Automatic Transmission Range Selector Cable Adjustment

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Ensure the steering column shift lever and the transmission manual shaft lever are in the park (P) position.
Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
With right hand, push the flange (3) of the cable (transmission end) (5), inside the cable (1) (shifter end) until the connection is made, ensuring the flange ribs (7) align with the cable (shifter end) (1) slots (2).
Hold the red security ring (6) with left hand and with right hand, twist the blue rotating lock (4) until it snaps into position.

Fig 1: Automatic Transmission Range Selector Cable
Courtesy of GENERAL MOTORS CORP.
With left hand, push the red security ring (1) to the right.
The red security ring should cover the white (2) marks on the blue rotating lock (3).

Fig 2: Automatic Transmission Range Selector Cable & Red Security Ring
Courtesy of GENERAL MOTORS CORP.