GMC 2006 Envoy Owner's Manual page 428

You may have an air inflator kit that is located in the
glove compartment. It includes a 22 ft (6.7 m) hose with
three nozzle adapters.
To use the accessory inflator, do the following:
1. Attach the appropriate nozzle adapter to the end of
the hose, if required.
CAUTION:
{
Inflating something too much can make it
explode, and you or others could be injured.
Be sure to read the inflator instructions, and
inflate any object only to its recommended
pressure.
2. Attach that end of the hose to the object you wish
to inflate.
3. Attach the other end of the hose to the outlet.
5-72
4. Press and release the switch to turn the air inflator
on. The indicator light will remain on when the
inflator is running.
The system has an internal clock to prevent the
system from overheating. The system will allow
about five minutes of running time, then the
compressor will stop. The indicator light will then
begin to flash. When the indicator is off, the inflator
can be started again by pressing the switch. If
the compressor is still hot, it may only run for a short
time before shutting off again.
5. Press and release the switch to turn the inflator off.
Place the inflator kit tools in the pouch and store it in
its proper location. Remove the inflator hose from
the outlet during loading and unloading. Load leveling
will not function with the inflator hose attached to
the inflator outlet. See Electronically Controlled Air
Suspension System on page 4-55 for more information.
To reinstall the cover, line up the tabs at the back of
the cover, put it in place and latch the tabs.
A continuous flashing indicator light may also indicate a
malfunction in the air suspension system. See
Electronically Controlled Air Suspension System on
page 4-55 for more information.