GMC 2011 Sierra Denali Owner's Manual page 442

10-98 Vehicle Care
Cleaners can contain solvents that
can become concentrated in the
vehicle's interior. Before using
cleaners, read and adhere to all
safety instructions on the label.
While cleaning the vehicle's interior,
maintain adequate ventilation by
opening the vehicle's doors and
windows.
Do not clean the interior using the
following cleaners or techniques:
Never use a knife or any other
sharp object to remove a soil
from any interior surface.
Never use a stiff brush. It can
cause damage to the vehicle's
interior surfaces.
Never apply heavy pressure or
rub aggressively with a cleaning
cloth. Use of heavy pressure can
damage the interior and does
not improve the effectiveness of
soil removal.
Use only mild, neutral pH soaps.
Avoid laundry detergents or
dishwashing soaps with
degreasers. Using too much
soap will leave a residue that
leaves streaks and attracts dirt.
For liquid cleaners, about
20 drops per 3.78 L (1 gal) of
water is a good guide.
Do not heavily saturate the
upholstery while cleaning.
Do not use organic solvents
such as naptha, alcohol, etc.
Damage to the vehicle's interior
may result.
Fabric/Carpet
Use a vacuum cleaner with a soft
brush attachment to remove dust
and loose dirt. A canister vacuum
with a beater bar in the nozzle may
only be used on floor carpet and
carpeted floor mats. For soils,
always try to remove them first with
plain water or club soda. Before
cleaning, gently remove as much of
the soil as possible using one of the
following techniques:
For liquids: gently blot the
remaining soil with a paper
towel. Allow the soil to absorb
into the paper towel until no
more can be removed.
For solid dry soils: remove as
much as possible and then
vacuum.