GMC 2007 Acadia - Manual (Page 507)

(g) 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.
(h) Change automatic transmission fluid 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.
(i) Drain, flush, and refill cooling system.
This service can be complex; you should have
your dealer/retailer perform this service. See
Engine Coolant on page 406 for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap, and filler neck. Pressure test the cooling
system and pressure cap.
(j) Check system for interference or binding and
for damaged or missing parts. Replace parts
as needed. Replace any components that have
high effort or excessive wear. Do not lubricate
accelerator or cruise control cables.
(k) Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
(l) 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 dealer/retailer
can assist 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 511.
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