what is the square device behind the passenger side kick panel?

Asked by Feb 09, 2016 at 07:26 AM about the 2004 Chevrolet Blazer

Question type: Maintenance & Repair

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.

4 Answers

75,595

That looks like the ECU (computer)

19,765

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

19,765

Then it's your transfer case module.

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