GMC C-Series 2001, Owner'S Manual

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Speedometer and Odometer
Your speedometer lets you see your speed in both miles
per hour (mph) and kilometers per hour (km/h).
Your odometer shows how far your vehicle has been
driven, in either miles (used in the United States) or
kilometers (used in Canada).
Your odometer is tamper
-
resistant. The odometer will
show silver lines between the numbers if someone tries
to turn it back.
You may wonder what happens if your vehicle needs a
new odometer installed. If the new one can be set to the
mileage total of the old odometer, then it must be. But if
it can’t, then it’s set at zero, and a label must be put on
the driver’s door to show the old mileage reading when
the new odometer was installed.
Engine Speed Governor
All gasoline engines have a electronic engine speed
governor. The engine governed speeds range between
3,600 and 4,000 rpm depending on model, engine size
and option content.
Engine Road Speed Governor (Gasoline Engine)
This system controls maximum vehicle speed
automatically and reduces engine power until vehicle
speed gets down to maximum governed speed.
A 75 mph (120 km/h) road speed governor is standard,
but is optionally available in 60 or 65 mph (97 or
105 km/h) speeds, depending on model.