Drive Systems; All-Wheel Drive - GMC 2014 Terrain Owner's Manual

9-30 Driving and Operating
Press the eco (economy) button
next to the shift lever to turn this
feature on or off. The eco light in the
instrument cluster will come on
when engaged. See
. A Driver
Information Center (DIC) message
is also displayed. See
When Fuel Economy Mode is on:
The transmission will upshift
sooner and downshift later.
The torque converter clutch will
apply sooner and stay on longer.
The gas pedal will be less
sensitive.
The vehicle's computer will more
aggressively shut off fuel to the
engine under deceleration.
The engine idle speed will be
lower.
Driving performance is more
conservative.
The climate controls may take
longer to heat or cool the cabin.
The rear defogger will stay on
for shorter periods of time.
.

Drive Systems

All-Wheel Drive

Vehicles with this feature transfer
engine power, as required, to all
four wheels. It is fully automatic, and
adjusts itself as needed for road
conditions.
When using a compact spare tire on
an AWD vehicle, the system
automatically detects the compact
spare and reduces AWD
performance to protect the system.
To restore full AWD operation and
prevent excessive wear on the
system, replace the compact spare
with a full-size tire as soon as
possible. See
.