2006 Buick Terraza Owner's Manual - Page 148

Rear Window Wiper/Washer {CAUTION: In freezing weather, do not use your washer until the windshield is warmed. Otherwise the washer fluid can form ice on the windshield, blocking your vision. The controls for the rear window washer/wiper are located on the end of the turn signal/multifunction lever. 9 (Off): Move the lever to this position to turn the rear washers/wipers off. Z (Rear Wiper): Move the lever to this position to turn the rear wipers on. = (Rear Washer/Wiper): Move the lever to this position to wash and wipe the rear window. 3-10