GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Blazer - 2WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Vehicle Speed Sensor

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 102878 Size: SH
  2. Remove the electrical connector from the vehicle speed sensor.

    3. Object Number: 4779 Size: SH
  3. Remove the following parts:
    4. • The bolt
    • The vehicle speed sensor
    • The O-ring seal

Installation Procedure
  1. Coat a new O-ring seal with a thin film of transmission oil. Use Synchro-mesh Transmission Fluid GM P/N 12345349 or the equivalent.

    2. Object Number: 4779 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the following parts:
    3. 2.1. The O-ring on the vehicle speed sensor assembly
    2.2. The vehicle speed sensor assembly
    2.3. The bolt

    Tighten
    Tighten the bolt to 22 N·m (16 lb ft).


    Object Number: 102878 Size: SH
  3. Install the electrical connector to the vehicle speed sensor.
  4. Lower the vehicle.