cooling GMC SIERRA 2001 Owner's Guide

6-34 What to Use
Use a mixture of one-half clean, drinkable water and
one
-half DEX-COOL
coolant which won't damage
aluminum parts. If you use this coolant mixture,
you don't need to add anything else.
CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid like alcohol, can boil before the proper
coolant mixture will. Your vehicle's coolant
warning system is set for the proper coolant
mixture. With plain water or the wrong mixture,
your engine could get too hot but you wouldn't
get the overheat warning. Your engine could
catch fire and you or others could be burned.
Use a 50/50 mixture of clean, drinkable water
and DEX
-COOL
coolant.
NOTICE:
If you use an improper coolant mixture, your
engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
warranty. Too much water in the mixture can
freeze and crack the engine, radiator, heater core
and other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
NOTICE:
If you use the proper coolant, you don't have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.

6-60
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use
the correct wheel, wheel bolts and wheel nuts
for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.
Whenever a wheel, wheel bolt or wheel nut is replaced
on a dual wheel setup, check the wheel nut torque after
100, 1,000 and 6,000 miles (160, 1 600 and 10 000 km)
of driving. For proper torque, see ªWheel Nut Torqueº
in the Index.
See ªChanging a Flat Tireº in the Index for
more information.

6-81 Cooling System Capacity
After refill, the level must be rechecked. See ªCooling Systemº in the Index.
Engine Transmission Quantity
VORTEC 4300 V6 Automatic 12.6 quarts (11.9 L)
VORTEC 4300 V6 Manual 12.9 quarts (12.2 L)
VORTEC 4800 V8 Automatic 13.4 quarts (12.7 L)
VORTEC 4800 V8 Manual 13.7 quarts (13.0 L)
VORTEC 5300 V8 Automatic 13.4 quarts (12.7 L)
VORTEC 5300 V8** Automatic 14.9 quarts (14.1 L)
VORTEC 6000 V8 Automatic 14.8 quarts (14.0 L)
VORTEC 6000 V8* Automatic 14.4 quarts (13.6 L)
VORTEC 6000 V8 Manual 15.2 quarts (14.4 L)
VORTEC 6000 V8* Manual 14.8 quarts (14.0 L)
VORTEC 6600 V8 Manual 20.7 quarts (19.6 L)
VORTEC 6600 V8 Automatic 20.3 quarts (19.2 L)
VORTEC 8100 V8 Manual 21.1 quarts (20.0 L)
VORTEC 8100 V8 Automatic 20.7 quarts (19.6 L)
* Vehicles equipped with the optional engine oil cooler.
** Vehicles equipped with the optional air conditioner.

Scheduled Maintenance -- Gasoline Engines
7-17
150,000 Miles (240 000 km)

Drain, flush and refill cooling system (or every 60 months since last service,
whichever occurs first). See ªEngine Coolantº in the Index for what to use.
Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test
the cooling system and pressure cap.
An Emission Control Service.

Change five
-speed manual transmission fluid
(with 4300 V6 or 4800 V8 engines only).
200,000 Miles (332 000 km)

6000 V8 Engine Only: Change five-speed manual transmission fluid.
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

7-23
Part C: Periodic
Maintenance Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall). You should let your dealer's
service department or other qualified service center
do these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures to perform these services may be
found in a service manual. See ªService and Owner
Publicationsº in the Index.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook
-up, binding, leaks,
cracks, chafing, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the
body near the exhaust system. Look for broken,
damaged, missing or out
-of-position parts as well as
open seams, holes, loose connections or other conditions
which could cause a heat build
-up in the floor pan or
could let exhaust fumes into the vehicle. See ªEngine
Exhaustº in the Index.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of the
cooling system and pressure cap is recommended at
least once a year.