If you pull up on the top rear part of the console it gives you access to the adjustment. Pretty self explanatory once you see it. You'll need a deep socket and rachet. Sorry, it's been a while since I did mine so I can't tell you the size. I think 10mm but not sure. I've adjusted mine several times and have to say that Chevy dropped the ball on this setup. Mine still won't hold on much of a hill even in gear.
The 2008 Chevrolet Corvette has a V8 engine.
The 2008 Chevrolet Colorado has 16 valves.
The 2008 Chevrolet Malibu has 16 valves.
The 2008 Chevrolet Tahoe has 16 valves.
The 2008 Chevrolet Equinox has 12 valves.
The 2008 Chevrolet Suburban has a V8 engine.
The 2008 Chevrolet Suburban has 16 valves.
The 2008 Chevrolet Express has a V8 engine.
The 2008 Chevrolet Equinox has a V6 engine.
The 2008 Chevrolet Corvette has 16 valves.
The 2008 Chevrolet Tahoe has a V8 engine.
The 2008 Chevrolet Impala has 12 valves.