Black plate (21,1)
Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
7576024) - 2015 - crc - 4/15/14
Driving and Operating
9-21
the time before the engine is
restarted to provide cabin
cooling. To maximize fuel
economy, use the eco air
conditioning mode.
.
The shift lever is in P (Park),
N (Neutral), R (Reverse),
or M (Manual Mode).
.
The high voltage battery pack
charge is low.
.
The hood is not fully closed.
.
Brake pedal pressure is low.
.
The malfunction indicator lamp
(MIL) is on; this may prevent an
auto stop.
.
High humidity is detected.
The Engine Will Restart When:
.
The brake pedal is released.
.
The accelerator pedal is applied.
.
Shifting out of D (Drive) to any
other gear.
.
The air conditioning or defrost
system need the compressor to
maintain vehicle comfort. See
Dual Automatic Climate Control
System on page 8-1
. The
warmer it is outside, the shorter
the time before the engine is
restarted to provide cabin
cooling. To maximize fuel
economy, use the eco air
conditioning mode.
.
The climate control system is
turned from off to normal air
conditioning or defrost. See
Dual
Automatic Climate Control
System on page 8-1
.
.
The engine is required to run for
either heater or climate control
performance. See
Dual
Automatic Climate Control
System on page 8-1
.
.
The high voltage battery pack
charge is low and requires
recharging.
.
Auto stop time is greater than
two minutes.
.
The hood is opened.
Engine Heater
The engine coolant heater,
if available, can help in cold weather
conditions at or below
−
18°C (0°F)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting the
vehicle. An internal thermostat in
the plug-end of the cord will prevent
engine coolant heater operation at
temperatures above
−
18°C (0°F).
To Use the Engine Coolant
Heater
1. Turn off the engine.