GMC Hybrid 2006 Owner's Manual page 17

Automatic Engine Start/Stop Override
The automatic engine start/stop override feature may
cause the engine to remain running at a complete stop
or may start the engine at a complete stop. The following
are reasons why either of these conditions may be
encountered.
The engine will stay running at a complete stop or will
automatically start from a complete stop if:
•
The outside temperatures are high — usually above
95°F (35°C). The climate control system is working
to cool the cabin in AUTO mode. See Climate
Controls on page 3-2.
•
You release the brake pedal in DRIVE (D) or
THIRD (3) — even slightly.
•
The shift lever is in NEUTRAL, REVERSE (R),
SECOND (2) or FIRST (1).
•
The battery pack charge is low.
•
The tow/haul mode is active.
•
The transfer case is in 4LO.
•
The brake pedal has been released for more than
three seconds while the vehicle is in PARK (P).
•
It is necessary to maintain 120-volt APO operation
for loads greater than 1kw.
•
The hood is not fully closed.
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