Filling The Tank (Pickup Model) - GMC CHEVROLET Silverado 1500 2021 Owner's Manual

The only GM approved aftermarket additive
is ACDelco Fuel System Treatment
Plus-FlexFuel. Follow the instructions on the
bottle for proper use. This product is
available at your GM dealer.
Caution
Some additives are not compatible with
E85 or FlexFuel and can harm the
vehicle's fuel system. Use only additives
approved by GM for E85 or FlexFuel
vehicles. Damage caused by unapproved
additives would not be covered by the
vehicle warranty.
Caution
Do not use fuel containing methanol.
It can corrode metal parts in the fuel
system and also damage plastic and
rubber parts. That damage would not be
covered under the vehicle warranty.
To help keep the engine running efficiently,
fill the tank with gasoline, up to E15, after
filling the tank with E85 one or two times.

Filling the Tank (Pickup Model)

If the vehicle has a diesel engine, see the
Duramax diesel supplement.
An arrow on the fuel gauge indicates which
side of the vehicle the fuel door is on. See
Fuel Gauge 0 110.
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.
Do not re-enter the vehicle while
pumping fuel.
Driving and Operating
Warning (Continued)
Keep children away from the fuel
pump and never let children
pump fuel.
Before touching the fill nozzle, touch a
metallic object to discharge static
electricity from your body.
Fuel can spray out if the fill nozzle is
inserted too quickly. This spray can
happen if the tank is nearly full, and is
more likely in hot weather. Insert the
fill nozzle slowly and wait for any hiss
noise to stop before beginning to
flow fuel.
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