GM reporting Duramax Diesel powertrain issues caused by aftermarket software; non-GM software voids powertrain warranties
Green Car Congress
AUGUST 19, 2012
The bulletin also extends the procedures to cover many Duramax-equipped vehicles built for model year 2013. GM reports an “increasing number” of engine, transmission, diesel oxidation catalyst, and exhaust particulate filter failures in vehicles that have been retrofitted with non-GM engine and/or transmission software calibrations.
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