Duramax Diesels Forum Truck of the Week
Old 06-25-2009, 12:47 PM
thelakerat thelakerat is offline
Join Date: Jun 2009
Posts: 10
Default TCM location

Ok so my dealership is saying that they need to replace the Trans control Module (TCM). Isn't the ECM and TCM the same controller on a LMM? I cant find a place to buy the TCM's but i can get the ECM's for half of what they want to sell me one for at ecuputlet.com.

Can someone straighten me out plz?
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Old 06-25-2009, 12:50 PM
MMLMM's Avatar
MMLMM MMLMM is offline

Join Date: Mar 2008
Location: Sin City, Nv.
Posts: 4,076


TCM is mounted on radiator/fan shroud in the front, next to drive battery. The ECM is just below it a bit by the battery. The TCM has a bunch of ribbed pins (cooling I guess) sticking out.

ECU has I think 2 LMM ECM in stock, As for LMM TCMs I have no source.

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Old 06-25-2009, 01:22 PM
thelakerat thelakerat is offline
Join Date: Jun 2009
Posts: 10

Thanks a bunch, at least now i know
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