2005 CHEVROLET COLORADO ECU

Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixture at the coolant recovery tank.
{CAUTION:
Turning the radiator pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn
you badly. With the coolant recovery tank, you
will almost never have to add coolant at the
radiator. Never turn the radiator pressure
cap — even a little — when the engine and
radiator are hot.
Add coolant mixture at the recovery tank, but be careful
not to spill it.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
Occasionally check the coolant level in the radiator.
For information on how to add coolant to the radiator,
seeCooling System on page 5-29.
Radiator Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
SeeEngine Compartment Overview on page 5-12for
more information on location.
5-27

4. Then ll the coolant recovery tank to the
FULL COLD mark.
5. Reinstall the cap on the coolant recovery tank,
but leave the radiator pressure cap off.6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fan.
7. By this time, the coolant level inside the radiator
ller neck may be lower. If the level is lower, add
more of the proper DEX-COOL
®coolant mixture
through the ller neck until the level reaches
the base of the ller neck.
Then replace the pressure cap. At any time
during this procedure if coolant begins to ow
out of the ller neck, reinstall the pressure cap.
Be sure to secure it tightly.
5-33

Tire Inspection and Rotation
Tires should be rotated every 5,000 to 8,000 miles
(8 000 to 13 000 km).
Any time you notice unusual wear, rotate your tires as
soon as possible and check wheel alignment. Also
check for damaged tires or wheels. SeeWhen It Is Time
for New Tires on page 5-61andWheel Replacement
on page 5-64for more information.
Make sure the spare tire is stored securely. Push,
pull, and then try to rotate or turn the tire. If it moves,
use the wheel wrench to tighten the cable. See
Changing a Flat Tire on page 5-68.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The rst rotation
is the most important, seeScheduled Maintenance
on page 6-4.When rotating your tires, always use one of the correct
rotation patterns shown here.
If your vehicle has a compact spare tire or a spare
tire that does not match your vehicle’s road tires and
wheels, in size and type, do not include the spare in the
tire rotation.
After the tires have been rotated, adjust the front and
rear ination pressures as shown on the Tire and
Loading Information label. For the location of the tire
and loading information label seeLoading Your Vehicle
on page 4-42. Make certain that all wheel nuts are
properly tightened, see “Wheel Nut Torque” under
Capacities and Specications on page 5-103for the
proper wheel nut torque specication.
5-60

Tire Chains
{CAUTION:
If your vehicle has P225/75R15, P265/75R15,
P235/75R15, P235/50R17 or P235/50R18 size
tires, do not use tire chains. They can damage
your vehicle because there is not enough
clearance. Tire chains used on a vehicle
without the proper amount of clearance can
cause damage to the brakes, suspension or
other vehicle parts. The area damaged by the
tire chains could cause you to lose control
of your vehicle and you or others may be
injured in a crash.
Use another type of traction device only
if its manufacturer recommends it for use on
your vehicle and tire size combination and
road conditions. Follow that manufacturer’s
CAUTION: (Continued)
CAUTION: (Continued)
instructions. To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it is contacting your vehicle, and do
not spin the vehicle’s wheels.
If you do nd traction devices that will t,
install them on the rear tires.
Notice:If your vehicle has a tire size other than
P225/75R15, P265/75R15, P235/75R15, P235/50R17 or
P235/50R18 use tire chains only where legal and
only when you must. Use chains that are the proper
size for your tires. Install them on the tires of the
rear axle. Do not use chains on the tires of the front
axle. Tighten them as tightly as possible with the
ends securely fastened. Drive slowly and follow the
chain manufacturer’s instructions. If you can
hear the chains contacting your vehicle, stop and
retighten them. If the contact continues, slow down
until it stops. Driving too fast or spinning the
wheels with chains on will damage your vehicle.
5-66

For regular and extended
cab vehicles, the jack and
wheel blocks are located
under the cover at the
center of the vehicle
behind the front seats.
The vehicle will have a cover if it is an extended or
regular cab.To access the tools, do the following:
1. Move the seats forward
to access the cover.
2. Turn the wing nut on the cover counterclockwise to
remove it.
For crew cab models, reach under the rear seat to
access the jack and wheel blocks. To reinstall the
jack and wheel block assembly in the mounting
bracket, insert the tabs into the jack base by pushing
the blocks up into the assembly. The outer hole in the
jack base aligns with the tab on the bracket. When
reinstalling, make sure the jack is secure, but do not
overtighten the jack in the bracket. Regular/Extended Cab
Extended/Regular Cab
5-70

If the at tire is on the rear, position the jack under
the rear axle and get as close as possible to the
shock absorber.
4. Make sure the jack head is positioned so that the
rear axle is resting securely between the grooves
that are on the jack head.5. Turn the wheel wrench clockwise to raise the
vehicle. Raise the vehicle far enough off the ground
so there is enough room for the spare tire to t
under the wheel well.
6. Remove all the wheel
nuts and take off the
at tire.
Rear Position
5-76

4. Repeat this procedure at least two times. If the
spare tire lowers to the ground, continue with
Step 5 underRemoving the Spare Tire and Tools
on page 5-69.
5. Turn the wrench counterclockwise until
approximately 6 inches (15 cm) of cable is exposed.
6. Stand the wheel blocks on their shortest ends, with
the backs facing each other.
7. Place the bottom edge
of the jack (A) on the
wheel blocks (B),
separating them so that
the jack is balanced
securely.
8. Attach the jack handle, extension, and wheel
wrench to the jack and place it (with the wheel
blocks) under the vehicle towards the front of the
rear bumper. Position the center lift point of the
jack under the wheel.
9. Turn the wrench clockwise to raise the jack until it
lifts the tire.
10. Continue raising the jack until the tire stops moving
upward and is held rmly in place, the secondary
latch has released and the tire is balancing on
the jack.
5-81

4. Insert the hoist end through the hole in the rear
bumper and into the funnel-shaped guide.
5. Turn the wheel wrench clockwise to raise the
tire part way up. Make sure the retainer is seated
in the wheel opening and the valve stem is
pointed down.
6. Raise the tire fully against the underside of the
vehicle by turning the wheel wrench clockwise
until you feel it skip twice. You cannot overtighten
the cable.7. Make sure the tire is stored securely. Push, pull (A),
and then try to turn (B) the tire. If the tire moves,
check to make sure the tire valve stem is pointing
down, then use the wheel wrench to loosen
and then tighten the cable.
5-85