Can someone help with an auto transmission issue with it not shifting?????

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. So sorry to hear you're having trouble with your vehicle. It sounds like your K1500’s transmission is giving you some real trouble. Even though it seems to shift into all gears while idling, it's possible that it is just illuminating the indicator light and not actually engaging that gear. It's likely that you're having an internal transmission or valve body problem given the symptoms. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!