Do not install mounting rails over plastic bed liners. Plastic bed liners must be cut out of the way. Base rails may be installed on spray in liner. Note: Consult installer for recommended curing time.

GCW - GVW = Max. GTW

Example:

• 2001 GMC Heavy Duty 2500
• 4 Wheel Drive Extended Cab
• Engine: Duramax 6600
• HorsePower: 300 hp @ 3100 rpm
• Torque: 520 lb. ft @ 1800 rpm
• Transmission: Allison 5 speed automatic
• Axle Ratio 3.73 to 1
• GVW 9,200 lbs
• GCWR: 22,000 lbs
• 22,000 lbs. GCW - 9200 lbs GVW = 12,800 lbs GTW

GCW = Gross Combined Weight Actual weight of tow vehicle and trailer combined
GVW = Actual weight of the vehicle when fully loaded. It is the base curb weight plus the cargo weight.
GTW = The weight of the trailer fully loaded.

• Plastic lube plates can be used to avoid messy grease. The plastic lube plate must not exceed 3/16 of an inch in thickness to ensure hitch will operate properly. Lube plates must be 10 inches in diameter or larger to properly distribute king pin weight.
• Before each trip or maneuver, operate the handle and check that the jaws open and close freely.
• See that all hitch pull pins are in place and the spring retaining pins are installed.
• Recheck tightness of all hardware every 1000 miles of use.
• Lubrication to the hitch is essential to provide for a good long service life. Any pivoting point inside the head should be lubricated with a white lithium spray lube. The pivoting points outside the head need to be lubricated with a high pressure lube, such as 80/90 gear lube or grease. Reese offers the high pressure lube. This will allow for easier operation of the hitch. The skid plate can use either grease or a minimum of a 10" lube plate. When lubricating you should always remove the old lubricant to remove any road grim that has collected to prevent excessive wearing of components. All hardware should be inspected and torqued periodically per the recommended torque specification in the instruction manual.

Anytime you are above the Weight Carrying (WC) rating of your Class III/IV Receiver or you want to improve the ride quality and "towability" of your tow vehicle and trailer combination.

• Plastic lube plates can be used to avoid messy grease. The plastic lube plate must not exceed 3/16 of an inch in thickness to ensure hitch will operate properly. Lube plates must be 10 inches in diameter or larger to properly distribute king pin weight.
• Lube plate, provides a greaseless lubricant between the skid plates of the fifth wheel hitch and the pin box. When using a lube plate it should be a minimum of a ten inch diameter to prevent any damage from occurring to the hitch.

Different vehicles have different towing ratings or capacities. Please refer to your vehicle owner’s manual or contact the manufacturer to find your vehicle's capacity.