When I get in my 2009 ss in cold weather, (below 10 degrees or so), if the engine is ether running or not running it won't shift into reverse or fifth, every other gear is just fine. It actually seems the shiftier won't go all the way to the right, but I am not shure. Been this way for last 3 winters. When real cold out,below zero, and after driving fast on hwy it won't want to go in 5th until I slow down again and drive awhile.

This is not normal it won't go in at all. The colder outside the worse. If I let it sit running in neutral running for ten minutes all is fine again. Solution at present is to shift it to reverse after parking or back into parking spot.

130 miles no fluid change because GM claims it is lifetime?

Any ideas this is annoying?
Anyone Else have this problem?

 

Change trans fluid, of this still happens, you just have to wait. it's a normal thing though in winter. Try going from 1st to reverse.

 

Sounds like mis-adjusted or frozen shifter cables, try to get the one for lateral movement centered better, so you aren't fighting it so far to the right. May help.

Although, reverse is further over to the right than 5th gear, so if you're losing both of them it may be internal to the trans and nothing you can do about it.

 

You need new shift cables.

https://www.cobaltss.net/forums/driv...everse-320354/