GMC 25517312 Automatic Transmission Shifter Cable Assembly

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To remove the shift cable, start by disconnecting the cable from the negative terminal of the battery. Apply the parking brake and block the wheels to prevent the vehicle from rolling. Raise the vehicle and secure it on jackstands. Under the vehicle, pry the cable end from the transmission control lever stud and remove the cable from the clip on the transmission oil pan. Remove the cable clips securing the cable to the body and the metal U-clip from the shift cable housing. Compress the locking tabs and pull the cable out of the bracket. Push the cable grommet out of the floorpan. Inside the vehicle, remove the driver's side knee bolster and lower steering column cover. Pry the cable end from the shift lever at the steering column and remove the metal U-clip from the cable housing at the bracket on the steering column. Working under the vehicle, remove the shift cable. To install the shift cable, follow the reverse steps of removal and perform the shift cable adjustment before securing the cable. To adjust the shift cable, apply the parking brake and block the wheels. Raise the vehicle and secure it on jackstands. Under the vehicle, pry the cable end from the transmission control lever stud and remove any retaining clips securing the cable. Place the transmission in Neutral and ensure the gear selector on the steering column is also in Neutral. While pulling the cable tight, pry the white colored body-core adjuster locking tab out from its locked position. Ensure the body-core adjuster moves freely by pulling on the cable. Make sure the gear selector and shift lever are still in Neutral and install the cable end onto the transmission manual control lever. Push the white colored locking tab into the body core until it snaps. Route the cable and install the cable retaining clips. Check the adjustment by ensuring all gears can be selected and the engine can only start in Park or Neutral. If necessary, readjust the shift cable or the Park/Neutral switch. Finally, place the gear selector in Park and lower the vehicle. Test drive to check for proper operation.

To install the shift cable, follow the reverse steps of removal and perform the shift cable adjustment before securing the cable. To adjust the shift cable, apply the parking brake and block the wheels. Raise the vehicle and secure it on jackstands. Under the vehicle, pry the cable end from the transmission control lever stud and remove any retaining clips securing the cable. Place the transmission in Neutral and ensure the gear selector on the steering column is also in Neutral. While pulling the cable tight, pry the white colored body-core adjuster locking tab out from its locked position. Ensure the body-core adjuster moves freely by pulling on the cable. Make sure the gear selector and shift lever are still in Neutral and install the cable end onto the transmission manual control lever. Push the white colored locking tab into the body core until it snaps. Route the cable and install the cable retaining clips. Check the adjustment by ensuring all gears can be selected and the engine can only start in Park or Neutral. If necessary, readjust the shift cable or the Park/Neutral switch. Finally, place the gear selector in Park and lower the vehicle. Test drive to check for proper operation.