Belltechcorp.com 88-98 Chevy / GMC Full Size Pickup (AI) 4" 5950 (each)

You can buy those through almost any company. Summit has great prices on BT parts.

4" lowering spring. If you only want 2" you'll have to put your original rear hanger back on so you will have a total of 6" drop in the rear. You will need the c'notch when lowering 6". You might need some pinion shims for your axle to get it aligned properly.