CAMPAIGN:CRANKSHAFT POSITION SENSOR FAILURES
Subject: PRODUCT EMISSION CAMPAIGN 95-C-31 - CRANKSHAFT POSITION SENSOR
Model and Year: 1995 S/T TRUCKS (PICKUP & BLAZER) WITH 4.3L ENGINES
To: All Chevrolet/Geo Dealers
General Motors has determined that the 4.3L engines (RPO L35 - VIN Code "W") in certain 1995 Chevrolet S-10 two or four wheel drive pickup trucks and also in 1995 Chevrolet four wheel drive Blazers equipped with automatic transmissions and with electronic transfer cases (RPO NPl) were shipped with a crankshaft position sensor that may fail due to liquid intrusion. Failure of the sensor may result in engine stalling with a no start or hard start condition.
To correct this condition, dealers are to install a new crankshaft position sensor.
VEHICLES INVOLVED
Involved are certain 1995 S-10 two or four wheel drive pickup trucks and 4- wheel drive Blazers equipped with 4.3L engines (RPO L35 - VIN Code "W") and automatic transmissions with Electronic Transfer Case (RPO NPl) and built within the following VIN breakpoints:
PLANT YEAR MODEL PLANT CODE FROM THROUGH ---------------------------------------------------------------------- 1995 S/T Truck Linden "K" SK100030 SK206440 1995 S/T Truck Moraine "2" S2100001 S2197361 1995 S/T Truck Shreveport "8" S8100001 S8207069
Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.
These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly, you are urged to limit the use of this listing to the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no involved vehicles currently assigned.
PARTS INFORMATION
A preshipment of parts will be sent to involved dealers the week of May 1, 1995. Preshipment parts will be charged to the dealers' open parts account.
Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a "C.I.O." order with no special instruction code, but on an advise code (2) All Goodwrench parts system test dealers should order on a "VIP" order.
Quantity/ Part Number Description Vehicle ------------------------------------------------------------------ 10456292 Sensor Assembly - Crankshaft Position 1
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division by both telephone and then by the customary letter of notification (see copy of owner letter included with this bulletin).
DEALER CAMPAIGN RESPONSIBILITY
All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.
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.
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 owners 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.
In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.
SERVICE PROCEDURE
1. Disconnect Intake Air Temperature (IAT) sensor electrical connector. Loosen throttle body hose clamp and remove retainers from air duct/air cleaner assembly. Move aside air duct/air cleaner assembly as one unit.
2. Disconnect crankshaft position sensor from engine wiring harness. Cut electrical connector off of crankshaft sensor assembly.
3. Raise vehicle.
4. On 4 Wheel Drive vehicles only - Remove front axle under body shield (steering linkage shield).
5. Remove crankshaft position sensor retaining bolt and sensor from engine front cover (Figure 1, Item 1).
6. Cut and discard lower plastic harness retainer (rosebud) at front cover bracket. Remove crankshaft position sensor assembly from vehicle.
7. Carefully route new crankshaft position sensor harness (Figure 1, Item 2) (connector end) up between the water pump and engine block/front cover on right (passenger) side of engine. Retaining clip on harness electrical connector (Figure 1, Item 3) should be facing front of vehicle as it is moved up into position.
NOTICE: DO NOT use excessive force which may damage connector and/or harness. The use of a "'Pick-Up Tool" to hold connector, and a long narrow screwdriver to move and position connector and harness will prove useful.
8. Install crankshaft position sensor in engine front cover. Check to see that sensor is fully seated in front cover prior to torquing down retaining bolt. Torque crankshaft sensor retaining bolt to 7-9 Nm (62-80 lb. in) . USE HAND TOOLS ONLY. DO NOT EXCEED TORQUE SPECIFICATION. Install new plastic harness retainer (rosebud) to engine front cover bracket. Check for sufficient clearance between wiring harness and harmonic balancer.
