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aerohead · 02-01-2010, 02:21 PM

I think GM inferred that a 1/2-tonneau was good for about a 7% mpg improvement at standard conditions.

02-01-2010, 02:21 PM	#6 (permalink)
aerohead Master EcoModder Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 16,312 Thanks: 24,439 Thanked 7,386 Times in 4,783 Posts	7% I think GM inferred that a 1/2-tonneau was good for about a 7% mpg improvement at standard conditions.