CAMPAIGN: ANTI-FREEZE MIXTURE INSUFFICIENT CONCENTRATION

TO : ALL CHEVROLET/GEO DEALERS

SUBJECT : INSUFFICIENT ANTIFREEZE CONCENTRATION

MODELS : 1991 GEO PRIZM, GEO PRIZM GSI, GEO PRIZM LSI

CHEVROLET HAS DETERMINED THAT ON CERTAIN 1991 GEO PRIZM MODELS THE ENGINE COOLANT MAY BE LESS THAN THE SPECIFIED 50-50 ETHYLENE GLYCOL TO WATER CONCENTRATION. CONCENTRATIONS AS LOW AS 20-80 MAY HAVE RESULTED. THIS WILL ACHIEVE A FREEZING POINT OF ONLY +16 DEGREES FAHRENHEIT.

TO CORRECT THIS CONDITION DEALERS ARE TO FOLLOW THE SERVICE PROCEDURE BELOW.

VEHICLES INVOLVED

NOTE: INVOLVED DEALER CODES AND VIN'S ARE ATTACHED.

NO OWNER LETTER WILL BE SENT SINCE THE VEHICLES SHOULD BE IN DEALER NEW VEHICLE INVENTORY. IF ANY UNITS HAVE BEEN DELIVERED OR DEALER TRANSFERRED, PLEASE IMMEDIATELY CONTACT RESPECTIVE PURCHASER OR DEALER TO HAVE CAMPAIGN REPAIRS PERFORMED.

PARTS INFORMATION

AUTOMATIVE ETHYLENE GLYCOL BASED ANTIFREEZE IS TO BE OBTAINED FROM LOCAL SUPPLIERS AS REQUIRED TO COMPLETE THIS CAMPAIGN.

SERVICE PROCEDURE

MEASURE THE COOLANT STRENGTH WITH A HYDROMETER OR REFRACTOMETER. IF THE PROJECTION LEVEL IS NOT EQUAL TO (MINUS) -37 DEGREES FAHRENHEIT OR BELOW, DRAIN TWO QUARTS OF COOLANT FROM THE RADIATOR AND ADD TWO QUARTS OF AUTOMOTIVE ETHYLENE GLYCOL BASED ANTIFREEZE TO THE COOLING SYSTEM. INSTALL CAMPAIGN IDENTIFICATION LABEL.

CAMPAIGN IDENTIFICATION LABEL

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

EACH "CAMPAIGN IDENTICIATION 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.

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

CLAIM INFORMATION

SUBMIT A PRODUCT CAMPAIGN CLAIM WITH THE INFORMATION INDICATED BELOW:

* ** REPAIR PARTS LABOR LAB OTH NET PERFORMED PC ALLOW CC/FC OP HRS HRS AMT --------- ------ ----- ----- ----- --- --- --- BRING COOLANT -- --- SK-00 V6540 0.3 0.1 $#.## PROTECTION TO -37 DEGREES F.

* CAMPAIGN ADMINISTRATIVE ALLOWANCE OF 0.1 HRS

** THE 'NET AMOUNT' COLUMN SHOULD REPRESENT THE TWO QUARTS OF AUTOMOTIVE ETHYENE GLYCOL BASED ANTIFREEZE USED IN CONJUNCTION WITH THE ABOVE LABOR OPERATION.

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

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

CLAIMS SUBMISSION SHOULD COMMENCE ON JANUARY 10, 1991.

PLEASE COMMUNICATE THIS INFORMATION TO YOUR SERVICE AND PARTS MANAGER.

