We bought the 96 mo. / 80,000 mi. GMPP contract ($100 deductible) from James Black Cadillac when our 5BW had 7,846 miles on it. We paid $2,783.00. It's the third GMPP contract we've purchased from James Black Cadillac over the years.
The one we purchased on our Yukon Delani has already paid for itself when we had to replace both front MagRide shocks. Still don't understand how they both crapped out at exactly the same time, but it was after 36,000 miles so I believe it was the GMPP that paid for them. GM is really proud of those shocks.