SGAL1

I am interested in purchasing a 2001 GMC Yukon 2500 locally from a private seller "original owner". This Yukon is imaculate and it looks to me like he has taken exceptional care of it. It has just under 57,000 miles on it and he says the only accident the truck has been in is when his wife hit a gaurd rail years ago trying to avoid a traffic barrel. This issue has since been repaired, and the damage was only cosmetic.
Anyway I've looked at it (It looks beautiful) and plan to test drive it tomorrow.I have asked him for the VIN number ....
Can anyone here run this VIN number to see if there are any red flags I need to be aware of?
The VIN # is 3GKGC26U01G118725
Thank you very much for your help.
Scott