LIST OF INVOLVED DEALERS AND V.I.N.'S

DLRCD V.I.N. DLRC V.I.N. DLRC V.I.N. -------------- -------------- -------------- 00046-MZ023232 00500-MZ022790 00586-MZ022914 02017-MZ023575 02094-MZ023066 02123-MZ021777 02127-MZ021602 02144-MZ022952 02144-MZ023060 02229-MZ023260 02304-MZ023082 02457-MZ022181 04437-MZ022202 04782-MZ022798 05198-MZ023070 06470-MZ022730 06470-MZ022784 06632-MZ023375 06632-MZ023126 06632-MZ023063 06632-MZ023105 07354-MZ023216 07549-MZ023236 07549-MZ022912 07549-MZ022935 07549-MZ023004 07549-MZ022996 08038-MZ023603 08182-MZ023184 08258-MZ022649 08388-MZ022832 11049-MZ023528 11223-MZ021594 11293-MZ023620 11425-MZ022961 11530-MZ023495 14472-MZ023212 14509-MZ023080 15261-MZ022610 16060-MZ023379 16330-MZ023283 17039-MZ021655 17039-MZ022404 20023-MZ023032 20023-MZ023357 20088-MZ023483 20088-MZ023217 20178-MZ023303 20179-MZ023390 20178-MZ023367 20398-MZ023190 26345-MZ023441 26345-MZ023438 26345-MZ023430 26345-MZ023423 26345-MZ023420 26345-MZ023418 26345-MZ023417 26345-MZ023410 26345-MZ023407 26345-MZ023480 26345-MZ023477 26345-MZ023472 26345-MZ023467 26345-MZ023386 26345-MZ023384 26345-MZ023381 26345-MZ023374 26345-MZ023373 26345-MZ023371 26345-MZ023369 26345-MZ023361 26345-MZ023351 26345-MZ023347 26345-MZ023345 26345-MZ023339 26345-MZ023338 26345-MZ023331 26345-MZ023324 26345-MZ023322 26345-MZ023316 26345-MZ023313 26345-MZ023312 26345-MZ023305 26345-MZ023302 26345-MZ023300 26345-MZ023295 26345-MZ023294 26345-MZ023289 26345-MZ023287 26345-MZ023285 26345-MZ023284 26345-MZ023281 26345-MZ023279 26345-MZ023277 26345-MZ023274 26345-MZ023273 26345-MZ023269 26345-MZ023263 26345-MZ023258 26345-MZ023256 26345-MZ023255 26345-MZ023249 26345-MZ023248 26345-MZ023246 26345-MZ023242 26345-MZ023234 26345-MZ023227 26345-MZ023219 26345-MZ023214 26345-MZ023213 26345-MZ023211 26345-MZ023209 26345-MZ023198 26345-MZ023195 26345-MZ023193 26345-MZ023187 26345-MZ023185 26345-MZ023176 26345-MZ023173 26345-MZ023168 26345-MZ023165 26345-MZ023163 26345-MZ023160 26345-MZ023154 26345-MZ023153 26345-MZ023148 26345-MZ023145 26345-MZ023142 26345-MZ023138 26345-MZ023137 26345-MZ023135 26345-MZ023134 26345-MZ023132 26345-MZ023127 26345-MZ023122 26345-MZ023120 26345-MZ023116 26345-MZ023115 26345-MZ023112 26345-MZ023106 26345-MZ023104 26345-MZ023101 26345-MZ023096 26345-MZ023094 26345-MZ023092 26345-MZ023091 26345-MZ023087 26345-MZ023086 26345-MZ023075 26345-MZ023071 26345-MZ023064 26345-MZ023057 26345-MZ023056 26345-MZ023053 26345-MZ023052 26345-MZ023050 26345-MZ023046 26345-MZ023043 26345-MZ023033 26345-MZ023031 26345-MZ023028 26345-MZ023027 26345-MZ023021 26345-MZ023015 26345-MZ023012 26345-MZ023009 26345-MZ023005 26345-MZ023001 26345-MZ022997 26345-MZ022984 26345-MZ022983 26345-MZ022973 26345-MZ022953 26345-MZ022951 26345-MZ022944 26345-MZ022940 26345-MZ022932 26345-MZ023404 26345-MZ023399 26345-MZ023395 26345-MZ023394 26345-MZ022826 26345-MZ022821 26345-MZ022785 26345-MZ023618 26345-MZ023595 26345-MZ023592 26345-MZ023589 26345-MZ023588 26345-MZ023586 26345-MZ023584 26345-MZ023582 26345-MZ023580 26345-MZ023567 26345-MZ023556 26345-MZ023549 26345-MZ023544 26345-MZ023525 26345-MZ023522 26345-MZ022518 26345-MZ022513 26345-MZ022499 26345-MZ023491 26345-MZ023388 26345-MZ022916 26345-MZ023462 26345-MZ023405 26480-MZ022035 26500-MZ021581 30148-MZ023235 32036-MZ023207 32108-MZ023121 32203-MZ023594 32354-MZ023280 32363-MZ023350 32503-MZ022865 44000-MZ021705 44007-MZ022858 44235-MZ023130 44294-MZ023044 44405-MZ021801 44405-MZ022467 44405-MZ023508 44447-MZ023118 44528-MZ021865 48031-MZ022237 48149-MZ023084 48482-MZ023095 END OF VINS

*** CHEVROLET DISCLAIMER ***

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.