Wiring harness

Can anyone help me with the wiring harness diagram for Escalade ac? My pictures don’t show everything. I am replacing a Coleman Mach heat/cool thermostat. The harness coming from the fifth wheel has a bundle with red, green and white. The other harness has red, blue, green, yellow and white. I don’t think that the blue is used. The thermostat has
Green high fan
Gray low fan
Yellow compressor
Red pos
Blue neg
White heat
Any help will be appreciated. Thanks