2001 CHEVROLET EXPRESS CARGO VAN turn signal

4-42 Maintenance When Trailer Towing
Your vehicle will need service more often when you're
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transmission fluid (don't overfill),
engine oil, axle lubricant, belt, cooling system and brake
system. Each of these is covered in this manual, and the
Index will help you find them quickly. If you're trailering,
it's a good idea to review these sections before you
start your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Trailer Wiring Harness
The optional heavy-duty trailer wiring package is a
seven
-wire harness assembly. The four-wire portion of
the harness assembly is stored under the vehicle, along
the driver's side rear corner of the frame rail. The
three
-wire portion of the harness assembly is stored in a
frame pocket under the rear of the vehicle, on the
driver's side. The heavy
-duty trailer wiring harness has
a 30
-amp feed wire. Both harnesses come without
connectors and should be wired by a qualified electrical
technician. The technician can use the following color
code chart when connecting the wiring harness to
your trailer.Four
-Wire Harness

Light Green: Back
-up lamps

Brown: Parking lamps

Yellow: Left stoplamp and turn signal

Dark Green: Right stoplamp and turn signal
Three
-Wire Harness

Dark Blue: Use for electric trailer brakes
(seven
-wire harness only)

Orange: Trailer accessory (seven
-wire harness only)

White (heavy gage): Ground wire
Securely attach the harness to the trailer, then tape or
strap it to your vehicle's frame rail. Be sure you leave it
loose enough so the wiring doesn't bend or break, but
not so loose that it drags on the ground. Store the
harness in its original place. Wrap the harness together
and tie it neatly so it won't be damaged.

5-2
Hazard Warning Flashers
Your hazard warning flashers let you warn others. They
also let police know you have a problem. Your front and
rear turn signal lamps will flash on and off.
Push the button located at
the top of the steering
column all the way down to
make your front and rear
turn signals flash on and off.
Your hazard warning flashers work no matter what
position your key is in, and even if the key isn't in.
To turn off the flashers, push the button until the
first click and release.
When the hazard warning flashers are on, your turn
signals won't work.
The hazard warning flashers will not flash if the brakes
are applied.

6-35
5. Reinstall the new bulb into the socket and return it to
the headlamp assembly.
Front Parking/Turn Signal Lamps
To replace the front parking/turn signal lamps:
1. Remove the outer screws from the parking/turn
signal lamp lens assembly. (There are either two or
four screws, depending on your vehicle's trim level.)

6-36
2. Remove the lamp from the grille.
3. Squeeze the tab on the side of the bulb assembly
while turning it counterclockwise.
4. Remove the bulb assembly from the back of the lens
and replace the bulb.
5. Turn the socket clockwise to reinstall it in the lens
assembly. Reinstall the screws on the parking/turn
signal lamp assembly.
Sidemarker Lamps
1. Remove the screw from the top of the lens.