2013 Cadillac SRX

Speedometer malfunction , won’t return to zero only goes down to 50 Kim’s ,speedometer totally off —- when doing 60 Kim’s speedometer shows 120 kms

What year? How many miles?

My wild guess is that the dial face is askew. It might be possible to remove the gage cluster and reset the dial face, I’ve done this before, but I’m not familiar with that particular car so I can’t say for sure. Perhaps you can con the dealer’s parts window guy out of an “exploded view” drawing of the area.