Fuel (Diesel); Fuel (Gasoline); E85 Or Flexfuel; Engine Oil Life System - GMC Sierra Limited 1500 2019 Owner's Manual

the tires to the recommended
pressure shown on the Tire and
Loading Information label. See
Vehicle Load Limits 0 242. The
warning light will remain on until the
tire pressure is corrected.
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
may be an early indicator that the
tire pressures are getting low and
the tires need to be inflated to the
proper pressure.
The TPMS does not replace normal
monthly tire maintenance. Maintain
the correct tire pressures.
See Tire Pressure Monitor System
0 384.
Tire Fill Alert (If Equipped)
This feature provides visual and
audible alerts outside the vehicle to
help when inflating an underinflated
tire to the recommended cold tire
pressure. See Tire Fill Alert (If
Equipped) under Tire Pressure
Monitor Operation 0 385.

Fuel (Diesel)

For diesel vehicles, do not use
gasoline. See Fuel for Diesel
Engines in the Duramax diesel
supplement.

Fuel (Gasoline)

Regular Unleaded Fuel
Use only Regular 87 octane
(R+M)/2 or higher unleaded
gasoline in your vehicle.
TOP TIER Detergent Gasoline is
recommended. Do not use gasoline
with an octane rating lower as it will
result in reduced performance and
lower fuel economy. See
Recommended Fuel 0 295.
In Brief

E85 or FlexFuel

FlexFuel Possible
Certain models are compatible with
E85 fuel. See E85 or FlexFuel
0 296.

Engine Oil Life System

The engine oil life system calculates
engine oil life based on vehicle use
and, on most vehicles, displays a
DIC message when it is necessary
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change.
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