motojoeis01
New Member
my '03 gmc duramax threw the tcm malfunction code today when i tested out stacking my banks 6 gun on 6/6 and my diablo on extreme. very fast but dont suggest it. =P lots of power and about 35 psi of boost. anyways i beleive it threw the code due to transmission slip. i was at about 60 mph so i dont know what else would of caused it.