DTC C0550. Chevrolet Avalanche

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2004 🢒 Avalanche - 4WD 🢒 DTC 🢒 DTC C0550

The electronic suspension control (ESC) module performs internal checks on hardware and software calibrations to ensure valid operation.

Upon key on with the ignition in the ON/RUN position.

The ESC module detects an error with its microprocessor.

•	Disable all functions, rear leveling and ESC.

•	The SERVICE RIDE CONTROL message will be displayed.

•	Stores a DTC C0550 in the ESC module memory.

•	Using the scan tool.

•	A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

•	Program the ESC module and cycle the ignition Off and On to see if DTC C0550 resets. Repeat 2 times before replacement.

•	The replacement ESC module must be programmed when replacement is necessary.

The numbers below refer to the step numbers on the diagnostic table.

Checking to verify the DTC will not reset.

Replace the ESC module and program.

Step	Action	Yes	No
Schematic Reference: Suspension Controls Schematics
1	Did you perform the ESC Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Electronic Suspension Control
2	Use the scan tool in order to clear the DTCs. Use the scan tool to perform the programming procedure for the ESC module, located under SPECIAL FUNCTIONS -- Recalibration. Also perform the ALC trim set, located under SPECIAL FUNCTIONS -- ALC Trim set, if applicable. Turn OFF the ignition and wait 45 seconds. Turn ON the ignition, with the engine OFF. Select the ESC module display DTCs function on the scan tool. Does the scan tool display DTC C0550?	Go to Step 3	Go to Diagnostic System Check - Electronic Suspension Control
3	Replace the ESC module. Refer to Electronic Suspension Control Module Replacement . Did you complete the replacement?	System OK	--