2008 NISSAN SENTRA fuel

2008 Nissan Towing Guide 11 tow weight ratings. There are four weights to consider when towing:
Š Gross Vehicle Weight
Š Gross Axle Weight (Front and Rear)
Š Gross Combined Weight
Š Trailer Tongue/King Pin Load

These ratings are based upon normal highway driving and may be reduced if operating in
reduced-traction situations, for example, slippery boat ramps.
NOTE – Attempting to tow loads greater than the GVWR, GAWR, GCWR, and the trailer
tongue/king pin load specified could adversely affect vehicle handling, braking, and
performance. Damage to your vehicle resulting from overloading may not be covered by your
vehicle warranty.














GROSS VEHICLE WEIGHT (GVW)
The Gross Vehicle Weight (GVW) is the total weight of the vehicle, plus passengers, cargo,
fuel, hitch, trailer tongue/king pin load, and any optional equipment.
The best way to determine the GVW is by having the vehicle — loaded and ready to
tow — weighed at a public scale. To that figure, add the combined weight of all passengers.
Then, add the trailer tongue/king pin load to determine the approximate GVW. The GVW you
come up with must not exceed the Gross Vehicle Weight Rating (GVWR) for your
vehicle.

2008 Nissan Towing Guide 13










GROSS COMBINED WEIGHT (GCW)
The Gross Combined Weight (GCW) is the total weight of the tow vehicle with all
passengers, cargo, and fuel, plus the total weight of the trailer and all its cargo.
To determine the GCW, simply weigh your vehicle when fully loaded and ready to tow, and
add in the weight of the loaded trailer.
The GCW you come up with must not exceed the Gross Combined Weight Rating
(GCWR) for your vehicle. See the SPECIFICATIONS section of this guide or refer to your
vehicle owner’s manual to view the GCWR listed for your vehicle.

TRAILER TONGUE/KING PIN LOAD
The amount of weight pressing down on the tow vehicle hitch is called trailer tongue load
(conventional trailer) or king pin load (5th wheel or gooseneck trailers).
To measure trailer tongue/king pin load, place the tongue of the trailer on a scale when the
trailer is not attached to the
vehicle. A separate vehicle
jack — not the trailer jack —
should be used, as the
location of the trailer jack is
rearward of the trailer tongue
and will not give you an
accurate measurement of the
true tongue/king pin load.
Make sure the vehicle jack is
placed directly under the
trailer tongue coupler, and the tongue is set at the height/level of the tow vehicle hitch.
For proper handling, you must keep conventional trailer tongue load between 10-15% of
the actual trailer weight, within the limits of the maximum trailer tongue load allowable. For

2008 Nissan Towing Guide 19 move the wheel to the right. All movements of the wheel should be done in small increments.
Of course, backing up should be done only at very slow speeds. For large trailers that
obstruct your rearward vision, have someone outside the vehicle act as a “spotter” to guide
you along.

PARK SMART
A tow vehicle and trailer can be an unwieldy combination in a small area, so always try to park
where you will have a relatively easy time maneuvering. Once parked, always block the wheels
on both the tow vehicle and the trailer.
Parking on a slope is not recommended. If, however, you must park on a slope and your
vehicle is equipped with an automatic transmission, there are some precautions you should
take:
Š Have someone block the wheels once the tow vehicle and trailer are in position and being
held by the vehicle’s brake.
Š Next, apply the parking brake and only then move the gear lever into PARK. If you move the
lever into PARK before blocking the wheels and applying the parking brake, transmission
damage may occur.

HIGH-ALTITUDE PERFORMANCE
An engine will lose about 4% of its performance for every 1,000 feet above sea level that you
travel. If you will be towing in high altitudes, it is a good idea to allow more time than usual due
to the engine’s reduced performance.

TOW MODE (IF EQUIPPED)
Tow Mode should be used when the vehicle and trailer weight is at least 75% of the vehicle
GCWR. This mode is most useful when towing a heavy trailer or hauling a heavy load,
particularly when stop-and-go traffic, rolling terrain, or a busy parking lot is involved.
Driving the vehicle in Tow Mode with minimal trailer load will not cause any damage;
however, fuel economy may be reduced and transmission/engine driving characteristics may
feel different.

HILLS – UPGRADES
As the incline increases, shift down to a lower gear to maintain speed and prevent the engine
from lugging. However, for long and steep grades, do not stay in first gear when driving above
35 mph or in second gear above 58 mph. The added weight of a trailer places an increased
load on the engine and cooling system, so monitor your coolant temperature gauge and

2008 Nissan Towing Guide 22


GOOSENECK HITCH Located just forward of the rear axle centerline, this hitch uses a
ball to serve as the pivot point for the trailer.

GROSS AXLE
WEIGHT RATING (GAWR)
The maximum amount of weight each vehicle axle (front and rear) is
designed to safely carry.

GROSS COMBINED
WEIGHT RATING (GCWR) The maximum allowable combined weight of the vehicle and trailer,
including passengers and all cargo.

GROSS VEHICLE
WEIGHT RATING (GVWR) The maximum allowable weight of the vehicle, including
passengers, cargo, fuel, hitch, trailer tongue load, and any optional
equipment.

KING PIN
LOAD The amount of trailer (5th wheel or gooseneck) weight pressing
down on the tow vehicle hitch.

HITCH BALL
A ball that connects the trailer to the tow vehicle hitch and provides
the means by which the trailer pivots during cornering. Available in
a number of sizes and weight capacities, it must correspond to the
trailer coupler size, and have a sufficient capacity rating for the
trailer being pulled.

RECEIVER HITCH A frame- or structure-mounted hitch with a receiver that allows
removal of the ball mount.

SAFETY CHAINS/CABLES Provides an emergency connection between the tow vehicle and
the trailer, should the trailer become disengaged for any reason.

SURGE BRAKES
Hydraulic-type braking system activated by inertia. As the tow
vehicle begins to brake, the trailer pushes against the hitch ball,
consequently activating the trailer brakes.

TRAILER TONGUE/COUPLER The part of the trailer that extends forward to meet the tow vehicle,
and also carries the coupler assembly.

TRAILER TONGUE
LOAD The amount of trailer (conventional) weight pressing down on the
tow vehicle hitch.

WEIGHT-DISTRIBUTING
HITCH SYSTEM Type of hitch system that helps shift the trailer tongue weight to all
trailer tires and the tow vehicle front tires. Strongly recommended
when towing trailers with a Maximum Trailer Weight greater than
5,000 lbs.

WIRING HARNESS
Provides an electrical connection linking the tow vehicle’s electrical
system to the trailer’s system.