No Park

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
Front Differential Carrier (238)	Inspect for damaged or broken Front Differential Assembly (238). Inspect for damaged or broken Front Differential Side Gear or Pinion Gear. Inspect for damaged or broken Front Differential Pinion Gear Shaft. Inspect for damaged or broken Front Differential Pinion Gear Shaft Pin. Inspect for worn, stripped or sheared Front Differential Side Gear splines. Inspect for damaged or broken Final Drive Sun, Pinion or Ring Gear. Inspect for worn, stripped or sheared Final Drive Sun Gear splines.
Output Carrier Assembly (555)	Inspect for broken Output Carrier Transfer Drive Gear Hub (231). Inspect for worn, stripped or sheared Output Carrier Transfer Drive Gear Hub (231) splines. Inspect for damaged or broken park Gear (232). Inspect for disengaged or broken Drive Sprocket Retainer Ring (235).
Drive Link (233)	Inspect for broken, worn or damaged Drive Link Assembly (233). Inspect for broken, worn or damaged Drive Sprocket (234). Inspect for broken, worn or damaged Driven Sprocket Assembly (241). Inspect for worn, stripped or sheared Driven Sprocket splines. Inspect for broken Output Carrier Transfer Drive Gear Hub Assembly (231).
Automatic Transmission Case (19)	Inspect for broken or damaged Case. Inspect for broken or bent Park Pawl Shaft (714). Inspect for broken or missing Park Pawl Actuator Guide Pin (704). Inspect for broken or missing Manual Shift Detent Lever Pin (710). Inspect for damaged or broken Manual Shift Detent Lever Shaft (705). Inspect for loose, damaged or broken Manual Shift Detent Lever Spring (20). Inspect for broken, loose or misaligned Park Pawl Actuator Guide (707). Inspect for binding, bent or broken Park Pawl (715).