DRIVER INFORMATION CENTER DATE/ETA INCORRECT. Oldsmobile Aurora 1995

SUBJECT: DRIVER INFORMATION CENTER DATE/ETA INCORRECT OR OPTIONAL 12- DISC CD CHANGER INOP (REPLACE WITH EXACT DESIGN RADIO OR CLUSTER PART NUMBER)

MODELS: 1995 OLDSMOBILE AURORA

CONDITION:

SOME OWNERS MAY EXPERIENCE ONE OR BOTH OF THE FOLLOWING CONDITIONS: 1) TIME RELATED FUNCTIONS OF THE DRIVER INFORMATION CENTER (DIC), SUCH AS ESTIMATED TIME OF ARRIVAL (ETA) AND DAY-MONTH DISPLAY, DO NOT OPERATE CORRECTLY. FOR MORE DETAIL, SEE "ADDITIONAL INFORMATION" BELOW. 2) THE RADIO WILL NOT OPERATE THE OPTIONAL 12-DISC CD CHANGER.

CAUSE:

DURING SERVICE PROCEDURES, AND/OR CD CHANGER INSTALLATION, INCORRECT AUDIO SYSTEM COMPONENTS ARE USED, CAUSING SYSTEM COMPATIBILITY PROBLEMS.

BECAUSE THE 1995 AURORA RELEASE WAS PULLED-AHEAD NEARLY SIX MONTHS (SPRING 94), APPROXIMATELY THE FIRST SIX MONTHS OF PRODUCTION USE 1994 RADIO AND CLUSTER PART NUMBERS. 1) THESE EARLY (1ST DESIGN) VEHICLES USED INSTRUMENT CLUSTERS THAT ARE NOT COMPATIBLE WITH THE LATER (2ND DESIGN) RADIOS. USING THIS COMBINATION WILL RESULT IN DIC TIME FUNCTION ERRORS. (FOR MORE DETAIL, SEE "ADDITIONAL INFORMATION" BELOW.)

2) THE 12-DISC CD CHANGER IS NOT COMPATIBLE WITH THE 1ST DESIGN BOSE RADIO (OR EITHER VERSION OF THE STANDARD UPO RADIO).

CORRECTION:

1) USE THE FOLLOWING PART NUMBER USAGE TABLE TO IDENTIFY THE CORRECT RADIO AND CLUSTER SERVICE PART NUMBERS FOR A PARTICULAR VEHICLE.

2) REFER TO THE FOLLOWING CD CHANGER COMPATIBILITY TABLE WHEN CHOOSING THE CORRECT CD CHANGER FOR A PARTICULAR VEHICLE.

PART NUMBER USAGE TABLE (VEHICLE DESIGN VERSION CAN BE IDENTIFIED BY LOOKING AT BUILD-DATE AND VIN NUMBER.) 1ST DESIGN 2ND DESIGN BUILD - DATE BEFORE 9-2-94 9-2-94 AND LATER VIN BREAKPOINT BEFORE 113167 113167 AND LATER* RADIO FACE GRAPHICS NO "THEFT LOCK" MAY HAVE "THEFT LOCK"** STD RADIO P/N (UPO) 16158913 16178113 BOSE RADIO P/N (UU8) 16158973 16178123** I/P P/N - US 16151343 OR 16219053*** 16151343 OR 16219053*** I/P P/N - CANADA 16151353 OR 16219063*** 16151353 OR 16219063***

* VEHICLES WITH VINS BETWEEN 113167 AND 119771 MAY HAVE BEEN BUILT WITH 2ND DESIGN RADIOS AND THE INCOMPATIBLE 1ST DESIGN CLUSTER. IF CLUSTER TIME PROBLEMS ARE NOTED, THE CLUSTER SHOULD BE REPLACED.

** SOME 2ND DESIGN BOSE RADIOS (P/N 16178123) DO NOT HAVE "THEFT LOCK" ON THE FACE-PLATE.

*** THE 2ND DESIGN CLUSTER WILL WORK IN 1ST DESIGN VEHICLES. AS A RESULT, AC DELCO CLUSTER REPAIR CENTERS WILL MODIFY ALL 1ST DESIGN CLUSTERS, UPGRADING THEM TO 2ND DESIGN FUNCTIONAL CAPABILITY. THUS, ALL SERVICE REPLACEMENT CLUSTERS WILL BE COMPATIBLE WITH BOTH 1ST AND 2ND DESIGN VEHICLES.

