Two problems related to transmission gear indicator have been reported for the 2015 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Jeep Grand Cherokee based on all problems reported for the 2015 Grand Cherokee.
On 9/4/15 I was backing a boat into the lake using this vehicle. I put the vehicle into park, or thought I did, and opened the driver door. As I exited the vehicle rolled backwards, knocked me down, and the entire vehicle, with boat and trailer, went into the lake. I have noticed since then that the shifter requires you to hold it in park for a second before the park gear will engage. Slamming the shifter towards park, even with the button depressed and foot on the brake, will not always engage the parking gear. You must wait until the parking gear light on the dash is illuminated. This is not user friendly. I would suggest a sensor being installed on the transmission that automatically shifts into park when the driver door is opened, much like the mercedes gl450.
After coming to complete stop (at a gas pump), put transmission into park, I stepped out of vehicle, within 10 seconds the vehicle began to slowly rolling backwards. My vehicle struck another vehicle causing damage to both vehicles. Now being more aware of this incident, I am very careful to assure both gear indicators- shift knob and display on dash- display "p", and check vehicle physical position for movement. I have noticed there is both a lag to change display and not a positive indication of the park position when changing gear.