EXPERTEC TSB (92-7A-127)

Publication date: 1992-08-03
Reference number: 92-7A-127

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 92-7A-127, Date of Issue: 08/03/92

NEW WIRING HARNESS ASSY. - IN-HARNESS TEMP. SENSOR PKG.

Model(s): 1991-92 GMC C/K, R/V, P Trucks & G Vans

Bulletin No.: GMC 92-7A-127

Date: 08/03/1992

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic

Fig 2: Graphic

Fig 3: Graphic

SUBJECT

INFORMATION ON NEW WIRING HARNESS ASSEMBLY WITH IN-HARNESS TEMPERATURE SENSOR

MODELS

1991-92 C/K, R/V, P TRUCKS AND G VANS WITH 4L80-E/4L80-EHD TRANSMISSION

SERVICE INFORMATION

(Fig 2 and Fig 3 ) New Wiring Harness Assembly with an in-line temperature sensor. Replaces current design Temperature Sensor.

START OF PRODUCTION DATE: (Fig 1 )

Starting March 31, 1992 (Julian Date 090) all 1992 HYDRA-MATIC 4L80-E/ 4L80-EHD Transmissions were built with a new Wiring Harness Assembly which has an in-line temperature sensor.

SERVICE PROCEDURE

Transmissions built prior to this date can be serviced with the previous design Sensor. To service the new wiring harness, leave the current sensor in the previous valve body unconnected. There is no connector for the sensor. To service the previous valve body assembly use the new wiring harness assembly and the valve body assembly together, available in a service package. New valve body assembly cannot be serviced with previous wiring harness.

CAUTION: Use care when removing the wiring harness connectors. Broken connectors require a new harness assembly.

SERVICE PARTS INFORMATION

SERVICE PARTS

Part Number	Name	Models
8686985	Pkg.-Electrical Wiring Harness Assembly	ALL
8686976	Pkg.-Valve Body Assembly	91-BAP, BBP, BJP, BMP, BNP, CAP, CBP, CKP, CRP 92-BAP, BJP, BMP, BNP BSP, BUP, BYP, BZP, JDP, LAP, LFP, LLP, MAP, MBP, MJP, MKP, MLP, MPP
8686978	Pkg.-Valve Body Assembly	91-ABP, ACP, ADP 92-ABP, ACP, AFP, AJP, AHP
8686979	Pkg.-Valve Body Assembly	91-DNP, DPP 92-DNP, DPP
8686980	Pkg.-Valve Body Assembly	91-DCP, DDP, DLP, DRP 92-DCP, DLP, DRP, MHP, TSP, TWP
86869811	Pkg.-Valve Body Assembly	91-DSP 92-HTP

PARTS INFORMATION

Parts are available. In case of limited inventory, parts will be placed on 400 control to waive V.I.P. surcharges. Only verifiable emergency V.I.P. orders will be accepted. GMSPO will make every effort to obtain parts.

However, the part will be shipped premium transportation at dealer's expense and all other types will be placed on backorder until the 400 control is removed.