2004 CHEVROLET COLORADO automatic transmission

Vehicle Axle Ratio Maximum Trailer Weight GCWR**
4WD Regular Cab
Automatic Transmission,
2.8 L Engine3.73 3,100 lbs. (1 406 kg) 7,000 lbs. (3 175 kg)
Automatic Transmission,
2.8 L Engine4.10 3,100 lbs. (1 406 kg) 7,000 lbs. (3 175 kg)
Automatic Transmission,
3.5 L Engine3.42 4,000 lbs. (1 814 kg) 8,500 lbs. (3 856 kg)
Automatic Transmission,
3.5 L Engine3.73 4,000 lbs. (1 814 kg) 9,000 lbs. (4 082 kg)
Automatic Transmission,
3.5 L Engine4.10 4,000 lbs. (1 814 kg) 9,000 lbs. (4 082 kg)
Manual Transmission,
2.8 L Engine3.73 2,100 lbs. (952 kg) 6,000 lbs. (2 722 kg)
Manual Transmission,
2.8 L Engine4.10 2,100 lbs. (952 kg) 6,000 lbs. (2 722 kg)
Manual Transmission,
3.5 L Engine3.42 3,100 lbs. (1 406 kg) 7,000 lbs. (3 175 kg)
Manual Transmission,
3.5 L Engine3.73 3,600 lbs. (1 632 kg) 7,500 lbs. (3 402 kg)
Manual Transmission,
3.5 L Engine4.10 3,500 lbs. (1 587 kg) 7,500 lbs. (3 402 kg)
4-61

Vehicle Axle Ratio Maximum Trailer Weight GCWR**
4WD Extended Cab
Automatic Transmission,
2.8 L Engine3.73 2,900 lbs. (1 315 kg) 7,000 lbs. (3 175 kg)
Automatic Transmission,
2.8 L Engine4.10 2,900 lbs. (1 315 kg) 7,000 lbs. (3 175 kg)
Automatic Transmission,
3.5 L Engine3.42 4,000 lbs. (1 814 kg) 8,500 lbs. (3 856 kg)
Automatic Transmission,
3.5 L Engine3.73 4,000 lbs. (1 814 kg) 9,000 lbs. (4 082 kg)
Automatic Transmission,
3.5 L Engine4.10 4,000 lbs. (1 814 kg) 9,000 lbs. (4 082 kg)
Manual Transmission,
2.8 L Engine4.10 1,900 lbs. (861 kg) 6,000 lbs (2 722 kg)
Manual Transmission,
3.5 L Engine3.42 2,900 lbs. (1 315 kg) 7,000 lbs. (3 175 kg)
Manual Transmission,
3.5 L Engine3.73 3,400 lbs. (1 542 kg) 7,500 lbs. (3 402 kg)
Manual Transmission,
3.5 L Engine4.10 3,300 lbs. (1 496 kg) 7,500 lbs. (3 402 kg)
4-62

Vehicle Axle Ratio Maximum Trailer Weight GCWR**
4WD Crew Cab
Automatic Transmission,
2.8 L Engine3.73 2,800 lbs. (1 270 kg) 7,000 lbs. (3 175 kg)
Automatic Transmission,
2.8 L Engine4.10 2,800 lbs. (1 270 kg) 7,000 lbs. (3 175 kg)
Automatic Transmission,
3.5 L Engine3.42 4,000 lbs. (1 814 kg) 8,500 lbs. (3 856 kg)
Automatic Transmission,
3.5 L Engine3.73 4,000 lbs. (1 814 kg) 9,000 lbs. (4 082 kg)
Automatic Transmission,
3.5 L Engine4.10 4,000 lbs. (1 814 kg) 9,000 lbs. (4 082 kg)
Manual Transmission,
2.8 L Engine4.10 1,800 lbs. (816 kg) 6,000 lbs. (2 721 kg)
**The Gross Combination Weight Rating (GCWR) is the
total allowable weight of the completely loaded vehicle
and trailer including any passengers, cargo, equipment
and conversions. The GCWR for your vehicle should
not be exceeded.
You can ask your dealer for our trailering information or
advice, or you can write us at the address listed in your
Warranty and Owner Assistance Information Booklet.In Canada, write to:
General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
4-63

