what is the square device behind the passenger side kick panel?
When I connect the battery, I get a strong spark and I hear what sounds like a relay energizing. The battery runs down without starting it for several days. I pulled all the fuses from the panel trying to locate the problem.
That looks like the ECU (computer)
The pcm should he under the hood unless they moved them in the later years. The transfer case module is there, is your blazer 4x4?
Yes, it is 4WD
Then it's your transfer case module.
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