Buick LaCrosse: Reducing Speed While Using 
Cruise Control - Cruise Control - Driving and Operating - Buick LaCrosse Owners ManualBuick LaCrosse: Reducing Speed While Using Cruise Control

If the cruise control system is already activated:

• Move the thumbwheel toward SET/− and hold until the desired lower speed is reached, then release it.

• To slow down in small amounts, move the thumbwheel toward SET/− briefly and then release it.

Each time this is done, the vehicle goes about 1.6 km/h (1 mph) slower.

    Increasing Speed While Using Cruise Control
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    Use the accelerator pedal to increase the vehicle's speed. When you take your foot off the pedal, the vehicle will slow down to the previous set cruise control speed. ...

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