03 2500hd project

vipergtrdj

New member
May 7, 2016
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I am picking up a 03 2500HD. Its missing the 6.6, and transmission. My thoughts are to drop a 6BT p-pump cummins , 5spd manual trans in but my question is do I need to keep the ECU to control anything in terms of heater, ac, or anything ?
 

IOWA LLY

Yes, its really me
Feb 23, 2007
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Call Diesel Bros, Sell ecm, use money to buy ether.

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TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,322
1,608
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Mid Michigan
Sounds like blasphemy to me, but you do need to keep the BCM to run the electronics in the cab. How you're ever going to get it to work with the Cummins engine electronics, let alone figuring out how to get the cluster and all to work correctly, is the problem. Good luck.
 

Awenta

Active member
Sep 28, 2014
4,090
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CT
If you want a smokey gm truck just call longhorn

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