I've had my truck for over 10 years, and I gave some thought to buying a newer one, but have since decided to keep this one. So, I thought I'd have it scanned for codes, and have the O-rings and glow plugs replaced to prevent future trouble. Other than getting it scanned for codes, it's the kind of thing I did myself when I lived in Seattle, but down here I don't have a suitable workspace, nor time, to do it.