GMC Hummer H3 2008 Owner's Handbook Manual page 37

Instrumentation and Controls
NOTICE
(Continued)
Modifications made to the
engine, transmission, exhaust,
intake or fuel system of your
vehicle or the replacement of
the original tyres with other
than those of the same Tyre
Performance Criteria can affect
your vehicle's emission controls
and may cause this light to
come on. Modifications to
these systems could lead to
costly repairs not covered by
your warranty.
See "Accessories and Modifica-
tions" for more information.
. . . 36
In order for your vehicle to pass an
inspection of its emission control
equipment, the Malfunction Indi-
cator Light must be working prop-
erly and must be off.
If you have recently replaced the
battery in your vehicle, or if the
battery has flattened, the vehicle's
on-board diagnostic system may
determine that the vehicle is not
ready for inspection. It may take
several days of routine driving in
order for the diagnostic system to
have enough data for the
inspection.
If the vehicle has been driven for
several days (with a fully charged
battery) prior to the inspection,
but the vehicle still does not pass
for lack of on-board diagnostic
system readiness, see your dealer
or a qualified service centre to
prepare the vehicle for inspection.