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Underbody Maintenance
Chemicals used for ice and snow removal
and dust control can collect on the underbody.
If these are not removed, corrosion and rust can
develop on the underbody parts such as fuel
lines, frame, floor pan, fuel operated heater (FOH)
and exhaust system even though they have
corrosion protection.
At least every spring, flush these materials
from the underbody with plain water. Clean
any areas where mud and debris can collect.
Dirt packed in close areas of the frame should
be loosened before being flushed. Your dealer
or an underbody car washing system can do
this for you.
Chemical Paint Spotting
Some weather and atmospheric conditions can
create a chemical fallout. Airborne pollutants can
fall upon and attack painted surfaces on the
vehicle. This damage can take two forms: blotchy,
ring-shaped discolorations, and small, irregular
dark spots etched into the paint surface.
Although no defect in the paint job causes this, GM
will repair, at no charge to the owner, the surfaces
of new vehicles damaged by this fallout condition
within 12 months or 12,000 miles (20 000 km) of
purchase, whichever occurs first.
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