DIGITAL CLUSTERS/REPLACEMENT SERVICE INFORMATION

DIGITAL AND QUARTZ CLUSTERS AND GCC MONITOR

MODELS AFFECTED: 1986 SKYLARK, SOMERSET, CENTURY, LESABRE, ELECTRA AND ---------------- RIVIERA

Buick continues with an exchange repair program for The optional 1986 digital instrument clusters on Century, Regal, LeSabre and Electra models; the standard digital instrument clusters on the Skylark, Somerset and Riviera; the standard quartz instrument clusters on the LeSabre and Electra; and the standard Graphic Control Center (GCC) monitor on the Riviera. This program provides repaired units in exchange for inoperative ones at a cost a below substantially below new replacement parts.

These units are serviced with the exchange units listed in the following chart. Content of the exchange unit is explained on each page of the chart. The U.S. exchange units are available from the seven (7) U.S. authorized AC- Delco Service Centers listed in this bulletin. Metric Canadian units are available from the Canada Service Center listed in this bulletin.

An exchange unit may be obtained by telephoning the nearest service center listed in this bulletin. (For Your convenience, all eight centers have toll-free numbers.) The requested exchange unit will be shipped via UPS within 24 hours, along with a U" billing. The memo billing will be cancelled when the inoperative unit is received by the service center from which you obtained the exchange unit. Should the situation arise where the service center called is not able to immediately ship an exchange unit, you have the option of calling another listed center. However, the first center called should be informed to cancel your order.

Please adhere to the following procedure when a vehicle requires dealer service for an inoperative unit.

1. Follow the diagnostics procedure in the Service Manual precisely and completely. Many conditions perceived by the observer to be in the unit may actually be with remote sensors and connectors. Proper diagnostics will identify the Source of the condition and avoid unecessary removal and shipping of functional assemblies to service centers.

2. When diagnostics are complete and it is determined to be in the unit, call one of the service centers, and request the appropriate exchange unit. On Skyhawk and Somerset the service center will need the vehicle serial number; AC or Yazaki design; and if AC, lst or 2nd design. Illustrations of the 1986 Buick units are included in the chart with this bulletin to assist you in ordering the correct exchange unit. After the exchange unit is received ,from the service center, remove the inoperative unit by following the Removal and Installation Procedures in your Service Manual. Be sure to transfer the nonvolatile memory clip (NVM), if so equipped, from the removed cluster to the exchange unit. Use care in handling the exchange unit. Hands must be free of dirt and grease. Avoid touching electronic components in the unit, since electrostatic discharge can cause some components to fail.

4. Pack the inoperative unit previously removed from the vehicle in the reusable shipping container, together with all five (5) copies of the completed ACD 1078A warranty form. Be sure to include a description of the problem in the "Nature of Problem area of the AM 1078A Form to assist the service center in isolating the cause. All information except for dealer's signature must be typed. Failure to return the inoperative unit in the special reusable container can result in a $10.00 container replacement fee.

5. Enclosed in the reusable container is an addressed shipping label. Attach this label to the outside of the box and ship immediately to the service center from which you obtained the exchange unit. The dealer copy of the ACD 1078A warranty form will be returned to you and the memo billing will be cancelled upon receipt of the inoperative unit at the service center. The success of the Exchange Progam is dependent upon prompt return of the inoperative unit to the service centers. Your cooperation is essential to maintain sufficient stock at each center.

AUTHORIZED AC-DELCO SERVICE CENTERS

WEST ---- Auto Electric Radio 1841 W. Commonwealth Fullerton, CA 92633

(714) 871-7426 1-800-321-6969 - Outside California 1-800-321-6970 - California Only

Randazzo Auto Radio 233 Commercial St. San Jose, CA 95112

(408) 293-1920 1-800-538-9702 - Outside California 1-800-662-9877 - California Only

Speedometer Service Co. 14109 Inwood Rd. Dallas, Tx 75234

(214) 387-8511 1-800-527-0108 or 9 - Outside Texas 1-800-492-9026 - Texas Only

EAST

United Radio Service 2949 Erie Blvd., East Syracuse, NY 13224

(315) 446-5570 1-800-448-0944 - Outside New York 1-800-962-0901 - New York Only

Techni-Car, Inc. 4901 C. Rio Vista Ave. Tampa, FL 33615

(813) 884-0022 1-800-822-0022 - Outside Florida 1-800-662-0022 - Florida Only

MIDWEST

Specmo Instrument Service 2344 N. Woodward Avenue Royal Oak, MI 48073

(313) 399-5645 1-800-545-7910 - Michigan Only 1-800-545-7911 - Outside Michigan

D & B Auto Radio, Inc. 3725 N. 25th Ave. Schiller Park, IL 60176

(312) 678-8475 1-800-323-4813 - Outside Illinois 1-800-942-8049 - Illinois Only CANADA ------

