If the dash gear indicator is out, it usually is caused by the Mode Selector blowing on the tranny - hard shifting usually accompanies this as well. Dealer trip time - part out of warranty is about $200 plus labor to install. Myself and at least one other have had the wiring harness inside the driver’s side fender rub and short out to cause this - they put over 8 Mode Selectors in mine before finding the problem.