07 Chevrolet Tahoe no shift indicator

[Sabrina]

07 tahoe missing shift indicator line, starts in 2nd gear so very slow getting up to speed, Only has second and third gear, doesnt recognize park so power door locks dont work, lift gate wont open nor park sensors.  I drove to vet fine. Was parked on slight incline. It popped in reverse. After reversing just fine i put in drive and it barely wanted to go. After hitting 30 mph it was ok bc it has second and third Gear.   Hooked to snap on computer no communication from tcm but i really think it has something to do with popping in reverse on incline but i know its not linkage bc im not stuck in one gear    
 

i might add that stabiltrak Light has been On for a whike and 3 weeks prior to this i was stuck in snow but finally got her out without calling someone come get me   It was a doozy. Something could have got wet.