Starting And Operating Your Vehicle; New Vehicle Break-In; Ignition Positions - GMC Sierra Denali Owner's Manual

Starting and Operating Your
Vehicle
New Vehicle Break-In
Notices Your vehicle doesn't need an elaborate
"break-in." But it will perform better in the long run
if you follow these guidelines:
*
Keep your speed at 55 mph (88 km/h) or less for
the first 500 miles (805 km).
Don't drive at any one speed
-
fast or slow
-
for
the first 500 miles (805 km). Don't make
full-throttle starts.
Avoid making hard stops for the first 200 miles
(322 km) or so. During this time your new brake
linings aren't 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.
Don't tow a trailer during break-in. See "Towing a
Trailer" in the Index for more information.
Ignition Positions
With your key in the ignition switch you can turn it to
four different positions.
c
A
~~~ ~
Notice: If your key seems stuck in LOCK and you
can't turn it, be sure you are using the correct key; if
so, is it all the way in? Turn the key only with
your hand. Using a tool to force it could break the
key or the ignition switch. If none of these works,
then your vehicle needs service.
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