1998 GMC Suburban Owner's Manual - Page 98

An indicator near the lever shows you the transfer case settings: 2-Wheel High (2H): This setting is for driving in most street and highway situations. Your front axle is not engaged in two-wheel drive. 4-Wheel High (4H): This setting engages your front axle to help drive your vehicle. Use 4H when you need extra traction and i n most off-road situations. The front axle portion of the indicator diagram will light up when you shift into four-wheel drive and the front axle engages. Some delay between shifting into four-wheel drive and the indicator's lighting is normal. If the front axle light does not go out ilnlnediately after you shift out of four-wheel drive, have your dealer check your system. Shifting the transfer case to NEUTRAL (N)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 t.ransfercase in NEUTRAL (N). "Parking Brake" in See the Index. Neutral (N): Shift to this setting only when your vehicle needs to be towed. 2-20