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 205 (AUTOMATIC TRANSAXLE SERVICING)ADJUSTMENTSSHIFT CABLE

2003 Chevrolet TrailBlazer 4.2 S, 4WD

Shift Cable

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Shift Cable

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Adjust the shift cable while the transaxle manual control lever and the shift control lever are in the Neutral position only. Failure to do so may cause misadjustment.

Set the parking brake. Block the wheels. Disconnect the shift cables at both ends with the system in Neutral.

NOTE: Do not attempt to separate the metal couplings. Replace both cable pieces if the metal couplings are separated. Both of the cable sections will be damaged if the 2 metal couplings are disconnected.

Push the adjuster up to the adjustment position until the cable housings separate. This releases the adjuster. See Fig 1 . Depress the adjuster clip once.
This mobilizes the adjuster housing toward the transaxle end fitting. Line up the end fittings so they slide together until you feel the parts cam together and lock.
Depress the adjuster clip completely. This locks the cable into its adjusted service position. Pull the conduit in the opposite direction to assure full system adjustment of the shift cable.
The horseshoe clip with the tab is flush when fully engaged. See Fig 2 .
Fully engage the conduit. The horseshoe clip with the tab is not flush when not fully engaged. Install the shift cable retainer and the wiring harness clip or wiring harness strap.

Fig 1: Identifying Shift Cable Adjuster (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

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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.