http://special-reports.pickuptrucks.com/2010/02/2011-chevrolet-silverado-heavy-duty-first-look-part-2.html
here is a snip-it on the urea emissions controls
"The SCR system uses diesel exhaust fluid, or DEF. The urea-based solution (32.5 percent industrial urea and 67.5 percent deionized water) is held in a 5.3-gallon storage tank and injected as a fine mist into the Duramax’s hot exhaust gases. The heat turns the urea into ammonia that, when combined with a special catalytic converter, breaks down the nitrogen oxide emissions into harmless nitrogen gas and water vapor.
The 2010 Ram Heavy Duty 2500 and 3500 pickup trucks with the 6.7-liter Cummins I-6 diesel don't require DEF. They use a scrubbing solution called an adsorber catalyst that uses precious metals like a catalytic converter to eliminate the pollutant. However, the Ram 3500/4500/5500 commercial cab chassis trucks do use SCR, like GM and Ford.
The DEF refill point for the Silverado HD is mounted under the hood of the engine instead of next to the diesel refueling cap on the side of the cargo box, as it is on the 2011 Super Duty.
Arvan said DEF will need to be replenished about every 5,000 miles, depending on duty cycle. An electric heating element inside the tank will thaw the fluid if it freezes.
"We didn't want to make the DEF tank larger because DEF has a shelf life of only about 12 months," Arvan said.
To ensure that the driver refills the DEF tank, Duramax-equipped trucks will warn the driver when the fluid is down to a 1,000-mile range. A series of start-up warnings — including lights, chimes and messages — will become more frequent until the tank is empty. When the DEF fluid is down to a 100-mile range, the truck will be limited to only 55 mph. As the range declines, so will the vehicle's top speed. If the driver continues to operate the truck with a dry DEF tank, after a final warning and restart, the truck will operate in a “limp home” mode that limits speed to just 5 mph until the tank is refilled."
have fun with that. for some guys they will be putting in that crap once or twice a week. i doubt its cheap either.
here is a snip-it on the urea emissions controls
"The SCR system uses diesel exhaust fluid, or DEF. The urea-based solution (32.5 percent industrial urea and 67.5 percent deionized water) is held in a 5.3-gallon storage tank and injected as a fine mist into the Duramax’s hot exhaust gases. The heat turns the urea into ammonia that, when combined with a special catalytic converter, breaks down the nitrogen oxide emissions into harmless nitrogen gas and water vapor.
The 2010 Ram Heavy Duty 2500 and 3500 pickup trucks with the 6.7-liter Cummins I-6 diesel don't require DEF. They use a scrubbing solution called an adsorber catalyst that uses precious metals like a catalytic converter to eliminate the pollutant. However, the Ram 3500/4500/5500 commercial cab chassis trucks do use SCR, like GM and Ford.
The DEF refill point for the Silverado HD is mounted under the hood of the engine instead of next to the diesel refueling cap on the side of the cargo box, as it is on the 2011 Super Duty.
Arvan said DEF will need to be replenished about every 5,000 miles, depending on duty cycle. An electric heating element inside the tank will thaw the fluid if it freezes.
"We didn't want to make the DEF tank larger because DEF has a shelf life of only about 12 months," Arvan said.
To ensure that the driver refills the DEF tank, Duramax-equipped trucks will warn the driver when the fluid is down to a 1,000-mile range. A series of start-up warnings — including lights, chimes and messages — will become more frequent until the tank is empty. When the DEF fluid is down to a 100-mile range, the truck will be limited to only 55 mph. As the range declines, so will the vehicle's top speed. If the driver continues to operate the truck with a dry DEF tank, after a final warning and restart, the truck will operate in a “limp home” mode that limits speed to just 5 mph until the tank is refilled."
have fun with that. for some guys they will be putting in that crap once or twice a week. i doubt its cheap either.
