The more common truck TAC module was introduced in 2000 (GM# 19245406). This TAC module was used through 2002 with Gen III engines equipped with electronic throttle. General Motors used this TAC module with two different PCMs: GM# 09354896 in 1999-2000 and GM# 12200411 in 2001-2002. Truck TAC for 1-MB PCMs . With the 1-mb PCM came a new TAC ...