Chevrolet 2008 T Series Owner's Manual page 67

Your DPF equipped vehicle has specific fuel and engine
oil requirements. See What Fuel to Use on page 5-7
and Engine Oil on page 5-16 to make sure you use the
required fuel and engine oil.
CAUTION:
{
During DPF regeneration, the exhaust system
and exhaust gases are very hot. Things that
burn could touch hot exhaust parts under your
vehicle and ignite. You or others could be
burned. Do not park near or over papers, leaves,
dry grass, or other things that can burn.
When the yellow DPF indicator comes on, the filter is
dirty and DPF regeneration is necessary. When
driving continues without regeneration, the DPF indicator
will change from yellow to red. Continuing to drive the
vehicle with the red indicator can cause filter damage.
To clean the filter, either drive the vehicle above 30 mph
(50 km/h) to activate the automatic regeneration or
stop the vehicle and perform the manual regeneration
procedure. For the automatic regeneration, drive
until the green DPF indicator light goes off. This will
take approximately 20 minutes. Once automatic
regeneration has started, drive until the green indicator
light goes off to complete the regeneration in a single
operation if possible.
Notice: Extended idle should be avoided because
the DPF system is not capable of automatically
regenerating at idle. During extended idle, be sure to
watch for the DPF indicator lights which could come
on to indicate that the DPF is becoming full and
needs regeneration. If the yellow or red indicator light
comes on, perform manual regeneration or drive the
vehicle as described previously for automatic
regeneration to clean the filter. Continued engine
operation with the yellow or red DPF indicator light
on, without performing manual or automatic
regeneration, could cause irreversible damage to the
DPF requiring repair and possible replacement that
might not be covered by your warranty.
During regeneration,
the green DPF indicator
light will come on.
See Diesel Particulate
Filter Warning Light
on page 3-36.
2-29