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2011 Chevrolet Municipal Vehicles Technical Manual
4 | sILvEraDo 2500hD crEw cab 4wD work truck - 1wt
POWERTRAIN
TRANSMISSION AXLE GVWR lbs (kg)
MYD MW7 Allison 1000
ENGINE
6-speed 6-speed auto. GT4 GT5
auto. with OD 3.73 4.10
STANDARD
CK20743 L96 Vortec 6.0L variable valve timing V8 SFI S — S A GEH 9,500 (4,309)
CK20943 L96 Vortec 6.0L variable valve timing V8 SFI S — S A CHM 9,900 (4,490)
OPTIONAL
LML/LGH Duramax 6.6L turbo diesel V8, B20-diesel
compatible (requires MW7 Allison 1000 6-speed — S S — C7A 10,000 (4,536)
automatic transmission; includes TUV heavy-duty
dual, 730 cca battery and K05 engine block heater)
S = Standard
A= Available
FE9 FEDERAL EMISSIONS. Use for ordering vehicles that will be registered in all states except California, Connecticut, Maine, Maryland,
Massachusetts, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington State
YF5 CALIFORNIA EMISSIONS. Use for ordering vehicles that will be registered in California.
NE1 CT/ME/MD/MA/NJ/NM/NY/OR/PA/RI/VT/WA EMISSIONS. Use for ordering vehicles that will be registered in Connecticut, Maine,
Maryland, Massachusetts, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont or Washington State
NB8 Required when option code FE9 “FEDERAL EMISSIONS” is ordered for delivery to a dealer located in California, Connecticut,
Massachusetts, Maryland, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island and Washington State for a
purchaser who will be registering the vehicle outside California, Connecticut, Maine, Maryland, Massachusetts, New Jersey, New
Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington State.
NC7 Required when option code YF5 “CALIFORNIA EMISSIONS” or option code NE1 "CT/ME/MD/MA/NJ/NM/NY/OR/PA/RI/VT/WA
EMISSIONS" is ordered for delivery to a dealer located in any state except California, Connecticut, Maine, Maryland, Massachusetts,
New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington for a purchaser who will be
registering the vehicle in one of these states or sold as permitted below under “EPA Policy on the Sale of California Emission Vehicles”
NB9 Required when option code YF5 is ordered for delivery to a dealer located in Connecticut, Maine, Maryland, Massachusetts, New
Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington. Required when option code NE1 is
ordered for delivery to a dealer located in California.
Requirements for Diesel Engines in Vehicles Over 14,000 lbs GVWR: Different requirements apply to vehicles weighing over 14,000 lbs GVWR
that are equipped with diesel engines. These requirements impact the Chevrolet Express and GMC Savana Vans weighing over 14,000 lbs
GVWR that are equipped with the 6.6-liter Duramax diesel engine (LMM). For these vehicles, a different set of states has adopted California
emission requirements, specifically, California, Connecticut, Delaware, Georgia, Maine, New Jersey, North Carolina and Pennsylvania. And GM
has established a different set of emission options for use by dealers as follows.
CEJ FEDERAL EMISSIONS. Use for ordering vehicles that will be registered in all states except California, Connecticut, Delaware, Georgia,
Maine, New Jersey, North Carolina and Pennsylvania.
YF5 CALIFORNIA EMISSIONS. Use for ordering vehicles that will be registered in California. Note: No 14,200 lb product offering available
except for models with option packages ANC, B3D, YF1, or YF2
CEI CT/DE/GA/ME/NJ/NC/PA EMISSIONS. Use for ordering vehicles that will be registered in Connecticut, Delaware, Georgia, Maine, New
Jersey, North Carolina and Pennsylvania. Note: No 14,200 lb product offering available except for models with option packages ANC,
B3D, YF1, or YF2.
GM has also established a different set of emission overrides as follows.
CEK Required when option code CEJ “FEDERAL EMISSIONS” is ordered by a dealer located in California, Connecticut, Delaware, Georgia,
New Jersey, North Carolina and Pennsylvania for a purchaser who will be registering the vehicle outside California, Connecticut,
Delaware, Georgia, Maine, New Jersey, North Carolina and Pennsylvania. Do not use for vehicles that will be registered in California,
Connecticut, Delaware, Georgia, Maine, New Jersey, North Carolina or Pennsylvania.
CEM Required when option code YF5 “CALIFORNIA EMISSIONS” or option code CEI “CT/DE/GA/ME/NJ/NC/PA EMISSIONS" is ordered by a
dealer located in any state except California, Connecticut, Delaware, Georgia, New Jersey, North Carolina and Pennsylvania.
EMISSIONS - MUST BE SPECIFIED