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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1735 (FRAME AND UNDERBODY)REPAIR INSTRUCTIONSTRANSMISSION SUPPORT REPLACEMENTINSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the transmission support to the frame. (15 series)
    Fig 1: Installing Transmission Support To Frame (15 Series)
    G03382352Courtesy of GENERAL MOTORS CORP.
  2. Install the transmission support to the frame. (25/35 series)
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  3. Install the bolts and the nuts in order to retain the transmission support to the frame.

    Tighten 

    Tighten the nuts to 95 N.m (70 lb ft).

    Fig 2: Installing Transmission Mount
    G03382353Courtesy of GENERAL MOTORS CORP.
  4. Lower the rear of the transmission.
  5. Install the transmission mount to the transmission support.
  6. Install the nuts in order to retain the transmission mount to the transmission support.

    Tighten 

    Tighten the nuts to 40 N.m (30 lb ft).

  7. Remove the transmission jack.
  8. Lower the vehicle.
    Fig 3: Installing Nuts In Order To Retain Transmission Mount To Transmission Support
    G03382354Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.