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Upfitter switches 2021 Silverado HD Gas

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I read almost every thread and still not sure about the part numbers. I get the color codes for the interior but is the whole kit the same as the 1500s? Chevy parts is joke. Next is the switches themselves are single wire. Do you need to add a relay if using AUX 1 for fog lights. Better yet anyone got a diagram how to wire to the switches. Thanks, Jason

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Google GM Upfitter #153 and #147 it will give you all of the directions needed, and I think it has part numbers too. The kit already has relay's built in. some are rated at 30 amp, and some are rated at 20 amp. I don't remember which switch number is rated for what amps off the top of my head. You would just hook the single wire off the switch to the positive side of whatever you are wiring up, and just hook the ground to a ground anywhere. You can also set each switch separately if you want it hot all the time, or keyed with the ignition. Switch 5 is prewired for the roof mounted strobe light, but if you don't plan on using that, or your truck doesn't have that option, you can cut the wire out of the harness, and use it for whatever you want. 

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