CAMPAIGN: ENGINE OIL COOLER LINES MAY FAIL
MODELS: 1985 C/K/C/P Light Duty Model Trucks Equipped With an Engine Oil Cooler
TO: ALL AFFECTED DEALERS:
DEFECT INVOLVED:
General Motors has determined that some 1985 C/K/G/P Light Duty trucks equipped with a gasoline engine or a 6.2L Diesel engine that have an engine oil cooler, RPO KC4, may experience failure of the engine oil cooler hose/hoses. During normal operation the hoses may burst, resulting in a rapid engine oil loss which could result in internal engine damage.
To prevent the possibility of this condition occurring, involved vehicles must be inspected for suspect oil cooler lines and replacement lines installed if necessary.
VEHICLES INVOLVED:
Involved are certain 1985 C/K/G,'P light Duty model trucks equipped with an engine oil cooler. The oil cooler is available on some involved vehicles equipped with gas engines and is standard on P35 Models equipped with a 7.4L engine (RPO LE8) or on 6.2L diesel (RPO LH6 or LL4) equipped vehicles.
The vehicles involved were built within the following plant and VIN breakpoints.
GMC
Model Plant From Through ----- ----- ---- ------- P-Model Detroit F3501174 F3503744
G-Van Lordstown F7503064 F7506234 Scarborough F4502038 F4507318
C/K Flint-line #1 FF734897 FF708182 Flint-line #2 FF505683 FF510664 Janesville FJ507643 FJ508455 St. Louis FS5O4920 FS509734 Oshawa F11513249 F1513641
CHEV
Model Plant From Through ----- ----- ---- ------- P-Model Detroit F3308157 F3313189
G-Van Lordstown F7113572 F7127667 Scarborough F4106076 F4119332
C/K Flint-line #1 FF320076 FF339542 Flint-line #2 FF115048 FF127844 Janesville FJ123335 FJ126924 St. Louis FS115388 FS128599 Oshawa F1136523 F1137392
All affected vehicles have been identified by the VIN listing provided to involved Dealers with this bulletin. Any Dealer not receiving a listing was not shipped any of the affected vehicles.
DEALER CAMPAIGN RESPONSIBILITY:
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. Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your Dealership for service in the future, you should take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle. Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the Dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.
CAMPAIGN PROCEDURE:
Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.
OWNER NOTIFICATION:
All owners of record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors. The listings provided are for campaign activity only and should not be used for any other purpose.
PARTS INFORMATION:
Parts required for this Recall should be obtained through regular channels as follows:
Additional Part Required Number Description Application Equipment ------ ----------- ------------ --------- 14054350 Inlet Oil Cooler Line P-Model LL4 (6.2L Diesel)
14054372 Inlet oil Cooler Line P-Model LT9 (5.7L Gas) & 14054373 OUtlet Oil Cooler Line KC4 (Engine Oil Cooler) 15595588 Inlet 0i1 Cooler Line P 35 Model LE8 (7.4L Gas) 15595589 outiet Oil Cooler Line
15595994 Inlet Oil Cooler Line G-Van LL4 & LH6 15595995 Outlet Oil Cooler Line (6.2L Diesel)
15598396 Inlet Oil Cooler Line G-Van LT9 or LS9 (5.7L 15598397 Outlet Oil Cooler Line Gas) or LF3 or LE9 (5.0L Gas) & KC4 (Engine Oil Cooler) 15592917 Inlet Oil Cooler Line G-Van LB1 (4.3L Gas) & KC4 (Engine oil Cooler) 14055584 Outlet Oil Cooler Line K-Model KC4 (Engine oil Cooler) 14061346 Inlet Oil Cooler Line K-Model LL4 or LH6 14061347 Outlet Oil Cooler Line (6.2L Diesel)
14061346 Inlet Oil Cooler Line C-Model LL4 or LH6 14061347 Outlet Oil Cooler Line (6.2L Diesel)
15522436 Inlet Oil Cooler Line C-Model LB1 (4.3L Gas) & 15522437 Outlet Oil Cooler Line KC4 (Engine Oil Cooler) 14055581 Inlet Oil Cooler Line C-Model KC4 (Engine Oil 14055582 Outlet Oil Cooler Line Cooler)
PARTS AND LABOUR CLAIM INFORMATION:
Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or RAPID terminal transmission in accordance with the following:
Repair Code Operation Time Allowance ------------ --------- -------------- 1A Inspect engine oil coolor lines. .3 Vehicle not involved.
6A Inspect engine oil cooler lines. .6 Replace one cooler line.
Add: G-Vans only .2
6A Inspect engine oil cooler lines. .7 Replace both cooler lines.
Add: G-Vans only .2
Time allowance includes 0.1 hour for Dealer administrative detail associated with this campaign. Parts credit will be based on dealer net plus 30% to cover parts handling.
SERVICE PROCEDURE
Inspect both engine oil cooler lines for manufacturing date code (reference the 1985 Light Duty Truck Service Manual, X-8532, for cooler line location). Lines marked with a date code of 2654, as shown in Figure No. 1, must be replaced. In addition, replace the cooler line if the date code cannot be read or if the date code does not appear on the hose section of the line.
Lines with identification numbers other than above are OK and are not to be replaced.
INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL
Clean surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.
Dear General Motors Customer:
General Motors has determined that some 1985 C/K/G/P Light Duty trucks equipped with a gasoline engine or a 6.2L diesel engine that have an engine oil cooler, RPO KC4, may experience failure of the engine oil cooler hose/hoses. During normal operation the hoses may burst, resulting in a rapid engine oil loss which could result in internal engine damage.
To prevent the possibility of this condition occurring in your vehicle, please contact your GM Dealer to arrange for a service date. Your dealer will inspect the oil cooler lines and replace them if necessary. This service will be completed at no charge to you.
The Labour time to inspect your vehicle is about 10 minutes. If it is necessary to replace the oil cooler lines, it could take approximately 1 hour to make the correction. Please ask your dealer if you wish to know how much additional time will be needed to process your vehicle.
This letter identifies your vehicle. Presentation of this letter to your Dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.
Further assistance, if required, may be obtained from the General Motors Zone Office nearest you. Your vehicle Owner's Manual provides the location and phone number of each respective Zone Office.
We are sorry to cause you this inconvenience; however, we have taken the action in the interest of your continued satisfaction with our products.
Your prompt cooperation would be appreciated.
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.
