GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC K Pickup - 4WD 🢒 DTC 🢒 DTC C0559 EEPROM Checksum Error

Object Number: 573261 Size: LF
Theft Deterrent System Components
Passlock ™
Variable Effort Steering (00C/K)
Theft Deterrent System Schematic Icons

Circuit Description

This DTC indicates an EVO/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 EVO/Passlock™ module is not replaceable. If DTC C0559 is set, the module must be replaced.

Step

Action

Value(s)

Yes

No

1

Did you perform the VTD diagnostic system check?

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Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

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

Is the repair complete?

--

Go to Step 3

--

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 one of the following Passlock™ reprogramming procedures:

Is the repair complete?

--

Go to Diagnostic System Check - Theft Deterrent

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