Manufacturer communication — 2006 GMC YUKON XL

• Applies to 2006-2014 GMC Yukon and Yukon XL (note: the years run later than the years this service covers).

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  2006-2014 GMC Yukon, Yukon XL

• Vehicles equipped with RPO F55, Z55 or Z95 are covered.

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  Equipped with RPO F55, Z55 or Z95

• A Service Suspension System message appears, with DTCs C0575, C0580, C0585 or C0590.

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  Service Suspension System Message, DTCs C0575, C0580, C0585 or C0590

Possible causes

• The 90 degree electrical connector at the top of a shock absorber (actuator) may not have been fully seated during assembly, or may have been bumped hard enough to partially disconnect it or create an internal contact concern.

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  During the assembly process, it is possible that the 90 degree electrical connector at the top end of a shock absorber (actuator) may not have been fully seated or has been bumped firmly enough to partially disconnect it, or create an internal contact concern.

Steps to confirm (in the document’s order)

1. Visually examine the green insulator and center post of the electrical connector to make sure it is straight and serviceable; replace the connector and retest if required.

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   Visually examine the green insulator and center post (1) of the electrical connector to assure it is straight and in serviceable condition. Replace the connector and retest if required.

2. If the code returns, swap the connector with the connector on the opposite side shock absorber (actuator).

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   If the code returns, remove the electrical connector from the shock absorber (actuator) and pigtail. Swap the connector with the connector on the opposite side shock absorber (actuator).

Repair

1. Reconnect the connector to the shock absorber (actuator), clear the suspension DTC and confirm that the code does not reset.

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   Reconnect the electrical connector to the shock absorber (actuator). Clear the suspension DTC and confirm that the code does not reset.

2. If the DTC follows the connector to the other side, replace the connector; if not, follow the SI diagnostics for the DTC originally found.

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   Does the DTC follow the connector to the other side? If YES, replace the connector, if NO refer to SI and follow the diagnostics for the DTC originally found.

Parts

• Part 19180262 Connector, S/ABS Elec Susp Control.

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  19180262 Connector, S/ABS Elec Susp Control

Caution

• Complete these steps before attempting shock absorber (actuator) replacement.

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  Complete the following steps BEFORE attempting shock absorber (actuator) replacement.