Cadillac CT4 2023 Owner's Manual page 364

Because of the way people use vehicles,
maintenance needs vary. There may need to
be more frequent checks and services. The
Additional Required Services - Normal are for
vehicles that:
Carry passengers and cargo within
recommended limits on the Tire and
Loading Information label. See Vehicle
Load Limits 0 197.
Are driven on reasonable road surfaces
within legal driving limits.
Use the recommended fuel. See
Recommended Fuel (LSY 2.0L L4 Turbo
Engine) 0 274 or
Recommended Fuel (L3B 2.7L L4 Turbo and
LF4 3.6L V6 Twin Turbo Engines) 0 275.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Normal Service.
The Additional Required Services - Severe are
for vehicles that are:
Mainly driven in heavy city traffic in hot
weather.
Mainly driven in hilly or mountainous
terrain.
Frequently towing a trailer.
Used for high speed or competitive
driving.
Used for taxi, police, or delivery service.
Refer to the information in the Maintenance
Schedule Additional Required Services -
Severe Service.
Warning
Performing maintenance work can be
dangerous and can cause serious injury.
Perform maintenance work only if the
required information, proper tools, and
equipment are available. If they are not,
see your dealer to have a trained
technician do the work. See Doing Your
Own Service Work 0 286.
Maintenance Schedule
Tire Rotation and Required Services
Every 12 000 km (7,500 mi)
Tires are rotated to achieve a more uniform
wear for all tires. The first rotation is the
most important.
Anytime unusual wear is noticed, rotate the
tires as soon as possible, check for proper
tire inflation pressure, and check for
damaged tires or wheels. If the unusual
wear continues after the rotation, check the
Service and Maintenance
wheel alignment. See When It Is Time for
New Tires 0 335 and
Wheel Replacement 0 339.
Perform Multi-Point Vehicle Inspection.
See Multi-Point Vehicle Inspection (MPVI)
0 366.
Lubricate body components. See Exterior
Care 0 353.
Additional Required Services
Service
Every 12 000 km (7,500 mi)
Check engine oil level and oil
life percentage. If needed, change engine
oil and filter, and reset oil life system. Or
when the CHANGE ENGINE OIL SOON
message displays, have the engine oil and
filter changed within the next 1 000 km/
600 mi. If driven under the best
conditions, the engine oil life system may
not indicate the need for vehicle service
for up to a year. The engine oil and filter
must be changed at least once a year and
the oil life system must be reset. Your
trained dealer technician can perform this
work. If the engine oil life system is reset
accidentally, service the vehicle within
5 000 km/3,000 mi since the last service.
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Normal