GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2004 🢒 H2 🢒 DTC 🢒 DTC C0550

Circuit Description

This DTC identifies a malfunction within the EBCM.

Conditions for Running the DTC

The ignition switch is in the ON position.

Conditions for Setting the DTC

DTC C0550 is set when an internal EBCM or solenoid malfunction exists.

Action Taken When the DTC Sets

If equipped, the following actions occur:

    • The EBCM disables the ABS/TCS for the duration of the ignition cycle.
    • A malfunction DTC will set.
    • The ABS indicator turns on.
    • The TCS indicator turns on.

Conditions for Clearing the DTC
    • The condition for the DTC is no longer present and you used the scan tool Clear DTC function.
    • The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Step

Action

Yes

No

Schematic Reference: Antilock Brake System Schematics

Connector End View Reference: Antilock Brake System Connector End Views

1

Did you perform the Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

2

Are any other DTC(s) present besides C0550?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

3

Replace the EBCM. Refer to Electronic Brake Control Module Replacement .

Is the replacement complete?

Go to Step 4

--

4
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK