THE GENERAL MOTORS SOLUTION
TO MEETING THE 2007 DIESEL
The 2007 Emissions Standards Challenge
Diesel Particulate Filter (DPF)
All diesel engines produced starting January 1, 2007 must
To reduce particulate matter, a Diesel Particulate Filter
comply with the new regulations that require the reduction
(DPF) captures soot and larger sulfate particles in a series of
of nitrogen oxide (NOx) and hydrocarbons (HC) by 50% and
ceramic honeycomb channels. Exhaust gases are directed
particulate matter (PM) by 90+% over the current 2004 emis-
into a cordierite or silicon carbide molded substrate with
sion standards. Further reductions of NOx, HC and PM will be
closed ends. Gas passes through the porous material, and
required by 2010.
the particulates are trapped and accumulate on the channel
Emissions must be reduced in all types of operation,
walls. As is used currently, an Oxidizing Catalyst will control
including stop-and-go situations. All diesel engine manufac-
turers will have to meet these stringent emissions standards,
resulting in additional hardware, software and ultimately,
Filter Assembly (Conceptual)
The GM Solution
Utilizing our worldwide resources and working with our
diesel engine partners, Isuzu Motors Ltd. and Caterpillar, GM
is proud to meet the upcoming 2007 Diesel Emissions Stan-
dards with technology solutions that fulfill our customers’
needs as well as the EPA’s new clean air requirements.
You can be confident that GM medium-duty trucks with
2007-compliant Duramax 6.6L and Isuzu 4H and 6H diesel
engines will deliver optimum performance at the lowest pos-
sible cost of ownership. In fact, some of our 2007 emissions
technology has already been proven in over 60,000 Isuzu
trucks operating successfully in Japan for the last two years!
2007 Emissions Requirements
Wall Flow Filter
To prevent the DPF from clogging, the trapped particulates
are burned off and the filter is cleaned using a high tempera-
ture (around 1000°F in the Particulate Filter) regeneration
process that leaves a harmless ash as a residue. There are
two types of regeneration: Self-regeneration, which is auto-
matic when the exhaust gases are high enough and Forced
regeneration, which is either automatic or manual. In most
Exhaust Gas Recirculation (EGR)
instances, the regeneration will be done automatically as the
To provide and maintain the best engine performance and
truck is driven throughout the day and requires no involve-
fuel economy while reducing the nitrogen oxide levels for
ment by the driver. However, if vehicle operation does not
the 2007 emissions requirements, our engines will use an
produce exhaust gases that are hot enough for automatic
advanced Exhaust Gas Recirculation (EGR) system and a
regeneration, a control light will indicate the need for regen-
variable geometry turbocharger. CAT C7 engines in C-Series
eration and the driver may initiate the process by activating a
trucks will use CAT’s ACERT systems.
switch on the dashboard.
Regeneration requires managing and controlling much
Gas Engines: A Viable Alternative
hotter exhaust gases than those experienced on current
Our gas engine alternative is part of a complete line-up that
diesel-powered vehicles. By utilizing dual-wall air gap pipes,
is unmatched in the industry. Gas engines provide a realistic
insulated catalysts and DPF filters, we are able to retain the
solution to lower mileage users who appreciate the availabil-
heat within the exhaust system. Consequently, pipe and
ity of fuel at every gas station. GM gas engines are also com-
component exterior skin temperatures are comparable during
patible with alternative fuels using after-market installations.
regeneration with existing gas engine exhaust systems.
No matter which solution you choose, you can be confident
Even though the DPF filter is designed for long life, eventu-
that your GMC or Chevy truck will offer the highest level of
ally the accumulated ash must be removed by special clean-
performance now and in the years to come.
ing equipment at truck dealerships.
To precisely control engine combustion and DPF regenera-
tion, we have developed system sensing and control soft-
ware. Extensive calibration changes have also been made.
Isuzu 4H Diesel
Closed Crankcase System
The 2007 regulations require that all diesel engine emis-
sions be reduced, including crankcase gas. As a result, we’ll
be adding a closed crankcase system that reroutes ventilation
gases back into the engine for combustion. Some systems
will have serviceable filters to collect residual crankcase oil.
Vortec 6.0L Gas
Special Fuels And Lubricants
The EPA has also lowered the limit for diesel fuel sulfur
from 500 ppm (parts per million) to 15 ppm for diesel engines
that meet the 2007 emissions standard. This new ultra-low-
sulfur fuel will be available beginning October 2006 and will
add 5¢ to 10¢ per gallon to fuel costs. New low-ash oil will
have to be utilized in order to extend the maintenance life of
the DPF filter. We have designed our emissions systems to
work efficiently with these new fuels and lubricants.
Isuzu 6H Diesel
GM Is Ready To Meet Your Needs
Working together, GM and its engine suppliers have thor-
oughly tested our emissions technology in the lab and in the
field under a wide variety of driving conditions and applica-
tions. Trucks utilizing our proven 2007 emissions technology
are operating now.
Our commitment to providing industry-leading technology
is your assurance we will continue to deliver products that
meet your trucking needs today –– and well into the future.
What You Can Do Now
GM offers alternatives that are available today for those
businesses wanting to avoid the extra costs and driver train-
Vortec 8.1L Gas
ing that will be required when buying or leasing trucks manu-
factured in 2007. Our current model line-up includes:
• W-Series trucks with 4H diesel and Vortec 6.0L gas engines
• T-Series trucks with 6H diesel engines
• C-Series trucks with Duramax 6.6L, Isuzu 6H, CAT C7
diesel and Vortec 8.1L gas engines
Duramax 6.6L Diesel
Isuzu 6H Diesel
CAT C7 Diesel
We have made this brochure as comprehensive and factual as possible. We reserve the right to make changes in price, color, materials, equipment, specification, models, and availability
at any time and without notice. Because some information may have been updated since the time of printing, please check with your dealer or Owner’s Manual for latest details.
© 2006 GM CORP.