I'm going to disagree with
I'm going to disagree with your comment that it won't sell more trucks. I'm shopping for a new truck to replace the Tacoma I've owned for 17 years, which has been an excellent truck. The SOLE reason I am seriously considering a Chevy (even test drove one) is the diesel, and I'm sure I'm not the only one. If Chevy/GMC didn't have the diesel, I would buy another Tacoma without any hesitation. I think the diesel will pull customers from other brands that don't offer diesels.