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Black plate (18,1)
GMC Acadia/Acadia Denali Owner Manual - 2012
5-18
Instruments and Controls
This light comes on during a
malfunction in one of two ways:
Light Flashing:
A misfire condition
has been detected. A misfire
increases vehicle emissions and
could damage the emission control
system on the vehicle. Diagnosis
and service might be required.
To prevent more serious damage to
the vehicle:
.
Reduce vehicle speed.
.
Avoid hard accelerations.
.
Avoid steep uphill grades.
.
If towing a trailer, reduce the
amount of cargo being hauled as
soon as it is possible.
If the light continues to flash, stop
and park the vehicle. Turn the
vehicle off, wait at least 10 seconds,
and restart the engine. If the light is
still flashing, follow the previous
steps and see your dealer for
service as soon as possible.
Light On Steady:
An emission
control system malfunction has
been detected on the vehicle.
Diagnosis and service might be
required.
The following may correct an
emission system malfunction:
.
Check that the fuel cap is fully
installed. See
Filling the Tank on
page 9
‑
40
. The diagnostic
system can determine if the
fuel cap has been left off or
improperly installed. A loose or
missing fuel cap allows fuel to
evaporate into the atmosphere.
A few driving trips with the cap
properly installed should turn the
light off.
.
Check that good quality fuel is
used. Poor fuel quality causes
the engine not to run as
efficiently as designed and may
cause stalling after start-up,
stalling when the vehicle is
changed into gear, misfiring,
hesitation on acceleration,
or stumbling on acceleration.
These conditions might go away
once the engine is warmed up.
If one or more of these conditions
occurs, change the fuel brand used.
It will require at least one full tank of
the proper fuel to turn the light off.
See
Recommended Fuel on
page 9
‑
38
.
If none of the above have made
the light turn off, your dealer can
check the vehicle. The dealer
has the proper test equipment
and diagnostic tools to fix any
mechanical or electrical problems
that might have developed.
Summary of Contents for Acadia Denali 2012
Page 6: ...Black plate 6 1 GMC Acadia Acadia Denali Owner Manual 2012 vi Introduction 2 NOTES ...
Page 8: ...Black plate 2 1 GMC Acadia Acadia Denali Owner Manual 2012 1 2 In Brief Instrument Panel ...
Page 30: ...Black plate 24 1 GMC Acadia Acadia Denali Owner Manual 2012 1 24 In Brief 2 NOTES ...
Page 116: ...Black plate 6 1 GMC Acadia Acadia Denali Owner Manual 2012 4 6 Storage 2 NOTES ...
Page 240: ...Black plate 60 1 GMC Acadia Acadia Denali Owner Manual 2012 7 60 Infotainment System 2 NOTES ...
Page 254: ...Black plate 14 1 GMC Acadia Acadia Denali Owner Manual 2012 8 14 Climate Controls 2 NOTES ...
Page 399: ...Black plate 5 1 GMC Acadia Acadia Denali Owner Manual 2012 Service and Maintenance 11 5 ...
Page 401: ...Black plate 7 1 GMC Acadia Acadia Denali Owner Manual 2012 Service and Maintenance 11 7 ...
Page 416: ...Black plate 4 1 GMC Acadia Acadia Denali Owner Manual 2012 12 4 Technical Data 2 NOTES ...