Speedometer in 2003 Trailblazer

Speedometer in 2003 Trailblazer is showing wrong speed intermittently. Seems to be a known problem to GM. Is this something I can fix myself?

Have you contacted a Dealer? It could be a mandated repair. Ie they do it even out of warranty.

No I have not. I’ve never had good experiences at GM dealerships.

Just called GM hot line and was told that this model and year are not covered under any recalls.