So I've wondered what the part in the image below is since I bought this suburban (95 k2500 with 7.4L and 4L80) in October. As far as I have chased the wires so far is into the black box in the second photo. The one part is mounted next to the trailer brake controller under the dash and the box is shoved in the wire harness. The dash mounted part appears to have a chip in it although I've no idea how to remove it.
Any ideas what they may be?
Any ideas what they may be?
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