S15/T15 2WD Jimmy V6-262 4.3L VIN W CPI (1993)
Technical Service Bulletin # 94E06
Date: 940101
Campaign - PCV Valve System Hose Freezes
GMC NUMBER: 94-E-06
GROUP: 6E Engine Emission
DATE: January, 1994
SUBJECT:
PCV VALVE SYSTEM HOSE FREEZE
MODELS:
1992-1994 S/T TRUCKS AND M/L VANS WITH 4.3L ENGINES (RPO L35)
General Motors has determined that CERTAIN 1992-94 S/T trucks and M/L vans equipped with 4.3L engines (L35) used in Alaska or Canada may have
Positive Crankcase Ventilation (PCV) system hose freeze-up if operated below -22° F (-30° C). This condition can cause engine oil leaks through the
dipstick tube and/or rear main seal. Engine failure may result if the vehicle is driven with this condition.
To correct this condition. dealers are to replace the Positive Crankcase Ventilation (PCV) valve with a higher flow calibrated valve.
VEHICLES INVOLVED
Involved are CERTAIN 1992-94 S/T trucks and M/L vans equipped with 4.3L engines (RPO L35) built within the VIN breakpoints as shown.
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number Computer Listings. These listings are furnished to
all involved dealers with the campaign bulletin. Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service System) or
SERVICENET prior to beginning campaign repains.
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. Dealers are to correct all affected vehicles in new and used vehicle stock prior to their sale.
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 ensure the campaign correction has been made before reselling or releasing the vehicle.
Owners of vehicles recently sold from your new vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the
dealer, and arrangements made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to
such owners a copy of the owner letter accompanying this bulletin. Campaign follow-up cards should not be used for this purpose, since the owner may
not as yet have received the notification letter.
If the name and address of the owner of an involved vehicle was unavailable to GMC Truck Division at the time of campaign initiation, the dealer must
determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next
to the applicable VIN so that our records may be updated and the appropriate notification mailed to the owner. This second copy should then be
submitted to the address listed below in the previously supplied yellow campaign envelopes.
GMC Truck Division
General Motors Corporation
101 Union Street
Plymouth. Michigan 48170
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by GMC Truck Division. A listing of owner names and addresses has been furnished to the
