GMC 2003 Envoy - Manual (Page 291)

Driving with a Traiter
li you have a rear-mosl window open and you
pull
a trailer with your vehicle, carbon
monoxide (CO) CduLd come into your vehicle^
You can't aee cr ameil CO. it can cause
unconsciousness or dealh. See ‘"Engine
ExhausV' In the Index. To maxFmIze your safely
when towing a trailer:
* Have your exhaust system inspected tor
leaks, and make necessary repairs before
starling on your trip.
* Keep the rear-most windows closed.
* It exhaust does coma into your vehicle
through a window in the rear or another
Opening^ drive with your fronts main heating
or coolirtg system on and whh the far> on
any speed. This will
bring fresh, outside air
into your vehicle. Do not use the climate
control
Setting lor maximum air because it
only recirculates the air inside your vehicle.
See “Climate Controls^ in the Index.
Towing a trailer repuires a certain amount of екрегвгнм.
Belors setting out Гог Ihe open road, you'll want to get
to know your rig. Acquaint your self with the tee I of
handling anid braking w.lth the added weight of the trailer.
And always keep In mind that the vehicle you are
driving is now a good deal longer end not nearly as
responsive as your vehicle is hy itself.
Beloro you stap, check the trailer hilch and plattorifri
[and attachments), safely chains, electncai connector,
lamps, tires and' mirror adjustment. If the trailer has
electric brakes, siart your vehicle and trailer moving and
then apply the Irailar brake centrolEar by hand to be
sure the brakes are working. This lets you check your
etectrical connection at the same Irma.
During your trip, check occasionally to be sure that ihe
bad is secure, and that Iha lamps and any trailer
brakes are sUII working.
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