2007 Chevrolet Avalanche Owner's Manual - Page 420

Make sure the wheels are straight before proceeding to the next steps. Level Control The self-adjusting rear suspension may come as part of the premium smooth ride suspension package. This type of level control will provide a leveled riding position as well as improved handling under a variety of passenger and loading conditions. A hydraulic pump inside each rear shock absorber raises the rear of the vehicle to the proper height, based on inputs from the road surface, while the vehicle is being driven. It take approximately 2 miles (3.2 km) of driving for the leveling to complete, depending on the road surface conditions. If the loaded vehicle is not moved for approximately 12 hours, the leveling system may bleed down to a lower height. This can be especially apparent if a trailer is left attached to a parked vehicle for long periods of time. The vehicle must be driven to re-level the vehicle. If a weight-distributing hitch is being used, the vehicle should be driven approximately 2 miles (3.2 km) with the trailer prior to adjusting the hitch. {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 on page 138. 6. Shift the transfer case to NEUTRAL (N). See Four-Wheel Drive on page 132 for the proper procedure to select the neutral position for your vehicle. 7. Release the parking brake only after the vehicle being towed is firmly attached to the tow vehicle. If the tow vehicle will not be started or driven for six weeks or more, remove the battery cable from the negative terminal (post) of the battery to prevent your battery from draining while towing. 420