GMC Chevrolet SSR 2003 Owner's Manual page 306

Notice: If the air compressor runs for more
than six minutes, at a time, it may overheat.
The excessive heat could damage the compressor.
Always operate the compressor for six minutes
or less when inflating a tire.
5-70
5. Inflate the tire to at
least 26 psi (179 kPa),
but not more than
36 psi (248 kPa).
Notice: If 26 psi (179 kPa) tire pressure cannot be
reached after six minutes the vehicle should not
be driven further. Damage to the tire is severe and
the sealant will not be effective. Remove the air
compressor plug from the accessory power outlet
and unscrew the inflating hose from the tire
valve. See "Roadside Assistance" in the Index.
7. If 26 psi (179 kPa) tire pressure is reached in
six minutes or less, disconnect the air compressor.
6. Inflate the tire for
up to a maximum
of six minutes.