Height Sensing Proportioning Valve: Notes
NOTE:
If front wheel lock-up is experienced during braking when vehicle is near maximum GVWR, adjust height-sensing proportioning valve.
WARNING:
The use of aftermarket equipment (such as load leveling kits, air shocks, etc.), or making modifications that change the distance between axle and frame, will provide a false reading to brake proportioning valve. These modifications may result in unsatisfactory brake performance, which in turn could result in an accident and possible personal injury.