Your vehicle MAY be involved in this recall.
Call your dealer with your vehicle VIN (vehicle Identification Number) to see if its included.
Either way, may be the fix for it.
Subject: 11195B – Rough Idle, Poor Driveability - Reprogram Engine Control Module Models: 2011 Buick LaCrosse, Regal 2011 Chevrolet Equinox 2011 GMC Terrain Equipped with a 2.4L Gas Engine (LAF)
Reminder: Vehicles that have been delivered to customers MUST have the camshaft position actuator solenoid valves replaced, in addition to reprogramming the ECM . Please discard all copies of bulletin 11195A, issued August 2011. Condition:
General Motors has decided to conduct a Voluntary Emission Recall involving certain 2011 Buick LaCrosse, Regal; Chevrolet Equinox; and GMC Terrain vehicles equipped with a 2.4L gas engine (LAF). On these vehicles, the camshaft position actuator solenoid may stick, resulting in the illumination of the malfunction indicator light, rough idle, poor driveability, and/or possible stalling at low throttle opening. Correction
Dealers are to reprogram the engine control module and, if necessary, replace the camshaft position actuator solenoid valves. Vehicles involved
Involved are certain 2011 model year Buick LaCrosse, Regal; Chevrolet Equinox; and GMC Terrain vehicles equipped with a 2.4L gas engine (LAF).
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
Parts required to complete this recall are to be obtained from General Motors Customer Care and Aftersales (GMCC&A). 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.
Part Number
Description
Quantity/Vehicle
12628347
Valve, Cm/Shf Posn Actr Int Sol
1 (If Req’d)
12628348
Valve, Cm/Shf Posn Actr Exh Sol
1 (If Req’d) Service Procedure
Determine the vehicle status.
If the vehicle is still in dealer inventory, reprogram the ECM with the latest calibration. Refer to ECM Programming in this bulletin. Do NOT replace the camshaft position actuator solenoid valves. If the vehicle has been delivered to the customer, reprogram the ECM and replace the camshaft position actuator solenoid valves. Refer to Engine Controls – Camshaft Position Actuator Solenoid Valve Replacement in SI. ECM Programming 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® diagnostic scan tool and TIS2WEB with the calibration update. Use TIS2WEB on or after 6/23/11 to obtain the calibration. If you cannot access the calibration, call the Techline Customer Support Center at 1-800-828-6860 (English) or 1-800-503-3222 (French) and it will be provided. Make sure your Tech 2® diagnostic scan tool is updated with the latest software version or verify that the multiple diagnostic interface (MDI) that is being used is configured to the PC that will be used. Clear any codes and verify the condition has been corrected.
For step-by-step programming instructions, please refer to SI and the Techline Information System (TIS) terminal.
- 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® PSC 550 Battery Maintainer (SPS Programming Support Tool EL-49642) or equivalent to maintain proper battery voltage during programming.
- Reprogram the engine control module (ECM). Refer to SI and Service Programming System (SPS) documentation for programming instructions, if required.
- Connect the MDI to the vehicle. Connect the MDI to the programming terminal with a cable (USB or LAN).
- Select J2534 MDI and Reprogram ECU from the Select Diagnostic Tool and Programming Process screen.
- Select ECM Engine Control Module—Programming from the Supported Controllers screen.
- Follow the on-screen instructions.
- Clear all DTCs.
- If the vehicle has been delivered to the customer, replace the camshaft position actuator solenoid valves. Refer to Engine Controls – Camshaft Position Actuator Solenoid Valve Replacement in SI.
- CALIFORNIA, CONNECTICUT, MARYLAND, MASSACHUSETTS, MAINE, OREGON, VERMONT, & WASHINGTON vehicles only: Install a Recall Identification Label.