For 1990-2009 cars

# RADIO CLOCK GAINS TIME IN EXCESS OF ONE MIN. A MONTH

#### SUBJECT: RADIO CLOCK GAINS TIME IN EXCESS OF ONE MINUTE A MONTH (CALIBRATE CLOCK USING TECH 2)

#### MODELS: 1998 BUICK CENTURY, LESABRE, PARK AVENUE, REGAL, RIVERIA

#### CONDITION:

SOME CUSTOMERS MAY COMMENT THE RADIO CLOCK GAINS AN EXCESSIVE AMOUNT OF TIME.

#### CAUSE:

EARLY PRODUCTION RADIOS WERE MANUFACTURED WITH THE WRONG CALIBRATION FOR THE CLOCK.

#### CORRECTION:

IDENTIFY THE RADIO SERIAL NUMBER (EX: 89BUBHD380795000) LOCATED ON THE RADIO LABEL. IF THE LAST FOUR DIGITS ARE BELOW 5000, THEN PROCEED WITH THIS BULLETIN. IF THE SERIAL NUMBER IS ABOVE 5000, THEN IT HAS THE CORRECT CALIBRATION AND MUST BE SENT TO AN AUTHORIZED SERVICE CENTER.

#### IMPORTANT: IF VEHICLE IS EQUIPPED WITH THE ONSTAR, YOU MUST FIRST DISCONNECT THE VIU BEFORE PERFORMING THE FOLLOWING PROCEDURE. FAILURE TO DISCONNECT THE VIU WILL RESULT IN WRONG CALIBRATION OF THE RADIO.

CONFIRM THE TECH 2 IS UPDATED WITH DISK #15, 1998 OR LATER. USING THE TECH 2 TOOL, CHOOSE THE FOLLOWING:

1. DIAGNOSTICS 2. MY 3. PASSENGER CAR 4. BODY 5. BODY STYLE (C,H,G,W) 6. BUICK 7. ENTERTAINMENT + COMFORT BUS 8. SPECIAL FUNCTIONS 9. RADIO TIME OF DAY FIX

AT THIS POINT, THE TECH 2 WILL AUTOMATICALLY CALIBRATE THE CLOCK.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: RO747 LABOR OPERATION TIME: USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 00 ATTACHMENTS: 00

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.

COPYRIGHT 1998 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.