GMC 2003 Sierra - Manual (Page 483)

Cheirìcals us&d ior ice and sndw removal and dusi
control can coiled ort Ihe yndorbody. If Itiese are not
removed, accelerated corrosion (rust} can occur on
tho underbody parts such as fuel lines, irame, floor pan
and exhaust system even though they have corrosion
protection.
Al least avery sprlngi,, flush these materials Trom the
undarhody with plain water. Clean any areas where mud
and debris can oolfect. Dirt packed in close areas of
the frame should be roosened before being flushed.
Your dealer or an underbody car washing system can
do Ihls for you.
Chemical Paint Spotting
Some weathgr and alimosphenc condì tmns can create a
chemical falloul. Airborne pollutants can falf upon and
allach pair^ted surfaces on your vehicle, This daimage
can take two Forms; blotchy, ringlel-shaped
discolorations, and small Irregular dark spots etched Into
the paint surface.
Although no defect in the pajnt job causes this, GM will
repair, at no charge to the owner, the surfaces of
new vehicles damaged by ihls fallout condition wilhin
12 months or 12,000 miles {20 000 km) of purchase,
whichever occurs first.
Underbody Maintenance GM Vehicle Care/Ap pea ranсe
Materials
See your GM dealer for mora information on purchasing
Ihe lol lowing productG.
GM Vehicle Care/Appearance Materials
Description Usage
Polishing Cloth
Waji-T reatsd Interior end exlerlor
polishing cloth.
Tar and Road Oil
Remover Removes Tar, road oil and
asphalL
Chrome Cleaner and
Polish Use on chrome or
stainless steel.
White Sidewall Tue
Cleaner Removes soil and black
marks from whitewalls.
Vinyl Cleanar
Ctaans vinyl lops,
Uphotstery and
convertible tops.
Glass Cleaner
Removes dirt, grime,
smoke and fingerprinls.
5’ioa