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Mar 06, 2021 - 06:24 PM
I have 2013 Denali with an Advent AC and a defective ACTH11 Thermostat, 8 wires ( replacing) with an ACTH12 digital 4 wires. I am adding the recommended ACRG15 plenum. Nothing addresses the remaining un used 4 wires. HELP!! Thanks,Tom [
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