Campaign - Temporary Brake Assist Reduction When Cold: Overview
CUSTOMER ADVISORYBulletin No.: 09068
Date: June 26, 2009
Subject: 09068 - CUSTOMER ADVISORY - TEMPORARY REDUCTION IN POWER BRAKE ASSIST IN EXTREME COLD WEATHER
Models:
2009 BUICK ENCLAVE
2009 CHEVROLET TRAVERSE
2009 GMC ACADIA
2009 SATURN OUTLOOK
Condition
General Motors previously announced a Customer Satisfaction Program involving 2009 model year Buick Enclave, Chevrolet Traverse, GMC Acadia, and Saturn OUTLOOK vehicles registered in states with temperatures reaching -5°to -49°F. These states are listed below.
Alaska
Colorado
Idaho
Illinois
Indiana
Iowa
Maine
Michigan
Minnesota
Montana
Nebraska
New Hampshire
New York
North Dakota
Ohio
Pennsylvania
South Dakota
Vermont
Wisconsin
Wyoming
Customer Advisory Coverage
Customers whose vehicles are registered in states other than the above listed, can choose to have the two brake booster vacuum hose check valves replaced if they expect to travel in the involved states when the temperatures are -5° to -49°F. If the customer requests this service, dealer/retailers are to provide it without charge according to the bulletin through June 30, 2010.
Vehicles Involved
Involved are certain 2009 model year Buick Enclave, Chevrolet Traverse, GMC Acadia, and Saturn OUTLOOK vehicles that are registered outside of Alaska, Colorado, Idaho, Illinois, Indiana, Iowa, Maine, Michigan, Minnesota, Montana, Nebraska, New Hampshire, New York, North Dakota, Ohio, Pennsylvania, South Dakota, Vermont, Wisconsin, and Wyoming, and built within the following VIN breakpoints:
Parts Information
GM Only: Parts required to complete this program 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.
Saturn Only: A pre-shipment of the required parts to perform this program has been sent to involved Saturn US retailers from Saturn Service Parts Operations (SSPO).
Customer Notification
General Motors will notify customers of this special coverage on their vehicles (see copy of typical customer letter shown in this bulletin - actual divisional letter may vary slightly).
Service Procedure
Warning
If the brake check valves are NOT installed correctly, an increased amount of brake pedal effort will be required to obtain brake function. The brake assist system will NOT perform as designed if the check valves are installed incorrectly. Carefully read and perform Steps 7-8 to ensure proper installation of the brake check valves.
Replace the first design brake booster vacuum hose check valve (1) with a second design brake booster vacuum hose check valve (2). An arrow on the second design check valve indicates the vacuum draw direction (3).
1. Remove the fuel injector sight shield (engine cover) from the engine. Refer to Fuel Injector Sight Shield Replacement in SI.
Check Valve #1
Check Valve #2
Power Brake Booster Auxiliary Pump
Quick Connect
Protective Wrap
Intake Manifold Vacuum Port
2. Determine where the two brake booster vacuum hose check valves are located. Refer to callouts 1 and 2 in the illustration.
3. Release the quick connect (4) from the power brake booster auxiliary pump (3).
4. Remove the protective wrap (5) from the brake booster vacuum hose to locate the check valve (1).
5. Remove the check valve (1) from the brake booster vacuum hose that routes to the power brake booster auxiliary pump (3).
6. Remove the check valve (2) from the brake booster hose that routes to the intake manifold vacuum port (6).
Brake Check Valve #1
Brake Check Valve #2
Brake Hose Tee
Vacuum Draw Direction
Warning
If the brake check valves are NOT installed correctly, an increased amount of brake pedal effort will be required to obtain brake function. The brake assist system will NOT perform as designed if the check valves are installed incorrectly. Carefully read and perform Steps 7-8 to ensure proper installation of the brake check valves.
Note
If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum hose to the manifold vacuum port. Do not use soap.
7. Install a new check valve (1) to the brake booster hose that routes to the power brake booster auxiliary pump (3). Ensure the arrow on the check valve (1) points toward the power brake booster auxiliary pump (3) and away from the brake hose tee. Refer to illustration. Ensure the hose is pushed over the check valve barbs and onto the serrated portion of the check valve.
Brake Check Valve #2
Intake Manifold Vacuum Port
Brake Hose Tee
Vacuum Draw Direction
8. Install a new check valve (2) to the brake booster hose that routes to the intake manifold vacuum port. Ensure that the arrow on the check valve (2) points toward the intake manifold vacuum port and away from the brake hose tee. Refer to illustration. Ensure the hose is pushed over the check valve barbs and onto the serrated portion of the check valve.
9. Connect the second piece of brake booster hose that routes to the intake manifold vacuum port (6) to the check valve (2).
10. Connect the second piece of brake booster hose that routes to the power brake booster auxiliary pump to the check valve (1).
Notice
If you are unable to pull the protective wrap (5) over the brake check valve (1), remove the protective wrap (5) from the brake hose. Cut the protective wrap (5) into two pieces. Ensure one of the two pieces of protective wrap (5) is cut to 150 mm (6 in) in length. Position the 150 mm (6 in) piece of protective wrap between the brake vacuum hose tee and the brake check valve directly over the aluminum manifold. Position the second piece of the protective wrap (5) between the brake check valve and the power brake booster auxiliary pump (3).
11. Install protective wrap (5) over the brake booster hose that routes to the power brake booster auxiliary pump (3). Ensure the protective wrap covers the area of the hose that is directly over the aluminum manifold.
12. Connect the quick connect (4) to the power brake booster auxiliary pump (3).
13. Install the fuel injector sight shield (engine cover). Refer to Fuel Injector Sight Shield Replacement in SI.
14. Start the engine and let it idle for 1 minute.
15. Apply brake pedal 3-5 times to ensure vacuum is getting to the brake booster. If a hard brake pedal is experienced, refer to steps 7-8 to check the brake check valve orientation.
Claim Information - GM Onlyl
For vehicles repaired under the terms of this customer advisory, submit a claim with the information indicated below:
Claim Information - Saturn Only
1. To receive credit, submit a claim with the information below:
* The parts allowance should be the sum total of the current SSPO retailer net price plus 40% of all parts required for the repair. 2. Submit courtesy transportation as a net item using the appropriate net item code.
Courtesy Transportation
The General Motors Courtesy Transportation program is intended to minimize customer inconvenience when a vehicle requires a repair that is covered by the New Vehicle Limited Warranties. The availability of courtesy transportation to customers whose vehicles are within the warranty coverage period and involved in a product program is very important in maintaining customer satisfaction. Dealers are to ensure that these customers understand that shuttle service or some other form of courtesy transportation is available and will be provided at no charge. Dealers should refer to the General Motors Service Policies and Procedures Manual for Courtesy Transportation guidelines.
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