Adjustment & Testing

Place gear selector in Park position and remove key. Remove cup holder/ashtray assembly. Lift lock tab on park lock cable end. See Fig 1 . Depress gear selector shift knob button quickly 3 times to set starting position of cable. Using a sharp pencil, mark starting position on slider. See Fig 1 .

Fig 1: Locating Park Lock Cable Components
Courtesy of GENERAL MOTORS CORP.

NOTE: Adjustment may move when lock tab is pushed. Proper operation must be verified prior to reassembly.
Using a feeler gauge for adjustment, move park lock cable towards shifter base .049" (1.25 mm). Push lock tab of shift lock cable end to set position.
With ignition off and shifter in Park position, attempt to shift lever out of Park. Lever should not move. Turn ignition on. Shift lever should be allowed out of Park. Place shift lever in any position except Park and turn ignition off. Ignition key should not be removable. Attempt to place shift lever in Park. Lever should go into Park position and ignition key should be able to be removed.
If park lock cable fails any test, readjust cable. Check gearshift cable adjustment. See GEARSHIFT CABLE . Install cup holder/ashtray assembly.