I am debating on the issue of purchasing after market warranty. Trying to balance the cost ( > $2,000) now versus potential repair costs in future. I know injector work is expensive but I would not go thru GM anyway once out of warranty. Excluding other possible problems which could occur, I guess it comes down to how much non-dealer injector replacement might cost and liklihood of cost exceeding $2000 before 100,000 miles. Seems like I've read a fairly wide variation in non GM injector replacement costs. Any thoughts re: whether to save the 2 grand now. BTW, truck has 25K miles and has not seen the service dept yet.