Chevrolet Astro Coolant Flush

Hello, How Do I Check The Problem Codes For The Engine Performance? I Know That There Is A Pin Connector Under The Dash On The Driver Side...

I Am Just Trying To Flush My G/f's Vans' Radiator. I Am Curious On The Best Way To Do This. I Am Having Trouble Locating A Drain, So If...

I Have Flushed The Radiator And Engine And Want To Know If There Are Any Special Instructions I Need To Know.as An Example: Is There A...