GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-MidEast-
11348267) - 2018 - crc - 6/27/17
208
Driving and Operating
.
Roads with poor lane markings,
such as two-lane roads.
If the LKA system is not functioning
properly when lane markings are
clearly visible, cleaning the
windshield may help.
A system unavailable message may
display if the camera is blocked.
The LKA system does not need
service.
LKA assistance and/or LDW alerts
may occur due to tar marks,
shadows, cracks in the road,
temporary or construction lane
markings, or other road
imperfections. This is normal system
operation; the vehicle does not need
service. Turn LKA off if these
conditions continue.
Fuel
Use the recommended fuel for
proper vehicle maintenance.
For the LYX 1.5L L4 engine, use
unleaded petrol with a posted
octane rating of 91 RON or higher,
otherwise an audible knocking noise
may be heard. If heavy knocking is
heard when using gasoline rated at
91 RON or higher, the engine needs
service.
For the LTG 2.0L L4 turbo engine,
use unleaded petrol with a posted
octane rating of 95 RON or higher.
Unleaded petrol rated at 91 RON
can be used, but acceleration and
fuel economy will be reduced, and
an audible knocking noise may be
heard. If this occurs, use petrol
rated at 95 RON as soon as
possible, otherwise the engine could
be damaged. If heavy knocking is
heard when using unleaded petrol
rated at 95 RON, the engine needs
service.
Caution
Do not use fuels with any of the
following conditions; doing so
may damage the vehicle and void
its warranty:
.
Fuel with any amount of
methanol, methylal, and
aniline. These fuels can
corrode metal fuel system
parts or damage plastic and
rubber parts.
.
Fuel containing metals such
as methylcyclopentadienyl
manganese tricarbonyl
(MMT), which can damage
the emissions control
system and spark plugs.
.
Fuel with a posted octane
rating of less than the
recommended fuel. Using
this fuel will lower fuel
economy and performance,
and may decrease the life of
the emissions catalyst.