I don't know, but it sounds very unusual for Chevy to use a lens and not put a light bulb behind it. Is there room for a pig tail and bulb? Keeping in mind that incandescent bulbs are heaters not a light source; and it will either melt, or set ablaze any plastic that is too close to the element.
If it looks to be a decorative lens instead of functional one a few LED bulbs could fix that. LEDs can be mounted in the plastic as all energy goes into making light not heat.