Your question is a little confusing. Do you mean Active Handling or do you mean Ride Control? They are two separate things. Active Handling is a function of the ABS/Brake systems and Ride Control is a function of the shock absorbers and the Ride Control Computer.
Location: Springfield, NJ Raceway Park & Atco Raceway
There is also a chance that you won't be able to turn it off at all if the Tire Pressure Sensors (TPMS) aren't functioning or even aren't installed at all in the particular wheels you might be using at the time.
Page 4-11 of my 2006 owner manual says hold down the Active Handling button for 5 seconds to turn off the active handling system. The DIC will display the appropriate message.
There are 4 separate modes:
1. Traction Control - On .... Active Handling - On (Engages when the car is started)
This is the default mode.
This is recommended for normal driving.
2. Traction Control - Off .... Active Handling - On (Engage with 1 push of the button)
Turning off TCS allows the rear wheels to spin, but allows the Active Handling to fully assist in skid control.
This is recommended for drag racing.
3. Traction Control - Off .... Active Handling - Reduced (Engage with 2 pushes of the button)
This is the Competitive Driving Mode which allows the rear wheels to spin, while reducing some of the input that Active Handling has to assist in skid control.
This is recommended for road racing.
4. Traction Control - Off .... Active Handling - Off (Engage by holding button for at least 5 sec.)
This may be used when the driver does not want any on-board sensor input that may effect power reduction or brake application.
No rear wheel spin or vehicle skid corrections are automatically applied.
Note: The Anti-Lock Braking System (ABS) is always on and is unaffected by the various Traction Control or Active Handling selections that may be made above.
You can download an electronic one from the GM website. However, that detailed information that I posted is not really in the owner's manual. I wish I had saved the name of the person who posted it so I could give them credit, but I didn't.