Part B: Owner Checks And Services; Engine Coolant Level Check; At Each Fuel Fill; At Least Twice A Year - GMC 2003 GMT560 T-Series Owner's Manual

Part B: Owner Checks and Services

Listed in this part are owner checks and services
which should be performed at the intervals specified to
help ensure the safety, dependability and emission
control performance of your vehicle.
For your safety and that of others, any of the
safety-related components that may have been
damaged in an accident should be checked and any
needed repairs made before operating the vehicle.
At the minimum, these routine checks should be made
every 6 months or 6,000 miles (10 000 km), whichever
occurs first. Whenever repairs are needed, have
them completed before operating the vehicle.

At Each Fuel Fill

It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.

Engine Oil Level Check

Check the engine oil level and add the proper oil if
necessary. See Engine Oil (DURAMAX™ Diesel) on
page 5-9 for further details.
6-22

Engine Coolant Level Check

Check the engine coolant level and add DEX-COOL
coolant mixture if necessary. See Engine Coolant
on page 5-16 for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer tank and add the proper fluid if necessary.
See Cleaning the Outside of Your Vehicle on page 5-60
for further details.
Tire Inflation Check
Check tire inflation cold. Make sure tires are inflated to
the pressures specified on the GVW Rating label.
See Loading Your Vehicle on page 4-37 and Tires on
page 5-48 for further details.

At Least Twice a Year

Restraint System Check
Make sure the safety belt reminder light (if equipped)
and all your belts, buckles, latch plates, retractors
and anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, have it repaired. Have any torn or frayed
safety belts replaced.
®