1994 GMC Suburban Owner's Manual - Page 90

When your headlights or parking lights are on,rotate the dial to the right of your headlight switch up to brighten, or down to dim, your transfer case indicator light. 2H (2-Wheel High): This setting is for drivingin most street and highway situations. Your front axle is not engaged in two-wheel drive. 4H (4-Wheel High): This setting engages your front axle to help drive your vehicle. Use 4H when you need extra traction, such as on wet or icy roads, or i n most off-road situations. N (Neutral): Shift to this setting only when your vehicle needs to be towed or when using a power take-off. 4L (4-Wheel Low): This settingalso engages your front axle to give you extra power, but should be used only for off-road driving. You can shift from 2H to 4H or from 4H to 2H while the vehicle is moving. Your front axlewill engage faster if you take your foot off of the accelerator for a few seconds after you shift. In extremely cold weather it may be necessary to stop orslow the vehicle to shift out of 2H. To shift into orout of 4L or N (Neutral): Slow the vehicle to a roll, about 1-3 mph (2-5 km/h) and shift your transmission into neutral. 0 Shift the transfer case shift lever in one continuous motion. Don't pause in N (Neutral) as you shift the transfer case into4L, or your gears could clash. Remember that driving in 4H or 4L may reduce fuel economy. Also, driving in four-wheel drive on dry pavement could cause your tires to wear faster and make your transfer case harder to shift. Front Axle Locking Feature The front axlelocks and unlocks automatically when you shift the transfer case. Some delay for the axle to lock or unlock is normal. If the outside temperature is very hot, or the vehicle has been used under hard driving conditions, theremay be a slight delay for the axle to unlock. 2-34