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09-30-2020, 09:08 AM
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Registered User
 Join Date: Sep 2019
Location: Purcellville, VA
Posts: 102
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GM supermatic trans controller
Required when using a GM electronically controlled automatic transmission in these older trucks with carb motors. Includes wiring harness, software and connector for laptop. Controller allows full programming of shifting, as well as part-throttle, wide-open throttle and shift firmness control.
These are about $1400 after tax looking to get $1000 obo shipped for it. Brand new never installed only opened the box to look at it. More info https://www.gmperformancemotor.com/parts/19212657.html 
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