HUD

[RC Mike]

Hey Guys, My HUD just started to act up, I can't adjust up and down. It is stuck in the down position but the mode and everything else works! Any ideas?

 

[Rruuff Day]

Hey Guys, My HUD just started to act up, I can't adjust up and down. It is stuck in the down position but the mode and everything else works! Any ideas?

My ideas only on this.
1) Possibly a calibration issue. Dealer should be able to re-calibrate
2) Possibly one of the mirrors in the HUD recess in the dash may have jarred loose. Maybe due to hitting a sharp bump.

Hopefully to save some money, you're still under warranty. i see this is in the C6 forum but your profile says you have a C7.

 

[RC Mike]

It is on my C6 not the C7

 

[Rruuff Day]

Then disregard the reference to warranty.

 

[RC Mike]

Looks like it’s the motor that controls it and GM does not make it any more

 

[Rruuff Day]

Check if there is a separate fuse for the HUD motor. If not a fuse and the motor is shot, and you still have display, and can't find a replacement motor, I'd be accessing the mirror and shimming it up to a fixed position that you can see the display.

 

[Area Z51]

The issue is that the pivot point for the HUD mirror has failed. It's more common in a hot climate, but can also fail due to plastic fatique.
Here is a video on the repair.