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-   -   2001 gmc 8.1 ECM upgrade question (https://classracer.com/classforum/showthread.php?t=80843)

Monte Howard 11-11-2021 08:14 AM

2001 gmc 8.1 ECM upgrade question
 
I have a 2001 GMC 2500 HD, the ECM isnít sending a pulse signal to the #4 injector. So I need to purchase a new ECM I am assuming. Anyone have experience upgrading the ECM on these 8.1 chevys for more performance for towing?


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