2000 GMC Sierra ext cab 1500 5.3L. 209k miles.  Runs good. 4x4 is hit or miss, sometimes it works, sometimes it doesn't. I think it needs a new push button switch, they are natorious for going out on this model/year. Cab is rusted like most GM trucks of this year. I put a new rear end in it 2 years ago. It had a new rebuilt transmission and transfer case put it before I bought it 5 years ago. Reliable enough I drove it to Wichita and Hutchinson recently. asking