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toolboxchev · 10-12-2021, 10:42 PM

Is it when the heater is running?

The heater circuit runs through the ignition switch. If you have an AC heater fan which will draw 30 amps or so on high without the AC wiring and relay this could be the culprit.

GM did some funny stuff and now nobody supplies a 10 or 15 amp heater only fan. The parts houses just substitute the AC fan for heater only applications. Ask me how I know, I had to completely rebuild my stock wiring harness due to this, plus switches, plugs and all kinds of stuff.

10-12-2021, 10:42 PM	#12
toolboxchev Registered User Join Date: Jul 2015 Location: 2nd left past the stump on a dirt road. Posts: 2,629	Re: Ignition switch getting hot! Is it when the heater is running? The heater circuit runs through the ignition switch. If you have an AC heater fan which will draw 30 amps or so on high without the AC wiring and relay this could be the culprit. GM did some funny stuff and now nobody supplies a 10 or 15 amp heater only fan. The parts houses just substitute the AC fan for heater only applications. