GMC 2.8L Duramax Diesel 2020 Manual page 66

Aftermarket Engine
Performance Enhancement
Products and Modifications
Some aftermarket engine
performance products and
modifications promise a way to
increase the horsepower and torque
levels of the vehicle's powertrain.
You should be aware that these
products could have harmful effects
on the performance and life of the
engine, exhaust emission system,
transmission, and drivetrain. The
engine, transmission, and drivetrain
have been designed and built to
offer industry leading durability and
performance in the most demanding
applications. Engine power
enhancement products may enable
the engine to operate at horsepower
and torque levels that could
damage, create failure, or reduce
the life of the engine, engine
emission system, transmission, and
drivetrain. Damage, failure,
or reduced life of the engine,
transmission, emission system,
drivetrain, or other vehicle
components caused by aftermarket
engine performance enhancement
products or modifications might not
be covered under the vehicle
warranty.
Vehicle Care 65