lol. I did that once not realizing right away I had the selector in 3. I could hear the engine revving higher than it should at 70 mph, horrible for fuel economy I'm sure.
2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come. 2002 Grand Prix GT N/A 127k - Same as 06 Plus: Trans Cooler, DIY Aux Input, LED lighting, Suspension Upgrades, Tint, Retrofits. Sold.