The Chevrolet Silverado, and its mechanically identical cousin, the GMC Sierra, are a series of full-size and heavy-duty pickup trucks manufactured by General Motors and introduced in 1999.
Hey, Chuck. I’ve seen this problem and performed this repair successfully many times. I’m including a video of the process. It’s not shown in the video, but I always replace the LEDs while I’m in there. They’re typically included in your stepper motor kit. Good luck!