CAMPAIGN: ENHANCE MEMCAL 1993 C/K TRUCKS

PRODUCT CAMPAIGN 93C01 ENHANCED MEM-CAL

MODEL & YEAR: 1993 C/K TRUCK WITH 5.0L ENGINES (L03)& 4-SPEED AUTOMATIC TRANSMISSION (M30)

IMPORTANT: CAMPAIGN 93C01

RETAIN THIS DCS ADMINISTRATIVE MESSAGE WITH DEALER CAMPAIGN BULLETINS. A DEALER BULLETIN WILL NOT BE PRINTED BY CHEVROLET MOTOR DIVISION.

GENERAL MOTORS HAS INSTALLED AN ENHANCED MEMORY CALIBRATION IN 1993 CHEVROLET TRUCKS EQUIPPED WITH 5.OL ENGINES (L03) AND 4-SPEED AUTOMATIC TRANSMISSIONS (M30) BUILT AFTER JULY 17, 1992. DEALERS ARE TO INSTALL THE ENHANCED MEM-CAL THAT HAS BEEN PROVIDED ACCORDING TO THE VEHICLE TYPE, AXLE RATIO AND LOCATION (CALIFORNIA/FEDERAL) PRIOR TO DELIVERY. IF A VEHICLE HAS BEEN SOLD, CONTACT THE OWNER TO MAKE THIS CORRECTION.

VEHICLES INVOLVED:

INVOLVED ARE CERTAIN 1991 C/K TRUCKS. DEALER CODES AND VEHICLES INVOLVED ARE LISTED BELOW:

NEW OLD DEALER VIN MEM-CAL MEM-CAL

02003 2GCEC19H1P1102787 BDFL BBLL 02269 2GCEC19H2P1102748 BDFL BBLL 02329 2GCEC19H3P1101916 BDFK BBLK 03519 2GCFC29H9P1102644 BDFK BBLK 04248 2GCEC19HXP1100312 BDFL BBLL 04286 2GCEK19H2P1102607 BDFL BBLL 04286 2GCEK19H7P1100402 BDFL BBLL 04596 2GCEK19H1P1102940 BDFK BBLK 04596 2GCEK19H3P1101188 BDFK BBLK 04608 2GCEK19H5P1102990 BDFK BBLK 04790 2GCEK19HXP1100488 BDFK BBLK 04793 2GCEC19HXP1102142 BDFL BBLL 06472 2GCEC19H6P1100341 BDFT BBLT 06530 2GCEC19H0P1102313 BDFT BBLT 06573 2GCEC19H1P1102210 BDFT BBLT 06596 2GCEC19HXP1100083 BDFT BBLT 07021 2GCEC19H2P1101695 BDFL BBLL 07021 2GCEC19H3P1101978 BDFL BBLL 07021 2GCEC19HXP1101959 BDFL BBLL 07075 2GCEC19H9P1102052 BDFL BBLL 07244 2GCEC19H0P1101839 BDFL BBLL 07244 2GCEC19H5P1101707 BDFL BBLL 07297 2GCEC19H1P1101980 BDFL BBLL 07335 2GCEC19H5P1102128 BDFL BBLL 07345 2GCEC19H3P1101849 BDFL BBLL 07345 2GCEC19H6P1101344 BDFL BBLL 07348 2GCEC19H0P1101758 BDFL BBLL 07348 2GCEC19H4P1101603 BDFL BBLL 07348 2GCEC19H5P1101643 BDFL BBLL 07354 2GCEC19H3P1101334 BDFL BBLL 07501 2GCEC19HXP1100150 BDFL BBLL 07525 2GCEC19H7P1101806 BDFL BBLL 07587 2GCEC19H3P1102760 BDFL BBLL 07629 2GCEC19H8P1100793 BDFL BBLL 07956 2GCEC19H4P1102749 BDFL BBLL 07956 2GCEC19H4P1102816 BDFL BBLL 07956 2GCEC19H7P1101644 BDFL BBLL 08035 2GCEC19H6P1100338 BDFL BBLL 08166 2GCEC19HXP1100262 BDFK BBLK 08182 2GCEC19HXP1100813 BDFK BBLK 08203 2GCEC19H3P1100927 BDFK BBLK 08384 2GCEC19H4P1100628 BDFL BBLL 08398 2GCEC19H3P1100720 BDFL BBLL 08450 2GCEC19H4P1101195 BDFK BBLK 09108 2GCEC19H3P1102161 BDFK BBLK

