My speedometer is way out of calibration, at 50 mph, it reads 80 mph. on 1998 Chevrolet 1500 Pickup

Anybody else having this issue? I knew it was out,started using GPS, noticed it getting worse.

Asked by for the 1998 Chevrolet 1500 Pickup
very common i chev veh your cluster is going bad. cost to repl approx 400.00 speedo repair in your area to get est
Thanks ! My research is coming up the same. I think I'll save my $$$ for gas, and rely on my G.P.S.for my speed :)
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common issue