GMC 2010 T-Series, Owner'S Manual

Page: 68 / 294

Diesel Particulate Filter
The vehicle has a Diesel Particulate Filter (DPF) as part
of the exhaust system to reduce vehicle emissions. The
DPF requires a unique exhaust tailpipe with an exhaust
cooler. The exhaust cooler mixes air with the exhaust to
lower the temperature before it leaves the tailpipe.
The DPF, the tailpipe, or other exhaust system
components must not be altered. Inspect regularly and
clean any mud or dirt from the exhaust cooler,
especially where the exhaust cooler connects to the
tailpipe and the openings where fresh air enters the
cooler. See
“ Exhaust System Inspection ” under At Least
Twice a Year on page 6 ‑ 24 .
The DPF will clean itself as part of normal operation.
Several factors including fuel consumed, hours of
engine operation and miles driven are monitored by the
Engine Control Module (ECM). The self-cleaning occurs
approximately once per tank of fuel.
During cleaning, the
green DPF indicator light
will come on. See
Diesel
Particulate Filter Warning
Light on page 3
‑ 38 .
Extended idling can cause exhaust parts and gases to
become very hot. Keep the exhaust area clear of
material that could ignite or burn. See
Parking Over
Things That Burn on page 2 ‑ 27 for more information.
{
WARNING:
During DPF self cleaning or during extended idling
in P (Park), the exhaust system and exhaust
gases are very hot. Things that burn could touch
hot exhaust parts under the vehicle and ignite.
You or others could be burned. Do not park,
or idle for an extended period of time, near or over
papers, leaves, dry grass, or other things that can
burn. Keep the exhaust area clear of material that
could ignite or burn. See
Parking Over Things
That Burn on page 2 ‑ 27 for more information.
2-28