LaCrosse FWD L4-2.4L (2011)
Control Module HVAC: Recalls
Recall - Unable To Adjust HVAC Settings, Affects Defrost
FMVSS NONCOMPLIANCE
Bulletin No.: 11057A
Date: March 08, 2011
Subject: 11057A - Unable to Adjust Heating, Ventilation, and Air Conditioning Settings - Reprogram Module
Models:
2011 Buick LaCrosse
2011 Cadillac SRX
Supercede:
This bulletin is being revised to include a copy of the customer notification letter. Please discard all copies of bulletin 11057, issued March 2011.
Condition
General Motors has decided that certain 2011 model year Buick LaCrosse and Cadillac SRX vehicles fail to conform to Federal/Canada Motor Vehicle
Safety Standard 103, Windshield Defrosting and Defogging Systems. On these vehicles, software in the Electronic Climate Control (ECC) module may
disable the ability to adjust the Heating, Ventilation, and Air Conditioning (HVAC) system settings. If this happens, the driver will not be able to control
the heating, cooling, and ventilation for the vehicle. If this condition affects the defrost system when it is required, it may decrease the driver's visibility,
and could possibly result in a crash.
Correction
Dealers are to reprogram the ECC module.
Vehicles Involved
Involved are certain 2011 model year Buick LaCrosse and Cadillac SRX vehicles.
Important
Dealers are to confirm vehicle eligibility prior to beginning repairs by using the Required Field Actions section in the Global Warranty system.
Not all vehicles may be involved.
For dealers with involved vehicles, a listing with involved vehicles containing the complete vehicle identification number, customer name, and address
information has been prepared and will be provided to US and Canadian dealers through the GM GlobalConnect Recall Reports, or sent directly to
export dealers. Dealers will not have a report available if they have no involved vehicles currently assigned.
The listing may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration
data for any purpose other than follow-up necessary to complete this recall is a violation of law in several states/provinces/countries. Accordingly, you
are urged to limit the use of this report to the follow-up necessary to complete this recall.
Parts Information
No parts are required for this recall.
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) and TIS2WEB with the calibration update. When using a MDI for
reprogramming, ensure that it is updated with the latest software version. Use TIS2WEB on or after 3/3/11 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.
2. Reprogram the ECC remote heater and air condition control module. Refer to SI and Service Programming System (SPS) documentation for
programming instructions, if required.