GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Theft Deterrent 🢒 DTC C0559 EEPROM Checksum Error

Object Number: 381555 Size: LF
Theft Deterrent System Components
Theft Deterrent System Schematics Vehicle Theft Deterrent
Variable Effort Steering
Theft Deterrent System Schematic Icons
Theft Deterrent System Schematic Icons

Circuit Description

This DTC indicates a 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?

--

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 1 of the following Passlock reprogramming procedures:

Is the repair complete?

--

Go to Diagnostic System Check - Theft Deterrent

--