2008 Hummer H2 Owner's Manual - Page 127

Mirrors {CAUTION: Full-time four-wheel drive vehicles with the transfer case in NEUTRAL will allow the vehicle to roll, even if the shift lever is in PARK (P). So, be sure the transfer case is in a drive gear - not in NEUTRAL. Always set the parking brake. Follow the proper steps to be sure your vehicle will not move. See Shifting Into PARK (P) on page 2-41. If you are pulling a trailer, see Towing a Trailer on page 4-55. Automatic Dimming Rearview Mirror with Compass and Temperature Display Your vehicle may have this mirror. When on, an automatic dimming mirror will dim to the proper level to minimize glare from lights behind you after dark. The mirror also includes a dual display in the upper right corner of the mirror with the compass reading and the outside temperature. Yb: Briefly press this button to turn the display on or off. Your vehicle may also have a Rear Vision Camera. See Rear Vision Camera on page 2-50. 2-45