Service Update for Inventory and Customer Vehicles-Turbocharger Vane Position Sensor-Replace

THIS SERVICE UPDATE INCLUDES VEHICLES IN DEALER INVENTORY AND CUSTOMER VEHICLES THAT RETURN TO THE DEALERSHIP FOR ANY REASON. IT WILL EXPIRE AT THE END OF THE INVOLVED VEHICLE'S 5 YEAR/ 100,000 MILE (160,000 KM) POWERTRAIN NEW VEHICLE LIMITED WARRANTY PERIOD.

This bulletin provides a service procedure to replace the Turbocharger Vane Position Sensor with a revised Sensor with improved long term corrosion performance on certain 2008 model year Chevrolet Silverado HD and GMC Sierra HD pickups; Chevrolet Kodiak and GMC TopKick 4500 and 5500 series medium duty trucks, equipped with a 6.6L Duramax V8 diesel (RPO LMM - VIN 6, 9) engine.

This service procedure should be completed as soon as possible on involved vehicles currently in dealer inventory and customer vehicles that return to the dealer for any type of service during the 5 Year/ 100,000 Mile (160,000 km) Powertrain New Vehicle Limited Warranty coverage period.

A list of involved vehicles currently in dealer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in DealerWorld (US), or attached to the Dealer Communication (Canada), used to release this bulletin. Customer vehicles that return for service, for any reason, and are still covered under the vehicle's Powertrain warranty, and are within the VIN breakpoints provided below, should be checked for vehicle eligibility in the appropriate system listed below.

Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the system below. Not all vehicles within the above breakpoints may be involved.

Parts required to complete this service update are to be obtained from General Motors Service and Parts Operations (GMSPO). Please refer to your "involved vehicles listing" before ordering parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts should be ordered on a CSO = Customer Special Order.

Important: Disregard the service procedure outlined in SI for Thermal Reflective Shield/Tape Installation. The Turbocharger Vane Position Sensor does not require this Thermal Tape for this vehicle application.

Refer to Turbocharger Vane Position Sensor Replacement in Service Information (SI).

For vehicles repaired under this service update, use: