Check shipping costs. Try asking a GM dealer what they will charge for a new pad shipped. My guess is a lot more than $115. I paid $60 in shipping for the hood pad I bought for my TTA from CARMotorsports. The GN pads go for $140+ shipped on E-bay. At least I have seen more than a few go for that.
I was trying to be helpful. I did just purchase a GN insulator from my local dealer last week @ $95.04 plus NY state tax. I purchased one from GM last year for $86. Again, I'm just trying to get you some bites. Count this as a bump. Brian