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Re: 98 blazer
What kind of PCM did you get.
Rebuilt or new or used?
Rebuilt or new will usually will start but will need to be re programed for the car.
Does the fuel pump run?
Have you got spark to plugs?
Got injector pulse?
Rpm signal to the PCM.
Have you checked fuses and power feeds?
Any security lights on.
After market anti theft or remote start stuff on it?
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Remember proper testing gives us the answer to many problems.
MT
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