GMC 2003 Sierra - Manual (Page 108)

starting and Operating Your
Vehicle
New Vehicle Break-in
Npficei Your vfihicte do&sn4 neitd art «(eborate
■‘break-in.'' But i1 will perform better in the long run
if you follow these guide lines:
• Keep your speed at 55 mph {ЪЗ km/hi or less for
the first 500 mi lea (BOS km).
• Don't drive at any one apeed — fast or
slow — for the first 500 miles (BOS km). Don't
make fuiHhrottle starts.
* Avoid making hard atops tor the first zoo miles
(322 km) or so. During this time your new
brake linings aren't yet broken irt. Hard stops
with new linings can mean premature wear and
earlier replacement. Follow I his breaking-in
guideline every time you get new brake linings.
* Don't tow a trailer during braak-in. See "Towing
a Trailer" in the Inde* for more information.
Ignition Positions
With the key in the Ignition switch, you can turn it to four
different poslUons.
A (LOCK): This posilion locks your ignition and manual
tгan5miss^c^n, it’s a Iheft-deterreot feature. You will
□n!y be able to remove your key when Ihe ignition Is
turned to LOCK.
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