Chevrolet/GMC 6.6L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-16504481) - 2023 - CRC - 9/26/22
Vehicle Care 45
Vehicle Care
General Information
Accessories and Modifications . . . . . . . . . . 45
Vehicle Checks
Engine Compartment Overview . . . . . . . . 46
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Engine Oil Life System . . . . . . . . . . . . . . . . . 49
Engine Air Filter Life System . . . . . . . . . . . 49
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . 50
Cooling System (Engine) . . . . . . . . . . . . . . . . 52
Cooling System (Low Temperature
Cooling Circuit) . . . . . . . . . . . . . . . . . . . . . . . 54
Engine Overheating . . . . . . . . . . . . . . . . . . . . 56
Engine Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Electrical System
Engine Compartment Fuse Block . . . . . . . . 58
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
General Information
Accessories and Modifications
Adding non-dealer accessories or making
modifications to the vehicle can affect
vehicle performance and safety, including
such things as airbags, braking, stability,
ride and handling, emissions systems,
aerodynamics, durability, Driver Assistance
Systems, and electronic systems like antilock
brakes, traction control, and stability control.
These accessories or modifications could
even cause malfunction or damage not
covered by the vehicle warranty.
Damage to vehicle components resulting
from modifications or the installation or use
of non-GM certified parts, including control
module or software modifications, is not
covered under the terms of the vehicle
warranty and may affect remaining
warranty coverage for affected parts.
GM Accessories are designed to complement
and function with other systems on the
vehicle. See your dealer to accessorize the
vehicle using genuine GM Accessories
installed by a dealer technician.
See the warranty manual.
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 engines,
transmissions, and drivetrains 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.
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