[ATRH2]

"Is it what GM calls the DSC (Driver Shift Control) mode that they have in the 2007 Escalades, other caddies, vettes and some of the pontiacs? If so, here exactly are the "tap-up/tap-down" controls that a lot of the GM docs on this feature describe?"
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Transmission: six-speed automatic with Driver Shift Control (DSC), electronically controlled Driver Shift Control allows the driver to manually shift gears for either sporty driving, or while trailering or driving in the mountains.

Here is the "M" on the Escalade........