NEW OLD

09349 2GCEC19H1P1100417 BDLL BDFL 09415 2GCEC19H4P1101570 BDFL BBLL 09415 2GCEC19H7P1100087 BDFL BBLL 11280 2GCEC19HXP1100777 BDFL BBLL 13142 2GCEC19H3P1100507 BDFL BBLL 13143 2GCEC19H2P1101390 BDFL BBLL 14185 2GCEC19H8P1100647 BDFL BBLL 14185 2GCEC19H0P1101453 BDFL BBLL 14290 2GCEK19H5P1100981 BDFL BBLL 14368 2GCEC19H4P1100340 BDFL BBLL 15052 2GCEK19H9P1102152 BDFK BBLK 15247 2GCEC19H5P1100105 BDFL BBLL 15419 2GCEC19HXP1102397 BDFL BBLL 16205 2GCEC19H0P1102747 BDFK BBLK 16656 2GCEK19H7P1100755 BDFK BBLK 16785 2GCEC19H1P1101218 BDFK BBLK 16785 2GCEC19H5P1101271 BDFK BBLK 17023 2GCEC19H5P1100475 BDFL BBLL 17034 2GCEC19H4P1100158 BDFK BBLK 17059 2GCEC19H3P1101169 BDFL BBLL 17378 2GCEC19H1P1100392 BDFK BBLK 17378 2GCEC19H2P1100420 BDFK BBLK 17378 2GCEC19H3P1100362 BDFK BBLK 17378 2GCEC19H3P1101267 BDFK BBLK 17378 2GCEC19H4P1102167 BDFK BBLK 17378 2GCEC19H9P1100348 BDFK BBLK 17378 2GCEC19H9P1101323 BDFK BBLK 17386 2GCEC19H3P1102077 BDFK BBLK 17386 2GCEC19H4P1101021 BDFK BBLK 17386 2GCEC19H591100573 BDFK BBLK 17386 2GCEC19H6P1100078 BDFK BBLK 17466 2GCEC19H0P1103025 BDFL BBLL 17474 2GCEC19H3P1102239 BDFK BBLK 17569 2GCEC19H4P1100905 BDFK BBLK 17788 2GCEC19H2P1102698 BDFL BBLL 17888 2GCEC19H7P1100865 BDFL BBLL 20052 2GCEC19H5P1102887 BDFT BBLT 20052 2GCEC19H8P1102382 BDFT BBLT 20052 2GCEC19HXP1102352 BDFT BBLT 20079 2GCEC19HBP1101250 BDFT BBLT 20095 2GCEC19H7P1101238 BDFT BBLT 20095 2GCEC19H9P1101029 BDFT BBLT 20095 2GCEC19H9P1101144 BBFT BBLT 20127 2GCEC19H1P1100764 BDFT BBLT 20131 2GCEC19H3P1102807 BDFT BBLT 20131 2GCEC19H9P1102780 BDFT BBLT 20186 2GCEC19HXP1101153 BDFT BBLT 20216 2GCEC19H1P1101168 BDFT BBLT 20232 2GCEC19H5P1100167 BDFS BBLS 20255 2GCEC19H1P1100702 BDFL BBLL 20333 2GCEC19H0P1100058 BDFS BBLS 20333 2GCEC19H8P1101801 BDFT BBLT 20333 2GCEC19H0P1100190 BDFS BBLS 20385 2GCEC19H7P1100767 BDFT BBLT

