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Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .
Note that unlike a spark-ignited engine, which typically has less than 0.5% oxygen in the exhaust gas stream before the emission control device(s), diesel engines have a very high ratio of oxygen available. While the amount of available oxygen makes fast regeneration of a filter possible, it also contributes to runaway regeneration problems.
The Duramax V8 engine is a family of 6.6-liter diesel V8 engines produced by DMAX, a wholly owned subsidiary of General Motors in Moraine, Ohio.The Duramax block and heads are supplied from reliable vendors of General Motors.
This fluid had cold-weather performance problems, which led to the need for an improved fluid, the Type "A" fluid, in 1949. The Hydra-Matic drive fluid was only available at GM dealerships. As a result, regular SAE 20 engine oil was being used in its place at filling stations and repair garages.
General Motors Diesel Division (GMDD) was a marketing and customer service unit of General Motors founded in 1938. It sought customers for GM's diesel engines, which had undergone major development during the 1930s.
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Technical Service Bulletins (TSBs) are document recommended procedures for repairing vehicles issued by a vehicle manufacturer when there are several occurrences of an unanticipated problem. [1] TSBs can range from vehicle-specific to covering entire product lines and break down the specified repair into a step-by-step process.
The FICM (fuel injection control module) has been a problem, where low voltage in the vehicle's electrical system due to failing batteries or a low-output alternator can cause damage to the FICM. In addition, the placement of the FICM on top of the engine subjects it to varying and extreme temperatures and vibrations causing solder joints and ...