Range Selector Lever Cable Adjustment

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Set the park brake and chock the wheels.
NOTE: Adjust the automatic transmission range selector cable while the transmission and the gear selector are in the Park position only. Failure to do so may cause mis-adjustment.
Transmission Heat Shield Replacement » Remove. if equipped.
Verify the transmission range select lever is in the park position.
Verify the transmission manual shift lever is in the park position.
If installing a new cable, skip this step and go to the next step. Pull the retaining collar (1) forward, then release the range select cable adjuster clip (2) by pushing in on the adjuster clip from the backside.

Fig 1: Releasing Range Select Cable Adjuster Clip
Courtesy of GENERAL MOTORS COMPANY
Depress the adjuster clip (2) inboard, locking the adjuster clip completely.
Ensure that the cable adjuster clip (2) is secured with retaining collar covering the adjuster clip.
WARNING: After installing the transmission range selector shift cable, pull up and push down on ALL connections to verify that the connections are fully seated and properly engaged. Failure to perform this task can result in the vehicle not being able to shift into PARK causing potential vehicle damage and bodily injury.
Transmission Heat Shield Replacement » Install. if equipped.
Check the transmission range select lever in all gear selections for proper operation.