9. On 4 Wheel Drive vehicles only - Install front axle under body shield, torque bolts to 32 Nm (283 lb. in).
10. Lower vehicle.
11. Complete routing of crankshaft position harness. Harness should be routed under top heater hose and away from EGR valve base.
NOTICE: DO NOT use excessive force which may damage connector and/or harness. Use a long pick-up tool attached to connector retaining clip loop to raise connector and position it properly. Connect crankshaft position sensor harness to engine wiring harness.
12. Reinstall air duct/air cleaner assembly. Tighten hose clamp and install retainers. Connect IAT sensor harness.
13. Start and run engine one minute to verify correct engine operation (no malfunction indicator lamp illumination).
14. Install Campaign Identification Label.
15. Fill fuel tank and wash before returning vehicle to owner (this is to be done only once for vehicles involved in 95-C-31, 95-C-33, 95-C-34 and 95-C-35).
CAMPAIGN IDENTIFICATION LABEL
Each vehicle corrected in accordance with the instructions outlined in this Product Campaign Bulletin 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 Campaign Claim with the information indicated below:
* FAILED PARTS LABOR LABOR OTHER NET REPAIR PERFORMED PC PART NO. ALLOW CC-FC OP HOURS HOURS AMT -------------------------------------------------------------------------- Replace Sensor (2WD) 1 10456292 ** SK-00 V9590 0.4 0.1
Replace Sensor (4WD) 1 10456292 ** SK-00 V9591 0.5 0.1
Fuel Top-Off - - - -- SK-00 T2460 - - - - +
Wash Vehicle - - - -- SK-00 T2461 - - - - ++
* Campaign Administrative Allowance.
** The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 40% of all parts required for the repair.
+ The amount identified in the "Net Amount" Column should represent the cost of the fuel required to fill the vehicle's tank for a customer. Note that the amount submitted should represent the self-service price of regular unleaded fuel.
++ The amount identified in the "Net Amount" Column should represent the cost for a customer car wash up to $6.00.
Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim Submission.
Dear Chevrolet Owner:
This notice is sent to inform you that Chevrolet Motor Division is conducting an emission recall campaign that includes your vehicle.
REASON FOR THIS RECALL
General Motors has determined that certain 1995 Chevrolet S/T trucks equipped with 4.3L engines may experience a condition in which the crankshaft position sensor improperly functions. This condition could lead to engine stalling with restarting difficult or impossible.
WHAT WE WILL DO
To correct this condition, dealers are to install a new crankshaft position sensor. This service will be performed for you at no charge.
WHAT YOU SHOULD DO
Please contact your Chevrolet dealer as soon as possible to arrange a service date and to assure parts availability. Instructions for making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be needed to schedule, process and repair your vehicle.
The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid reply card and returning it to us. Should your dealer not schedule a service date within a reasonable time, you should contact the Chevrolet Customer Assistance Center by calling 1-800-222-1020.
If your dealer and the Customer Assistance Center are unable to remedy this condition within a reasonable time, you may wish to advise the Environmental Protection Agency at the following address: Director, Manufacturers Operations Division (6405J) , United States Environmental Protection Agency, 401 M Street. S.W., Washington, D.C. 20460.
To ensure your full protection under the emission warranty made applicable to your vehicle by State or Federal Law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be lack of proper maintenance of your vehicle. Also, your vehicle may fail a state or local emission inspection if this recall is not accomplished.
IMPORTANT MESSAGE FOR CALIFORNIA RESIDENTS
The California Air Resources Board (CARB) requires vehicle emission recall campaigns be completed prior to California registration renewal. Uncorrected emission recall campaigns will result in your not being able to renew your California vehicle registration.
At the time of emission campaign completion, your California dealer will issue a "Campaign Certificate Of Completion". Keep this certificate and, if required, present it to the Department of Motor Vehicles when renewing your California registration as proof of campaign completion.
We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.
Chevrolet Motor Division GENERAL MOTORS CORPORATION
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.
