So if your going to convert your hid to led you’ll have to do some modifications. I’ve taken out my headlight took apart my ballast and Chevy made it complicated to convert. So I’m looking into finding a custom harness to go from the main headlight adapter to try and configure it so that I can change out to leds. Most cars with hid you can disconnect and use the oem plug that supplies power to headlight and ballast. And plug your led straight into that oem power supply. But with the blazer that’s not the case. Anyways you’re going to have to remove the front side panels to get to the headlight.