Engine Oil Level Check; Engine Coolant Level Check; Owner Checks And Services; At Each Fuel Fill - GMC 2005 Sierra Denali Owner's Manual

(i) Drain, flush and refill cooling system. This service can
be complex; you should have your dealer perform this
service. See Engine Coolant on page 5-24 for what to
use. Inspect hoses. Clean radiator, condenser, pressure
cap and filler neck. Pressure test the cooling system and
pressure cap.
(j) A fluid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the fluid level checked. Add fluid if needed.
(k) If you drive regularly under dusty conditions, inspect
the filter at each engine oil change.

Owner Checks and Services

These owner checks and services should be performed
at the intervals specified to help ensure the safety,
dependability and emission control performance of your
vehicle. Your GM Goodwrench
you with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Recommended Fluids and Lubricants on page 6-12.

At Each Fuel Fill

It is important to perform these underhood checks at
each fuel fill.
®
dealer can assist

Engine Oil Level Check

Check the engine oil level and add the proper oil if
necessary. See Engine Oil on page 5-14 for further
details.
Notice: It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.

Engine Coolant Level Check

Check the engine coolant level and add
®
DEX-COOL coolant mixture if necessary. See Engine
Coolant on page 5-24 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.

At Least Once a Month

Tire Inflation Check
Visually inspect your tires and make sure tires are inflated
to the correct pressures. Do not forget to check your
spare tire. See Tires on page 5-56 for further details.
Check to make sure the spare tire is stored securely.
Push, pull and then try to turn the spare tire. If it moves,
tighten it. See Changing a Flat Tire on page 5-72.
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