DonaldFrank2 said:
@Ozzy
Sorry, I misread your comment and another one. I thought you said it wouldn’t be in the cluster.
Internet redemption story, folks. We all saw it.
If I’m wrong or make a mistake, I’ll own it. I’m quick to judge, but I hate when people post bad advice. I’ll always admit when I’m wrong.
@DonaldFrank2
This comment is empty, admin should fix.
SarahBrown said:
My guess is that the stepper motor behind the needle failed.
Are there any fuses or relays I could have burnt?
Could’ve or could have, not could of 
The early GM gauge clusters have terrible stepper motors. It’s very possible that’s the issue. You might have just gotten lucky, but you can try to key off and on a bunch of times and hope it resets. Percussive maintenance while cycling could work, but more likely, you’ll need a cluster removal and repair. There are companies that replace these with modern motors.
@Sam
I have an old Camaro that gets stuck like this. I drilled a tiny hole in the cluster and used a safety pin to knock the needle back down when it gets stuck. Been working that way for 20 years, lol.
@Sam
If I remove it, is there anything I can do to get it working again?