(1) Re-manufactured unit not programmed.


Programming will be required when installing unit. 


If you need a plug N' drive unit with no programming required, please see our repair services


At check out must provide following information in order to complete processing.   


1.Year, Make, Model    


2.VIN (vehicle identification number)    


3.Part number   


4.Automatic or Manual, 2x4 or 4x4    




6.description problem or codes    




Auto Computer Specialist will begin processing your order immediately. Processing time takes 1 to 2 business days.




Once you receive the replacement unit, you will need to program it to your vehicle and you have 14 days to return the old unit (core) to activate the warranty and avoid the core charge. We send you a pre-paid label for return old unit (core).




Auto Computer Specialist uses the highest quality of OEM replacement parts & programming along with latest updates. All units go thorough testing point prior to shipping for quality assurance. ACS goals are to get you back on the road!!!




Have any questions? Call or Email us! 




Thanks for shopping with Auto Computer Specialist!

GMC Chevy Duramax Allison TCM TCU 6.6ltr or 8.1ltr