Chevrolet 2007 Avalanche Owner's Manual page 422

If You Do Decide To Pull A Trailer
If you do, here are some important points:
•
There are many different laws, including speed
limit restrictions, having to do with trailering.
Make sure your rig will be legal, not only where
you live but also where you'll be driving. A
good source for this information can be state
or provincial police.
•
Consider using a sway control. See "Hitches"
later in this section.
•
Don't tow a trailer at all during the first
500 miles (800 km) your new vehicle is driven.
Your engine, axle or other parts could be
damaged.
•
Then, during the first 500 miles (800 km) that
you tow a trailer, don't drive over 50 mph
(80 km/h) and don't make starts at full throttle.
This helps your engine and other parts of
your vehicle wear in at the heavier loads.
422
•
You can tow in DRIVE (D). You may want to
shift the transmission to THIRD (3) or, if
necessary, a lower gear selection if the
transmission shifts too often (e.g., under heavy
loads and/or hilly conditions). See "Tow/Haul
Mode" later in this section.
Three important considerations have to do with
weight:
•
the weight of the trailer,
•
the weight of the trailer tongue
•
and the weight on your vehicle's tires.