LaCrosse FWD L4-2.4L (2011)
Control Module: Recalls
Campaign - Increased RPM During Certain Shifts
SERVICE UPDATE
Bulletin No.: 10222
Date: July 26, 2010
Subject: 10222 - Service Update for Inventory and Customer Vehicles - Increased RPM During Certain Shifts - Expires with Base Warranty
Models:
2011 Buick Enclave, LaCrosse
2011 Chevrolet Traverse
2011 GMC Acadia
Equipped with 6-Speed Transmission (6T70/6T75)
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 New Vehicle Limited Warranty period.
Purpose
This bulletin provides a service procedure to reprogram the transmission control module on certain 2011 model year Buick Enclave, LaCrosse;
Chevrolet Traverse, and GMC Acadia vehicles equipped with a 6-speed transmission (6T70/6T75). On some of these vehicles, the engine RPM may
increase during a 1-2, 2-3, 3-2, or 2-1 shift for up to 1.5 seconds before the shift is completed. The condition most often occurs during low speed
cornering.
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 New Vehicle Limited Warranty coverage period.
Vehicles Involved
A list of involved vehicles currently in dealer inventory is available on the "Service Update Bulletin Information" link under the "Service" tab in GM
GlobalConnect (US), or attached to the GlobalConnect message (Canada), used to release this bulletin. Customer vehicles that return for service, for any
reason, and are still covered under the vehicle's base 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 Investigate Vehicle History link. Not all vehicles within the
above breakpoints may be involved.
Parts Information
No parts are required for this service update.
Service Procedure
Do not attempt to order the calibration number from GM Customer Care and Aftersales. The calibration numbers required for this service procedure are
programmed into control modules via a Multiple Diagnostic Interface (MDI) or Tech 2 and TIS2WEB with the calibration update. When using a MDI or
Tech 2 for reprogramming, ensure that it is updated with the latest software version. Use TIS2WEB on or after 07/19/10 to obtain the calibration. If
you cannot access the calibration, call the Techline Customer Support Center and it will be provided.
For step-by-step programming instructions, please refer to SI and the Techline Information System (TIS) terminal.
1. Verify that there is a battery charge of 12 to 15 volts. The battery must be able to maintain a charge during programming. Only use an approved
Midtronics(R) PSC 550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent to maintain proper battery voltage during
programming.