NEW OLD

20404 2GCEC19H2P1101700 BDFT BBLT 20466 2GCEC19H0P1100822 BDFT BBLT 20466 2GCEC19H2P1100868 BDFT BBLT 20518 2GCEC19H6P1100145 BDFS BBLS 20522 2GCEC19H1P1101090 BDFT BBLT 20522 2GCEC19H4P1101052 BDFT BBLT 20522 2GCEC19HXP1100682 BDFT BBLT 20530 2GCEC19H3P1102127 BDFT BBLT 20654 2GCEC19H8P1100809 BDFT BBLT 20999 2GCEC19H5P1100931 BDFT BBLT 26039 2GCEC19H0P1101291 BDFL BBLL 26046 2GCEC19H2P1100109 BDFL BBLL 26054 2GCEC19H9P1100205 BDFL BBLL 26061 2GCEC19H5P1100489 BDFK BBLK 26201 2GCEC19H6P1101893 BDFK BBLK 26386 2GCEC19H9P1102407 BDFL BBLL 26391 2GCEC19H1P1100067 BDFL BBLL 26424 2GCEC19H1P1101641 BDFL BBLL 26463 2GCEC19H4P1102279 BDFL BBLL 26493 2GCEC19H8P1102687 BDFL BBLL 26493 2GCEK19H7P1102537 BDFL BBLL 30012 2GCEC19H0P1102019 BDFL BBLL 30012 2GCEC19H7P1101904 BDFL BBLL 30012 2GCEC19H7P1101935 BDFL BBLL 30012 2GCEC19H8P1101751 BDFL BBLL 30012 2GCEC19H0P1101551 BDFL BBLL 30045 2GCEC19H0P1101744 BDFL BBLL 30045 2GCEC19H2P1102118 BDFL BBLL 30045 2GCEC19H4P1101794 BDFL BBLL 30045 2GCEC19H5P1101433 BDFL BBLL 30045 2GCEC19H6P1102168 BDFL BBLL 30065 2GCEC19H1P1102935 BDFL BBLL 30111 2GCEC19H8P1101460 BDFL BBLL 30111 2GCEC19HXP1100472 BDFL BBLL 30120 2GCEC19H4P1102976 BDFL BBLL 30132 2GCEC19H1P1102109 BDFK BBLK 30132 2GCEC19H3P1102564 BDFK BBLK 30132 2GCEC19H5P1102677 BDFK BBLK 30145 2GCEC19H2P1102572 BDFK BBLK 30145 2GCEC19H7P1102325 BDFK BBLK 30145 2GCEC19H8P1102172 BDFK BBLK 30148 2GCEC19H2P1101762 BDFL BBLL 30148 2GCEC19H2P1101793 BDFL BBLL 30148 2GCEC19H6P1101487 BDFL BBLL 30148 2GCEC19H7P1101434 BDFL BBLL 30148 2GCEC19H9P1101726 BDFL BBLL 30161 2GCEC19H3P1102743 BDFK BBLK 30190 2GCEC19H7P1102700 BDFK BBLK 30240 2GCEC19H1P1101655 BDFL BBLL 30240 2GCEC19H3P1101981 BDFL BBLL 30240 2GCEC19H6P1101845 BDFL BBLL 30240 2GCEC19H7P1101448 BDFL BBLL 30240 2GCEC19H7P1101885 BDFL BBLL 30240 2GCEC19H9P1101578 BDFL BBLL 30300 2GCEC19H0P1102408 BDFL BBLL

