Starting And Operating Your Vehicle - GMC 2010 T-Series Owner's Manual

Starting and Operating Your
Vehicle
New Vehicle Break-In
Notice: The 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
the 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 2 26.
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