Autoride (Z55) Service Ride Control / Service Suspension System message

Applies toThe GM preliminary information covers 2001-2013 GMC Yukon, Yukon XL, Yukon Denali and Yukon Denali XL with RPO Z55 or Z95.

2001-2013 GMC Yukon, Yukon XL LD, Yukon Denali, Yukon Denali XL With RPO Z55 or Z95— [1] p.1

First signsOn 2009 or earlier vehicles a Service Suspension System message may appear and the rear ride height may be incorrect.

Some customers of 2009 or prior vehicles, may comment of a Service Suspension System message on the DIC and the rear suspension ride height is incorrect.— [1] Condition 1

First signsThe Electronic Suspension Control module will have DTC C0696 or C0711 set.

When checking for DTCs the Electronic Suspension Control (ESC) module will have DTC C0696 or C0711 set.— [1] Condition 1

Why it happensThe cause can be the automatic level control pressure sensor wiring shorted to ground.

This concern could be caused by the wiring to the automatic level control (ALC) pressure sensor being shorted to ground, as shown below.— [1] Condition 1

How to confirmThe compressor assembly may need to be removed to see whether the wiring is pinched between the compressor and the frame.

The air compressor assembly may need to be removed from the vehicle to determine if the wiring is possibly pinched between the compressor assembly and frame.— [1] Condition 1

CautionDo not replace the complete air compressor assembly for this concern.

DO NOT replace the complete air compressor assembly for this concern.— [1] Recommendation, condition 1

RepairRepair the damaged or shorted circuits and reposition the wiring so it is not damaged again when the compressor is installed.

Repair any damaged or shorted circuits and then reposition the wiring so it does not get damaged again during the compressor assembly installation.— [1] Recommendation, condition 1

First signsCustomers may also report that the rear ride height is low under a heavy payload.

may also comment that the rear suspension ride height may be low under a heavy payload.— [1] Condition 2

Why it happensAn internal fault in the level control pressure sensor may be caused by moisture getting into the sensor.

This concern may be caused by an internal fault in the automatic level control (ALC) pressure sensor. This may occur due to moisture getting into the sensor.— [1] Condition 2

RepairThe sensor is not serviced separately; install a complete air filter, dryer and sensor assembly.

The sensor is no longer serviced separately. For sensor replacement, install a complete air filter, dryer, and sensor assembly.— [1] Recommendation, condition 2

How to confirmThe module checks level-system pressure at start-up and runs the compressor to add air to the shocks if it is below 10 psi (69 kPa).

The Electronic Suspension Control module checks the automatic level system pressure at start up. If the pressure is below 10 psi (69 kpa) then the system will operate the compressor to add air to the shocks as a replenishment cycle.— [1] Condition 4

RepairFor a Service Ride Control message with DTC C0580, replace the right front shock absorber solenoid connector and install new A/C suction and auxiliary evaporator hoses.

SERVICE RIDE CONTROL MESSAGE DISPLAYED DIAGNOSTIC TROUBLE CODE C0580 SET REPLACE RIGHT FRONT SHOCK ADSORBER SOLENOID CONNECTOR AND INSTALL NEW AC SUCTION HOSE AND AUXILIARY AC EVAPORATOR HOSE.— [2]

First signsCondition 3: a loose hose hangs down at the left rear of the vehicle; the hose may be damaged or disconnected from the air inlet filter of the auto leveling suspension air compressor.

CONDITION #3: Some customers may comment of a loose hose hanging down in the left rear of the vehicle. Upon inspection it may be determined that the hose is damaged or has become disconnected from the air inlet filter of the auto leveling suspension air compressor.— [3]

First signsCondition 4: the automatic level control compressor no longer performs a self test (running for a few seconds) at start up.

CONDITION #4: Some customers may comment that the automatic level control compressor is no longer performing a self test (compressor activating for a few seconds) at start up.— [3]

RepairThe jumper harness is included with the complete air filter, dryer, and sensor assembly PN 22964558; vehicles built in May, 2012 and later do not require the jumper harness and use PN 22941807.

The jumper harness is included with complete air filter, dryer, and sensor assembly, PN 22964558. Vehicles built in May, 2012 and later do not require the jumper harness, and use PN 22941807.— [3]

RepairFor condition 3, do not replace the complete air compressor assembly; replace the auto leveling compressor air inlet filter and hose assembly (PN 22197160).

CONDITION #3: Note: Do NOT replace the complete air compressor assembly for this concern. Replace the auto leveling compressor air inlet filter and hose assembly (PN 22197160), shown below.— [3]

CautionRoute the sensor wiring carefully under and around the air filter, dryer, and sensor assembly to prevent damage along the vehicle frame.

Ensure the sensor wiring (1) is routed carefully under and around the air filter, dryer, and sensor assembly to prevent damage along the vehicle frame— [3]

CautionThe automatic level system normally will not, or will only very infrequently, cycle the compressor at key up.

The automatic level system normally will not or very infrequently cycle the compressor at key up.— [3]