GMC 2003 Savana - Manual (Page 239)

Trailer Brakes Driving with a Trailer
Jf your Trailer wgighs more than 1.0D0 lbs <450 kg)
loaded, lîien it needs ils own brakes - and they must be
adeguete. Be sure to read and follow the instrucHons
for the trailer brakes so you'll be able to install,
ad|usl and maintain them properly.
Your irailer brake system can tap Inlo your vehicle's
hydraulic brake syslemn except:
• Don't tap rntd your vehicle's brake system if the
trailer's brake system will usa more (ban 0.02 cubic
inch fo.3 cc) of fJuid from your vehicle’s master
cylinder. If it [Joes.H both braking systems worr't work
well. You could even lose your brakes.
' WIN (tie trail'er parts take 3.000 psi (20 650 kPa) of
pressure? II not. the trailer brake system must rrot
be used wjlh your vehicle.
■ If everything checks out this lar, Then imake The
brake fluid tap at the port on the master cylinder that
sends fluid to the rear brakes. Bui don't use
copper tubing for this. If you do, it will band and
finally break off. Use double-walled sleol tubing
1f you have a rear-^[nas4 window open and yPU
pull a Irailer with your vehicle, carbon
rnonoxide (CO) could come Into your vehicle.
You can’t or smell CO. It can cause
unconsciousiiEss or death. See "Engine
Exhaust"’ in the Index. To maxiTnize your safety
when towing a trailer:
* Have your exhaust systerm inspected lor
leaks, and make necessary repairs before
starting on your trip.
■ Keep the rear-mpsi windows closed.
• If exhaust does come into your vehicle
through a window in the rear or ar>other
opening, drive with your front, main
heating or cooling system on and with the
tan on any speed. This will bring fresh,
Outside air into your vehicle. Do not use
the cUnnate control setting for maximum air
because It only recirculates Ihe air inside
your vehicle. See '‘Climate Controls"' In the
Index.
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