GM: 5 year/100,000-mile used car (powertrain) warranties

http://www.detnews.com/apps/pbcs.dll/artic.../702030382/1148

That's a HUGE jump from what they were offering before on most of their certified used vehicles per http://www.edmunds.com/advice/cpo/articles...0/page007.html:
"Certified used Chevrolet vehicles are covered under the GM Certified program. GM Certified used vehicles must be less than five years old, and have less than 60,000 miles. Each vehicle includes:

3 day/150 Satisfaction guarantee
110+ Point Inspection
24-Hr Roadside Assistance
Comprehensive Limited Warranty for 3 Months/3,000 miles "

It's unclear if the 5 years/100K miles starts from the day it was originally sold as new (it's that way for some manufacturers) or if it starts from the day and mileage of the used car purchase itself.

For comparison of other certified used vehicle warranties, see http://www.edmunds.com/advice/cpo/articles...00/article.html.

Let's wait for malorn and Jonnycat26 to chime in.