Custone Auto Radio 1614 Charles St. Whitby, Ontario Canada, LIN 1B9

(416) 668-2664 1-800-263-7867 - Canada Only

-1986 Buick "C/H" Electra and LeSabre - Vacuum Flourescent Instrument Cluster

Exchange Unit Part Number Description ---------- ----------- 25084597 All

Exchange unit consists of complete instrument cluster less non-volatile memory odometer module. (Module remains with vehicle.)

-1986 Buick "E" Riviera - Graphic Control Center Monitor

Exchange Unit Part Number Description ----------- ----------- 25084614 All

Exchange unit consists of complete GCC Monitor.

-1986 Buick "A" Century - Vacuum Flourescent Instrument Cluster

Exchange Unit Part Number Description ----------- ----------- 25053117 U.S. 3 Speed Column Shift 25053118 U.S. 4 Speed Column Shift 25053223 Canadian 3 Speed Column Shift 25078505 U.S. Console Shift 25078507 Canadian Console Shift 25078508 Canadian 4 Speed Column Shift

Exchange unit consists of electronics (circuit boards and displays), face plate, and shift indicator. (Mechanical speedometer frame assembly, including odometer, remains with vehicle.)

-1986 Buick "C/H" Electra and LeSabre - Quartz Speedometer

Exchange Unit Part Number Description ----------- ----------- 25059459 U.S. with Trip Odometer 25059460 Canadian with Trip Odometer 25059461 Export without Trip Odometer 25059462 U.S. without Trip Odometer 25059463 Canadian without Trip Odometer

Exchange unit consists of mechanism and circuit board, odometers and motor, shift indicator, and fuel gage, assembled to a "dummy" housing. Housing has no flexible circuit, clips, lamps, etc.; sole function is to protect rest of exchange unit during shipment. Two (2) screws along top of exchange unit hold all components in place.

-1986 Buick "E" Riviera - Vacuum Fluorescent Instrument Cluster

Exchange Unit Part Number Description ----------- ----------- 25084615 All

Exchange unit consists of complete instrument cluster.

-1986 Buick "G" Regal - Vacuum Flourescent Instrument Cluster

Exchange Unit Part Number Description ---------- ----------- 25088463 U.S. Turbo 4 Speed Auto Column Shift 25078464 U.S. Gas 3 Speed Auto Column Shift 25078466 Canadian Gas 3 Speed Auto Column Shift 25078467 Canadian Gas 4 Speed Auto Column Shift 25078468 U.S. Gas Console Shift 25078469 U.S. Turbo Console Shift 25078471 Canadian Gas Console Shift 25078472 U.S. Gas 4 Speed Auto Column Shift

Exchange unit consists of electronics (circuit boards and displays), face plate and trip odometer reset shaft. (Mechanical speedometer frame assembly, including odometer, remains with vehicle.)

-1986 Buick "N" Somerset Regal and Skylark - Vacuum Fluorescent Instrument Cluster Built by AC

Exchange Unit Part Number Description ----------- ----------- 25083755 All 1st Design 25084616 All 2nd Design

NOTE: 1st Design: May be identified by pulling off one of the switch knobs. Backside of knob is smooth and round with a square hole in the end.

2nd Design: Backside of knob is round and laddered to a narrower end with a rod in the end.

Exchange unit consists of electronics (circuit board and display) less non-volatile memory odometer module. (Module remains with vehicle.)

To distinguish between AC and Yazaki clusters pull trim plate. The AC logo will be on the lens along with two caution labels. Yazaki has no logo or caution labels on the lens.

-1986 Buick "N" Somerset Regal and Skylark - Vacuum Fluorescent Instrument Cluster Built by Yazaki

Exchange Unit Part Number Description ----------- ----------- 25084617 All

Exchange unit consists of electronics (circuit board and display) less non-volatile memory odometer module. (Module remains with vehicle.)

To distinguish between AC and Yazaki clusters pull trim plate. The AC logo will be on the lens along with two caution labels. Yazaki has no logo or caution labels on the lens.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.