30360 2GCEC19H0P1102344 BDFL BBLL 30360 2GCEC19H0P1102442 BDFL BBLL 30360 2GCEC19H2P1102569 BDFL BBLL 30360 2GCEC19H2P1102846 BDFL BBLL 30360 2GCEC19H3P1102855 BDFL BBLL 30360 2GCEC19H5P1102422 BDFL BBLL 30375 2GCEC19H7P1101983 BDFL BBLL 30384 2GCEC19H6P1100677 BDFL BBLL 30384 2GCEC19H7P1100686 BDFL BBLL 30384 2GCEC19H9P1102696 BDFL BBLL 30401 2GCEC19H7P1102440 BDFK BBLK 30406 2GCEC19H3P1102225 BDFL BBLL 30406 2GCEC19H8P1102818 BDFL BBLL 30406 2GCEC19H9P1102584 BDFL BBLL 30412 2GCEC19H2P1102474 BDFL BBLL 30412 2GCEC19H5P1102467 BDFL BBLL 30453 2GCEC19H5P1100704 BDFK BBLK 30644 2GCEC19H2P1102264 BDFL BBLL 30644 2GCEC19H5P1102713 BDFL BBLL 30644 2GCEC19H7P1102356 BDFL BBLL 30644 2GCEC19H7P1102437 BDFL BBLL 30644 2GCEC19H8P1102303 BDFL BBLL 30657 2GCEC19H0P1100528 BDFL BBLL 30687 2GCEC19H3P1100068 BDFK BBLK 30710 2GCEC19H1P1102272 BDFL BBLL 30710 2GCEC19H1P1102501 BDFL BBLL 30710 2GCEC19H6P1102249 BDFL BBLL 30719 2GCEC19H3P1101897 BDFK BBLK 30719 2GCEC19H5P1102355 BDFK BBLL 30719 2GCEC19H6P1101375 BDFK BBLK 30719 2GCEC19H8P1102317 BDFK BBLK 30725 2GCEC19H8P1102897 BDFK BBLK 30725 2GCEC19H9P1102763 BDFK BBLK 32040 2GCEC19H9P1101676 BDFL BBLL 32120 2GCEK19H3P1100123 BDFK BBLK 48041 2GCEC19H8P1102978 BDFL BBLL 48105 2GCEK19HXP1101964 BDFL BBLL 48277 2GCEK19H1P1100122 BDFK BBLK 48312 2GCEC19H2P1100160 BDFK BBLK 48354 2GCEC19H5P1100279 BDFL BBLL 59684 2GCEC19H1P1102112 BDFK BBLK 59684 2GCEC19H5P1102100 BDFK BBLL 59684 2GCEC19H6P1101070 BDFK BBLK 59684 2GCEC19H7P1101000 BDFK BBLK 59684 2GCEC19H8P1102799 BDFK BBLK 59684 2GCEC19H9P1102326 BDFK BBLK

DEALER CAMPAIGN RESPONSIBILITY:

DEALERS ARE TO CORRECT ALL AFFECTED VEHICLES IN NEW VEHICLE STOCK PRIOR TO THEIR SALE. SHOULD VEHICLES BE SOLD INADVERTENTLY FROM YOUR NEW VEHICLE INVENTORY, PRIOR TO REPAIR, OWNERS ARE TO BE CONTACTED BY THE DEALER AND ARRANGEMENTS MADE TO MAKE THE REQUIRED CORRECTION ACCORDING TO INSTRUCTIONS CONTAINED IN THIS CAMPAIGN MESSAGE.

DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN, AT NO CHARGE TO OWNERS, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP, FROM THIS TIME FORWARD.

OWNER NOTIFICATION:

THERE WILL BE NO OWNER LETTER SENT OUT WITH THIS CAMPAIGN. IT IS ANTICIPATED THE VEHICLES SHOULD STILL BE IN YOUR NEW VEHICLE INVENTORY AND SHOULD BE REPAIRED PRIOR TO RETAIL SALE. IF A UNIT HAS BEEN RETAILED OR DEALER TRANSFERRED, PLEASE CONTACT THE RESPECTIVE PURCHASER OR DEALER TO HAVE THE CAMPAIGN REPAIR PERFORMED.

PARTS INFORMATION:

PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ARE BEING SHIPPED DIRECT TO INVOLVED DEALERS BY CHEVROLET ON A NO CHARGE BASIS. PARTS ARE EXPECTED TO BE SHIPPED AUGUST 14, 1992 VIA OVERNIGHT MAIL. THE CORRECT MEM-CAL FOR EACH APPLICATION IS IDENTIFIED BY A FOUR LETTER BROADCAST CODE AS LISTED IN THE "VEHICLES INVOLVED" SECTION OF THIS MESSAGE.

SERVICE PROCEDURE:

1. DISCONNECT NEGATIVE BATTERY CABLE.

2. DISCONNECT CONNECTORS FROM ECM/PCM.

3. REMOVE ECM/PCM MOUNTING HARDWARE.

4. REMOVE ECM/PCM FROM PASSENGER COMPARTMENT.

5. REMOVE ECM/PCM ACCESS COVER.

6. REMOVE MEM-CAL. IMPORTANT: USING TWO FINGERS, PUSH BOTH RETAINING CLIPS BACK AWAY FROM THE MEM-CAL. AT THE SAME TIME, GRASP IT AT BOTH ENDS AND LIFT IT UP OUT OF THE SOCKET. USE OF UNAPPROVED MEM-CAL REMOVAL METHODS MAY CAUSE DAMAGE TO THE ECM/PCM SOCKET.

