Technical Procedure
FIGURE 1 - MASTER CYLINDER FRONT BRAKE PIPE REQUIRED CLEARANCE TO RESONATOR BRACKET:
FIGURE 2 - MASTER CYLINDER TO PROPORTIONER VALVE BRAKE PIPE INSTALLATION AND CLEARANCES:
1. Open vehicle hood and check to determine if the rear brake system pipe from master cylinder to proportioner valve has a minimum clearance of 3/4" to the air cleaner resonator bracket. Refer to Figure 1 and Figure 2 - View A.
FIGURE 2 - MASTER CYLINDER TO PROPORTIONER VALVE BRAKE PIPE INSTALLATION AND CLEARANCES:
2. If the brake pipe has been contacting the bracket and has a shiny or worn spot due to this contact, replace pipe with part number 25513371 Refer to Section 5 of the 1983 chassie Service Manual for brake bleeding information and Figure 2 - for required pipe clearances.
3. If clearance is less than specified, reform the pipe to provide 3/4-inch clearance. If the pipe is replaced due to wear, be sure to provide 3/4-inch clearance between it and the resonator bracket, and properly refill the system with brake fluid and bleed to insure performance.
4. Install campaign identification label.
Each vehicle modified in accordance with the instructions outlined herein will require a campaign Identification Label. Each label
CAMPAIGN LABEL:
provides a space to include the Campaign Number, the five (5) digit Dealer Code of the dealer performing the campaign service, and the date vehicle was campaigned. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the fan shroud and apply the Campaign Label.
WARRANTY INFORMATION
Dealers are to submit each campaigned vehicle as a separate case on the one-line Warranty Document Form S-764. Dealers submitting warranty claims by teletye terminal are to transmit campaign completions as a separate case also.
List the one applicable labor operation.
SUBLET
PART FAILED PARTS FAILURE LABOR LABOR OTHER DEALER
OPER COUNT PART NO. ALLOW. CODE OP. NO. HOURS HOURS MTL.TWG
Inspect &
Reposition *
Brake Pipe - - - 96 V1830 .2 .1 -
Inspect &
Replace ** * ***
Brake Pipe 1 25513371 96 V1831 .5 .1 $1.02
* .1 hour for administration ** List current dealer price of brake pipe number 25513371. plus 30%. ***Allowance for 1/2 pint of brake fluid.
To assure accurate records of all transactions on this Campaign, it is recommended that Campaign repairs for each vehicle be listed on a separate repair order. Other repairs performed to the vehicle may be listed on the same repair order, and warranty cases other than Campaigns may be listed on the same warranty document.
Zone authorization is not required.
Dear Buick Owner:
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
General Motors has determined that a defect which relates to motor vehicle safety exists in some 1983 (G) cars equipped with 5.7 liter V-8 diesel engines. The rear brake master cylinder brake pipe may rub on the air cleaner resonator bracket. Over an extended period of operation, the brake pipe could wear through, resulting in a brake fluid leak and loss of the rear brakes, These vehicles are equipped with dual braking systems; part of the system will still work and allow the vehicle to be stopped, but over a greater distance. Loss of rear braking at a time when minimum stopping distance is required could result in a vehicle crash without prior warning.
To prevent this from occurring on your vehicle, your Buick dealer will inspect for proper clearance between the master cylinder brake pipe and the resonator bracket. If necessary, they will make modifications to provide proper clearance. If the pipe is worn, due to contacting the bracket, the pipe will be replaced. This service will be performed at no charge to you.
Instructions for making this inspection and modification have been sent to your Buick dealer. Parts will be available approximately October 31, 1983. Please contact your dealer to arrange a service date. The labor time necessary to perform this inspection and modification is approximately 15 minutes. Brake pipe replacement, if required will take about half an hour. Please allow additional time for the dealer to process your vehicle.
Until you have had an opportunity to have this service completed, you should be alert for an increase in brake pedal travel during brake application and illumination of the brake warning light on the instrument panel.
Your Buick dealer is best equipped to obtain parts and provide service to ensure your vehicle is corrected as promptly as possible. However, if you take your vehicle to your dealer on the agreed service date, and they do not remedy this condition on that date or within five days, we recommend you contact the nearest Buick Zone Office, either in person or by telephone. The zone office will assist you and the dealer in getting your vehicle corrected. The locations and telephone numbers of the zone offices are listed in your Owner's Manual.
After contacting your dealer and the zone office, if you are still not satisfied that we have done our best to remedy this condition without charge within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 400 Seventh Street, S. W. Washington, D.C. 20590, or call 800-424-9393 (Washington, D.C. residents use 426-0123).
The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid owner reply card and returning it to us.
We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our products.