2003 Hummer H2 Owner's Manual - Page 111
2003 Hummer H2 Manual
Page 111 highlights
(4LO Lock): This setting sends maximum power to all four wheels. You might choose this if you are driving off-road in deep sand, deep mud, and climbing or descending steep hills. When in this mode, you can also choose to lock the rear axle for additional traction. See "Locking Rear Axle" later in this section. NEUTRAL: Shift the transfer case to NEUTRAL only when towing your vehicle. See "Towing" in the Index for more information. Indicator lights in the buttons will show you which position the transfer case is in. The indicator lights will come on briefly when you turn on the ignition and one will stay on. If the lights do not come on, you should take your vehicle to your dealer for service. An indicator light will flash while shifting the transfer case. It will remain illuminated when the shift is complete. If for some reason the transfer case cannot make a requested shift, it will return to the last chosen setting. If the SERVICE 4WD message in the DIC stays on, you should take your vehicle to your dealer for service. See "Service 4WD" or "Driver Information Center" in the Index for further information. CAUTION: Shifting the transfer case to NEUTRAL can cause your vehicle to roll even if the transmission is in PARK (P). You or someone else could be seriously injured. Be sure to set the parking brake before placing the transfer case in NEUTRAL. See "Parking Brake" in the Index. 2-29
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