Ok I was cleaning and taking more detailed picture of my 1986 Iroc-z. When I noticed the head lights are 2 different bulbs. The outside bulb just say Halogen and the inside bulb say Sylvania Halogen. I have owned this car for 28 years and never replaced them. Can you help me identify if they are still the originals.

 

In those days, GM had its own lighting company, Guide. That's the factory original. It says "Guide" on it.

My '88 GTA actually still has both original beams.

 

Guide Headlamp from my 89, notice the Guide name at the top left same as your.