you are not alone , these have a near 100% failure rate. These dashboards have absolutely no UV repellent at all.
A buddy of mine has a 99 1500 that he bought new , he has so much crap piled on the dash that sunlight never hits it , still looks new to this day ( go figure ).

When you install your replacement dash , get one of those fuzzy carpet looking things to cover it, it helps. Paul