Starting And Operating Your Vehicle; New Vehicle Break-In - GMC T-Series 2007 Owner's Manual

Starting and Operating Your
Vehicle

New Vehicle Break-In

Notice: Your vehicle does not need an
elaborate break-in. But it will perform better in
the long run if you follow these guidelines:
•
Let the engine warm up before you operate
your vehicle under load.
•
Keep your speed at 55 mph (88 km/h) or
less for the first 500 miles (805 km).
•
Do not drive at any one speed, fast or
slow, for the first 500 miles (805 km).
Do not make full-throttle starts.
•
Avoid making hard stops for the first
200 miles (322 km) or so. During this time
the new brake linings are not yet broken
in. Hard stops with new linings can
mean premature wear and earlier
replacement. Follow this breaking-in
guideline every time you get new brake
linings.
•
Use the lowest gear you can when you
start a loaded vehicle in motion and
when going up hills to avoid overloading
the engine.
•
Check and adjust engine and transmission
fluid levels often and be sure tires are
properly inflated for the load you are
carrying.
•
When new, parking brake linings have not
yet been broken in. When linings are new,
it is possible that the vehicle could move
while the parking brake is applied. Before
using the parking brake on grades, follow
the parking brake burnish procedure.
See Parking Brake Burnish Procedure
on page 85.
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