7. INSTALL NEW MEM-CAL. IMPORTANT: PRESS ONLY ON THE ENDS OF THE MEM-CAL. SMALL NOTCHES IN THE MEM-CAL MUST BE ALIGNED WITH THE SMALL NOTCHES IN THE MEM-CAL SOCKET. GENTLY PRESS DOWN ON THE ENDS OF THE MEM-CAL UNTIL CLIPS ARE AGAINST THE SIDE OF THE MEM-CAL. PRESS INWARD ON THE CLIPS UNTIL THEY SNAP INTO PLACE. LISTEN FOR THE CLICK.

8. INSTALL ACCESS COVER ON ECM/PCM.

9. CONNECT CONNECTORS TO ECM/PCM.

10. MAKE FUNCTIONAL CHECK

A. TURN IGNITION ON.

B. WITH CAVITIES A & B SHORTED AT ALDL CONNECTOR, CODE 12 SHOULD FLASH FOUR TIMES (IF NO OTHER CODES ARE PRESENT). THIS INDICATES THE MEM-CAL IS INSTALLED PROPERLY, AND THE ECM/PCM FUNCTIONING.

11. INSTALL ECM/PCM IN VEHICLE USING MOUNTING HARDWARE REMOVED IN STEP 3 (1.6 - 2.2 NM).

12. CONNECT NEGATIVE BATTERY CABLE (10.2 - 20.0 NM).

13. INSTALL CAMPAIGN IDENTIFICATION LABEL.

CAMPAIGN IDENTIFICATION LABEL:

EACH VEHICLE CORRECTED IN ACCORDANCE WITH THE INSTRUCTIONS OUTLINED IN THIS CAMPAIGN WILL REQUIRE A "CAMPAIGN IDENTIFICATION LABEL". EACH LABEL PROVIDES A SPACE TO INCLUDE THE CAMPAIGN NUMBER AND THE FIVE (5) DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS INFORMATION MAY BE INSERTED WITH A TYPEWRITER OR A BALL POINT PEN.

EACH "CAMPAIGN IDENTIFICATION LABEL" IS TO BE LOCATED ON THE RADIATOR CORE SUPPORT IN AN AREA WHICH WILL BE VISIBLE WHEN THE VEHICLE IS BROUGHT IN FOR PERIODIC SERVICING BY THE OWNER. ADDITIONAL "CAMPAIGN IDENTIFICATION LABELS" CAN BE OBTAINED FROM DAC.

APPLY "CAMPAIGN IDENTIFICATION LABEL" ONLY ON A CLEAN, DRY SURFACE.

CLAIM INFORMATION:

SUBMIT A PRODUCT CLAIM WITH THE INFORMATION INDICATED BELOW AFTER AUGUST 31, 1992. * ** REPAIR PARTS LABOR LAB OTH NET PERFORMED PC ALLOW CC/FC OP HRS HRS AMT --------------- -- ------ ----- ----- --- --- ------ REPLACE MEM-CAL - - - SK-00 V7660 0.3 0.1 $6.90

* CAMPAIGN ADMINISTRATIVE ALLOWANCE.

** THE $6.90 IDENTIFIED IN THE "NET AMOUNT COLUMN" REPRESENTS 30% OF THE CURRENT GMSPO DEALER NET PRICE FOR MEM-CAL SHIPPED DIRECT TO DEALERS BY CHEVROLET USED IN CONJUNCTION WITH LABOR OPERATION V7660.

DEALERS WILL AUTOMATICALLY RECEIVE THE CORRECT LABOR TIME AND MATERIAL ALLOWANCE BASED ON THE LABOR OPERATION PERFORMED.

REFER TO THE CHEVROLET CLAIMS PROCESSING MANUAL FOR DETAILS ON PRODUCT CAMPAIGN CLAIM SUBMISSION.

PLEASE COMMUNICATE THIS INFORMATION TO THE DEALER OPERATOR AND YOUR SALES, SERVICE, AND PARTS MANAGER UPON RECEIPT. EDWARD JOHNSON MANAGER - DEALER OPERATIONS

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.