Symptoms - Electronic Suspension Control. GMC Truck Yukon

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2004 🢒 Yukon - 2WD 🢒 Suspension 🢒 Electronic Suspension Control (ESC) 🢒 Symptoms - Electronic Suspension Control

Important: The following steps must be completed before using the symptom tables.

Perform the Diagnostic System Check - Electronic Suspension Control before using the symptom table in order to verify that all of the following are true:

•	There are no DTCs set.

•	The control modules can communicate via the serial data link.

Review the system operation in order to familiarize yourself with the system functions. Refer to Electronic Suspension Control Description and Operation .

•	Inspect for aftermarket devices which could affect the operation of the ESC System. Refer to Checking Aftermarket Accessories in Wiring Systems.

•	Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

•	Inspect the connectors to be properly seated and free of corrosion.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Check 38 way connector C405 for intermittents. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	Service Ride Control Indicator Always On

•	Service Ride Control Indicator Inoperative