GMC LYRIQ 2023 Owner's Manual page 366

Cleaning Underhood
Components
Caution
Do not power wash any
component under the hood
that has this symbol.
This could cause damage
that would not be covered
by the vehicle warranty.
Solvents or aggressive
cleaners may harm underhood
components. Avoid using
these chemicals. Water is
recommended.
A pressure washer may be
used, but use care when
handling. The following criteria
must be followed:
Water pressure must be
kept below 14,000 KPa
(2,000 PSI).
Water temperature must be
below 80 °C (180 °F).
Spray nozzle with a
40 degree wide angle spray
pattern or wider must
be used.
Nozzle must be kept at least
30 cm (1 ft) away from all
surfaces.
Finish Care
Application of aftermarket
clearcoat sealant/wax
materials is not recommended.
If painted surfaces are
damaged, see your dealer to
have the damage assessed
and repaired. Foreign
materials such as calcium
chloride and other salts, ice
melting agents, road oil and
tar, tree sap, bird droppings,
chemicals from industrial
chimneys, etc., can damage
the vehicle's finish if they
remain on painted surfaces.
Wash the vehicle as soon as
possible. If necessary, use
non-abrasive cleaners that are
marked safe for painted
surfaces to remove foreign
matter.
Vehicle Care
Occasional hand waxing or
mild polishing should be done
to remove residue from the
paint finish. See your dealer
for approved cleaning
products.
Do not apply waxes or
polishes to uncoated plastic,
vinyl, rubber, decals, simulated
wood, or flat paint as damage
can occur.
Caution
Machine compounding or
aggressive polishing on a
basecoat/clearcoat paint
finish may damage it. Use
only non-abrasive waxes and
polishes that are made for a
basecoat/clearcoat paint
finish on the vehicle.
To keep the paint finish
looking new, keep the vehicle
garaged or covered whenever
possible.
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