IMPORTANT: AC DELCO WILL NOT PROVIDE A PART RETURN CREDIT, UNLESS THE RETURNED PART NUMBER IS IDENTICAL TO THE EXCHANGE UNIT THAT WAS ORDERED. MAKE SURE TO VERIFY THE CORRECT PART NUMBER BEFORE ORDERING.

CD CHANGER COMPATIBILITY TABLE CUSTOMERS WISHING TO ADD MULTI-DISC CD CHANGER CAPABILITY SHOULD REFER TO THE FOLLOWING CHART.

DESIGN VER. RADIO TYPE/RPO RADIO P/N USE CHNGR TYPE CD CHNGR P/N 1ST DESIGN STD/UPO 16158913 USE 10 DISC 12344632* 1ST DESIGN BOSE/UU8 16158973 USE 10 DISC 12344632* 2ND DESIGN STD/UPO 16178113 USE 10 DISC 12344632* 2ND DESIGN BOSE/UU8 16178123 USE 12 DISC 12343958**

* CHANGER SENDS AUDIO TO RADIO VIA FM INTERFACE. INSTALLATION REQUIRES HARNESS ADAPTER PART NUMBERS 16169571 AND 16169611. ** CHANGER SENDS AUDIO SIGNAL TO RADIO VIA A LOW-LEVEL AUDIO CONNECTION IN THE WIRING HARNESS. INSTALLATION REQUIRES HARNESS ADAPTER PART NUMBER 12344003.

PARTS INFORMATION:

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO AND AC DELCO EXCHANGE CENTERS.

ADDITIONAL INFORMATION

CD CHANGER COMPATIBILITY THE RADIO SHOULD NOT BE CHANGED IN ORDER TO ACHIEVE 12-DISC CD CHANGER COMPATIBILITY, BECAUSE: 1) NEITHER VERSION OF THE STANDARD DUAL-PLAYBACK RADIO (UPO) IS COMPATIBLE WITH THE 12-DISC CHANGER. ONLY THE 2ND DESIGN BOSE (UU8) CAN BE USED WITH THE 12-DISC. 2) RETROFITTING A 2ND DESIGN BOSE (UU8) RADIO INTO A EARLY BUILD VEHICLE WILL CAUSE DIC PROBLEMS. THESE CAN BE CORRECTED ONLY BY ALSO REPLACING THE INSTRUMENT CLUSTER. 3) DEALERS ATTEMPTING TO RETURN 1ST DESIGN RADIOS IN EXCHANGE FOR 2ND DESIGN PARTS WILL NOT RECEIVE RETURN CREDIT.

SYMPTOMS - CLUSTER TIME FUNCTION ERRORS THIS CONDITION IS CAUSED WHEN THE CLUSTER'S INTERNAL CLOCK IS NO LONGER SYNCHRONIZED WITH THE RADIO CLOCK. THIS OCCURS WHEN THE RADIO CLOCK IS RESET BY THE CUSTOMER. NORMALLY, A DATA MESSAGE BETWEEN THE RADIO AND CLUSTER WILL REESTABLISH SYNCHRONIZATION BETWEEN THE CLOCKS. HOWEVER, IF THE WRONG CLUSTER OR RADIO PART NUMBER IS INSTALLED, A SOFTWARE ANOMALY MAY CAUSE THE CLUSTER CLOCK SYNCHRONIZATION TO BE DELAYED FOR UP TO EIGHT DAYS.

WHILE THE CLUSTER INTERNAL CLOCK IS NOT SYNCHRONIZED, THE CUSTOMER MAY NOTICE THE FOLLOWING SYMPTOMS: 1) THE DIC DISPLAY SHOWS THE INCORRECT ESTIMATED TIME OF ARRIVAL. 2) THE DIC DATE CHANGES BEFORE OR AFTER THE RADIO CLOCK READS MIDNIGHT (12:00 A.M.).

REMEMBER, THE CUSTOMER WILL OBSERVE THE ABOVE SYMPTOMS FOR ONLY 1 - 8 DAYS AFTER RESETTING THE RADIO CLOCK. AFTER THAT TIME PERIOD, THE CLOCK WILL REACHIEVE SYNCHRONIZATION AND THE SYMPTOMS WILL DISAPPEAR. THIS CONDITION CAN BE ENTIRELY ELIMINATED BY ENSURING THAT THE RADIO AND CLUSTER PART NUMBERS ARE MATCHED, PER THE ABOVE PART NUMBER USAGE TABLE.

FIGURES: 0

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.