Question:

looking to convert factory GMC Envoy XL air ride load leveling to coil springs. What do I need to do this?

Answer:

To convert your air suspension Envoy XL to Coil spring, you’ll need to use part # 02GEBERT-R, which includes two coil springs designed to fit directly onto your truck along with instructions for disabling the factory air system.  With this kit, you can use your current shocks, or any of the shocks listed on our page for your truck.  You will want to continue using shocks designed for a factory air suspension truck, since your mounting points will not be altered by the conversion kit.

You can see the coil spring conversion kit for a 2003 GMC Envoy XL here:
2003 GMC Envoy coil spring conversion kit.

And all of the parts we carry for that truck here:
2003 GMC Envoy Shocks and Suspension Components