Backing Up
Hold the bottom of the steering wheel with one hand.
Then, to move the trailer to the left, just move that hand
to the left. To move the trailer to the right, move your
hand to the right. Always back up slowly and, if possible,
have someone guide you.
Making Turns
Notice:Making very sharp turns while trailering
could cause the trailer to come in contact with the
vehicle. Your vehicle could be damaged. Avoid
making very sharp turns while trailering.
When you’re turning with a trailer, make wider turns than
normal. Do this so your trailer won’t strike soft shoulders,
curbs, road signs, trees or other objects. Avoid jerky or
sudden maneuvers. Signal well in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have extra
wiring and a heavy-duty turn signal asher.
The arrows on your instrument panel will ash whenever
you signal a turn or lane change. Properly hooked up,
the trailer lamps will also ash, telling other drivers
you’re about to turn, change lanes or stop.When towing a trailer, the arrows on your instrument
panel will ash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind
you are seeing your signal when they are not. It’s
important to check occasionally to be sure the trailer
bulbs are still working.
Driving On Grades
Reduce speed and shift to a lower gear before you start
down a long or steep downgrade. If you don’t shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
When towing at high altitude on steep uphill grades,
consider the following: Engine coolant will boil at a lower
temperature than at normal altitudes. If you turn your
engine off immediately after towing at high altitude
on steep uphill grades, your vehicle may show signs
similar to engine overheating. To avoid this, let the
engine run while parked (preferably on level ground)
with the automatic transmission in PARK (P) (or
the manual transmission out of gear and the parking
brake applied) for a few minutes before turning the
engine off. If you do get the overheat warning,
seeEngine Overheating on page 5-28.
4-67

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:
start your engine,
shift into a gear, and
release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store
the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re
pulling a trailer. SeeScheduled Maintenance on
page 6-4for more on this. Things that are especially
important in trailer operation are automatic transmission
uid (don’t overll), engine oil, axle lubricant, belt,
cooling system and brake system. Each of these is
covered in this manual, and the Index will help you nd
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.
4-69

Service............................................................5-3
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of
Your Vehicle..............................................5-4
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-6
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-13
Engine Air Cleaner/Filter................................5-18
Automatic Transmission Fluid.........................5-19
Manual Transmission Fluid.............................5-22
Hydraulic Clutch (Manual Transmission)...........5-24
Engine Coolant.............................................5-25
Radiator Pressure Cap..................................5-28Engine Overheating.......................................5-28
Cooling System............................................5-30
Engine Fan Noise.........................................5-36
Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-37
Brakes........................................................5-39
Battery........................................................5-42
Jump Starting...............................................5-43
Rear Axle.......................................................5-48
Four-Wheel Drive............................................5-48
Front Axle......................................................5-49
Bulb Replacement..........................................5-50
Halogen Bulbs..............................................5-50
Headlamps..................................................5-50
Front Turn Signal, Sidemarker and Daytime
Running Lamps.........................................5-52
Center High-Mounted Stoplamp (CHMSL).........5-53
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps.........................................5-53
Replacement Bulbs.......................................5-54
Windshield Wiper Blade Replacement..............5-55
Section 5 Service and Appearance Care
5-1

A. Windshield Washer Fluid. SeeWindshield Washer
Fluid on page 5-37.
B. Coolant Recovery Tank. SeeEngine Coolant
on page 5-25.
C. Power Steering Fluid Reservoir (low in engine
compartment). SeePower Steering Fluid
on page 5-36.
D. Transmission Fluid Dipstick. SeeAutomatic
Transmission Fluid on page 5-19andManual
Transmission Fluid on page 5-22.
E. Engine Oil Dipstick. SeeEngine Oil on page 5-13.
F. Brake Fluid Reservoir. SeeBrakes on page 5-39.
G. Battery. SeeBattery on page 5-42.
H. Hydraulic Clutch Fluid Reservoir (If Equipped). See
Hydraulic Clutch (Manual Transmission)
on page 5-24.
I. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-18.
J. Engine Oil Fill Cap. SeeEngine Oil on page 5-13.
K. Radiator Pressure Cap. SeeCooling System
on page 5-30.
L. Remote Negative (−) Terminal. SeeJump Starting
on page 5-43.M. Remote Positive (+) Terminal. SeeJump Starting
on page 5-43.
N. Engine Compartment Fuse Block. SeeFuses and
Circuit Breakers on page 5-104.
Engine Oil
Checking Engine Oil
It is a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the oil
must be warm and the vehicle must be on level ground.
The engine oil dipstick handle is a yellow loop. See
Engine Compartment Overview on page 5-12for
the location of the engine oil dipstick.
Turn off the engine and give the oil several minutes to
drain back into the oil pan. If you don’t, the oil
dipstick might not show the actual level.
5-13

{CAUTION:
Operating the engine with the air cleaner/lter
off can cause you or others to be burned. The
air cleaner not only cleans the air, it helps to
stop ame if the engine backres. If it is not
there and the engine backres, you could be
burned. Do not drive with it off, and be
careful working on the engine with the air
cleaner/lter off.
Notice:If the air cleaner/lter is off, a backre can
cause a damaging engine re. And, dirt can
easily get into your engine, which will damage it.
Always have the air cleaner/lter in place when you
are driving.
Automatic Transmission Fluid
When to Check and Change
A good time to check your automatic transmission uid
level is when the engine oil is changed.
Change both the uid and lter every 50,000 miles
(83 000 km) if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police or
delivery service.
If you do not use your vehicle under any of these
conditions, change the uid and lter every
100,000 miles (166 000 km).
SeeScheduled Maintenance on page 6-4.
5-19