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GMC 8673634 Switch Assembly, Torque Converter Clutch Temperature

1983-1993 GMC

Customer Questions & Expert Answers (3)
8673634 GM Switch Assembly, Torque Converter Clutch Temperature Illustration 1 of 1
  • Part Description
    SWITCH, Transmission Safety Starting Switch Or Speed Sensing
  • Manufacturer
    General Motors
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A
  • Product Specifications

    BrandGenuine GMC
    Manufacturer Part Number8673634
    Part DescriptionSWITCH, Transmission Safety Starting Switch Or Speed Sensing
    Item Dimensions2.1 x 2.1 x 0.8 inches
    Item Weight0.30 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerGeneral Motors
    SKU8673634
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1988-1992, 1985-1986 GMC C15006 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L DieselC1500 EXTENDED CAB LONG BOX, C1500 EXTENDED CAB STANDARD BOX, C1500 REGULAR CAB LONG BOX, C1500 REGULAR CAB STANDARD BOX, REGULAR CAB LONG BOX, REGULAR CAB STANDARD BOX
    1988-1992, 1985-1986 GMC C25006 Cyl 4.3L, 6 Cyl 4.8L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel, 8 Cyl 7.4LC2500 EXTENDED CAB LONG BOX, C2500 EXTENDED CAB STANDARD BOX, C2500 REGULAR CAB, CREW CAB, REGULAR CAB
    1988-1991, 1985-1986 GMC C35006 Cyl 4.8L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 7.4LC3500 CAB CHASSIS 135.5, C3500 CAB CHASSIS 159.9, C3500 CAB CHASSIS 183.5, C3500 EXTENDED CAB, C3500 REGULAR CAB, CAB CHASSIS 135.5, CAB CHASSIS 159.9, CREW CAB, REGULAR CAB
    1985-1992 GMC G15006 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L1/2 TON CARGO, 1/2 TON PASSENGER
    1985-1992 GMC G25006 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel1/2 TON CARGO, 1/2 TON PASSENGER, 3/4 TON CARGO, 3/4 TON PASSENGER
    1985-1992 GMC G35006 Cyl 4.3L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 7.4L1 TON CARGO, 1 TON COMMERCIAL/RECREATIONAL VEHICLE, 1 TON PASSENGER
    1985-1993 GMC Jimmy6 Cyl 2.8L, 6 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel1/2 TON, 2 DOOR, 4 DOOR
    1988-1992, 1985-1986 GMC K15006 Cyl 4.3L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L DieselK1500 EXTENDED CAB LONG BOX, K1500 EXTENDED CAB STANDARD BOX, K1500 REGULAR CAB LONG BOX, K1500 REGULAR CAB STANDARD BOX, REGULAR CAB LONG BOX, REGULAR CAB STANDARD BOX
    1988-1992, 1985-1986 GMC K25006 Cyl 4.3L, 6 Cyl 4.8L, 8 Cyl 5.0L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 6.5L Diesel, 8 Cyl 7.4LK2500 EXTENDED CAB LONG BOX, K2500 EXTENDED CAB STANDARD BOX, K2500 REGULAR CAB, REGULAR CAB
    1988-1991, 1985-1986 GMC K35006 Cyl 4.8L, 8 Cyl 5.7L, 8 Cyl 6.2L Diesel, 8 Cyl 7.4LCAB CHASSIS 135.5, CAB CHASSIS 159.9, CREW CAB, K3500 CAB CHASSIS 135.5, K3500 CAB CHASSIS 159.9, K3500 EXTENDED CAB, K3500 REGULAR CAB, REGULAR CAB
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  • Customer Questions & Expert Answers

    Q:
    Do these parts fit my vehicle?
    A:
    You can Select Your Vehicle to check if 8673634 fits your vehicle.
    Posted and answered by GM Parts Specialist Raul
    Q:
    What should you do before installing the Neutral Safety Switch of the 1988 GMC Safari? Posted by Cameko P.
    A:
    Before installing the switch, align the tang on the switch with the hole in the shift tube. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Bob / Apr 01, 2026
    Q:
    What tool is used as a gauge pin for the Neutral Safety Switch, and what is its size for the 1992 Pontiac Firebird? Posted by Verified Customer
    A:
    A 3/32-inch drill bit is used as a gauge pin. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by GM Parts Specialist Raul / Apr 21, 2023

Genuine GM Part 8673634, the Right Choice

To ensure reliability, purchase GM part # 8673634 Switch Assembly, Torque Converter Clutch Temperature. It is sometimes referred to as GMC Neutral Safety Switch. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific GMC C2500, Suburban, Yukon models.

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