GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18552429) - 2025
Driving and Operating 211
Caution (Continued)
•
Fo
r vehicles that are not FlexFuel,
fuel labeled greater than 15%
ethanol by volume, such as mid-level
ethanol blends (16–50% ethanol), E85,
or FlexFuel.
•
Fuel with any amount of methanol,
methylal, ferrocene, 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 aposted 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.
Fuels in Foreign Countries
Th
e U.S., Canada, and Mexico post fuel octane
ratings in anti-knock index (AKI). For fuel not to
use in aforeign country, see Prohibited Fuels
3210.
Fuel Additives
TOP TIER Detergent Gasoline is highly
recommended for use with your vehicle. If
your country does not have TOP TIER Detergent
Gasoline, add ACDelco Fuel System Treatment
Plus – Gasoline to the vehicle’s gasoline
fuel tank at every oil change or 15 000 km
(9,000 mi), whichever occurs first. TOP TIER
Detergent Gasoline and ACDelco Fuel System
Treatment Plus – Gasoline will help keep
your vehicle’s engine fuel deposit free and
performing optimally.
Filling the Tank
An arrow on the fuel gauge indicates which side
of the vehicle the fuel door is on. See Fuel Gauge
388.
{ Warning
F
uel vapors and fuel fires burn violently and
c
an cause injury or death.
Follow these guidelines to help avoid
injuries to you and others:
•
Read and follow all the instructions on
the fuel pump island.
•
Turn off the engine when refueling.
•
Keep sparks, flames, and smoking
materials away from fuel.
•
Do not leave the fuel pump unattended.
•
Avoid using electronic devices
while refueling.
•
Do not re-enter the vehicle while
pumping fuel.
•
Keep children away from the fuel pump
and never let children pump fuel.
•
Before touching the fill nozzle, touch
ametallic object to discharge static
electricity from your body.
(Continued)