05 Denali Put in D for drive but felt like Neutral

[latvius]

If that linkage was mesded up, that definitely would've been best case scenario. I messed up the linkage once in my old Express van--I ran over a huge cone--and it had a similar issue that you had. Did you look really good at the plastic ends on it?

Yup looked in perfect condition

 

[S33k3r]

Could be your needle isn't correctly aligned up at the console. The cable may be good, but it might need to be adjusted.

 

[latvius]

Could be your needle isn't correctly aligned up at the console. The cable may be good, but it might need to be adjusted.

If it was my 84 K30 sure but this is digital, somehow the gear selector tells the gauge cluster electronically what gear it's in.