions for Setting the DTC

All of the following conditions must be met:

    • The ignition switch is ON.
    • An internal error detection diagnostic found a failure in the module memory.

Diagnostic Aids

The memory portion of the Passlock™ Module is not replaceable. If DTC C0559 is set, the Passlock™ Module must be replaced.

Step

Action

Yes

No

1

Did you perform the VTD diagnostic system check?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2
  1. Turn the ignition switch to the OFF position.
  2. Replace the Passlock™ Module. Refer to Theft Deterrent Module Replacement .

Is the repair complete?

Go to Step 3

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3
  1. Reconnect all previously disconnected connectors and components.
  2. Turn the ignition switch ON.
  3. Connect the scan tool.
  4. Clear the DTCs.
  5. Perform the Programming Theft Deterrent System Components procedure.

Is the repair complete?

Go to Diagnostic System Check - Theft Deterrent

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