Chevrolet ENCLAVE - NAVIGATION SYSTEM 2008 Specifications download pdf (Page 294)

Consider the following example:

A vehicle model base weight is 5,500 lbs (2 495 kg);

2,800 lbs (1 270 kg) at the front axle and 2,700 lbs

(1 225 kg) at the rear axle. It has a GVWR of 7,200 lbs

(3 266 kg), a RGAWR of 4,000 lbs (1 814 kg) and

a GCWR (Gross Combination Weight Rating) of

14,000 lbs (6 350 kg). The trailer rating should be:

You can expect tongue weight to be at least 10 percent of

trailer weight (850 lbs (386 kg)) and because the weight

is applied well behind the rear axle, the effect on the rear

axle will be greater than just the weight itself, as much as

1.5 times as much. The weight at the rear axle could be

850 lbs (386 kg) X 1.5 = 1,275 lbs (578 kg). Since the

rear axle already weighs 2,700 lbs (1 225 kg), adding

1,275 lbs (578 kg) brings the total to 3,975 lbs (1 803 kg).

This is very close to, but within the limit for RGAWR

as well. The vehicle is set to trailer up to 8,500 lbs

(3 856 kg).

But let us say your speciﬁc vehicle is equipped with some

of the latest options and you have a front seat passenger

and two rear seat passengers with some luggage and

gear in the vehicle as well. You may add 300 lbs (136 kg)

to the front axle weight and 400 lbs (181 kg) to the rear

axle weight. Your vehicle now weighs:

Weight is still below 7,200 lbs (3 266 kg) and you may

think that you should subtract 700 additional pounds

(318 kg) from your trailering capacity to stay within

GCWR limits. Your maximum trailer would only be

7,800 lbs (3 538 kg). You may go further and think you

must limit tongue weight to less than 1,000 lbs (454 kg)

to avoid exceeding GVWR. But, you must still consider

the effect on the rear axle. Because your rear axle now

weighs 3,100 lbs (1 406 kg), you can only put 900 lbs

(408 kg) on the rear axle without exceeding RGAWR.

The effect of tongue weight is about 1.5 times the actual

weight. Dividing the 900 lbs (408 kg) by 1.5 leaves you

with being able to handle only 600 lbs (272 kg) of tongue

weight. Since tongue weight is usually at least 10 percent

of total loaded trailer weight, you can expect that the

largest trailer your vehicle can properly handle is

6,000 lbs (2 721 kg).

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Chevrolet ENCLAVE - NAVIGATION SYSTEM 2008 Specifications Page 294