Recommended Fuel; Prohibited Fuels; Fuel Additives; Filling The Tank - GMC Chevrolet Express 2022 Owner's Manual

Recommended Fuel

Use the recommended fuel for proper
vehicle maintenance.
Use unleaded petrol with a posted octane
rating of 91 RON or higher and with ethanol
up to 10% by volume. 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.

Prohibited Fuels

Caution
Do not use fuels with any of the
following conditions; doing so may
damage the vehicle and void its
warranty:
Caution (Continued)
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 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.

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
(Continued)
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
Driving and Operating
engine fuel deposit free and performing
optimally. If you are unable to obtain
ACDelco Fuel System Treatment Plus -
Gasoline, consult your dealer for the GM
approved additive available in your country.

Filling the Tank

An arrow on the fuel gauge indicates which
side of the vehicle the fuel door is on. See
Fuel Gauge 0 71.
Warning
Fuel vapors and fuel fires burn violently
and can 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.
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