Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1573 (MANUAL TRANSMISSION - ZF S6-650)REPAIR INSTRUCTIONSCONTROL LEVER AND/OR BOOT 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.

Install the control lever insulator, if removed.
Install the control lever boot to the control lever, if removed.

Fig 1: Installing Control Lever Boot & Insulator
Courtesy of GENERAL MOTORS CORP.
Install the control lever.
If alignment of the control lever is necessary, or if the shift lever assembly was replaced perform the following:
1. 4.2. The nut must be seated at the bottom of the thread runout on the shift lever.
2. 4.2. Seat the control lever against the shift lever assembly adjustment nut.
3. 4.3. Back the control lever off the nut in order to align the index mark on the control lever perpendicular to the edge of the control lever boot retainer.
Ensure that the index mark is located on the passenger side and that the shift pattern is aligned parallel to the vehicle centerline or rotated no more than 6 degrees clockwise.

Fig 2: Installing Control Lever
Courtesy 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.