TECH­NI­CAL Q&A

AN­SWERS TO YOUR DIESEL QUES­TIONS

Diesel World - - Contents -

I’ve been talk­ing to an out of state ve­hi­cle bro­ker who has a 2010 Chevy LMM Duramax listed in in­ven­tory. He knows lit­tle about the diesels, but I would like to know whether or not the truck I’m see­ing ad­ver­tised is equipped with a DEF (Diesel Ex­haust Fluid) sys­tem. The bro­ker isn’t a lot of help be­cause the truck is ac­tu­ally in stor­age some dis­tance from his of­fice. I’m hop­ing you can pro­vide some in­sight. Wayne Con­ner Fort Wayne, IN Sources in­side DMAX told us that dur­ing the 2010 model year Chevy and GMC Duramax-equipped trucks sold through at least De­cem­ber 31, 2009, were equipped with es­sen­tially the same LMM Duramax 6600 as was avail­able for the 2009 model year—mean­ing no DEF. The cal­en­dar years and model years were some­what out of sync with re­gard to EPA emis­sions cer­ti­fi­ca­tion dur­ing that time pe­riod for a va­ri­ety of rea­sons (EPA saw a big change in lead­er­ship, GM fi­nan­cial, and so on). So at least the 2010 model y ear trucks pro­duced dur­ing the clos­ing months of cal­en­dar year 2009 did not get a DEF sys­tem. If your bro­ker’s ve­hi­cle in­ven­tory sheet in­cludes VIN num­bers, you can ver­ify whether the truck has a DEF sys­tem or not by look­ing at the 8th digit of the VIN. The LMM is linked to a VIN code of 6 (non-def), and the LML has a VIN code of 8 (W/DEF). Good luck.

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