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Re: blazer trans problem
The '93 does not need the computer to be programmed, its not vehicle specific in that regard. If it was replaced with a used unit, so long as it came from a 4.3 with matching drivetrain, it will work. As for a new refurbished ECM, all that is usually done is that the PROM gets transferred over to the new ECM and thats all there is needed, so long as the PROM was not damaged in any way. Also this is assuming though part numbers are the same and correct.
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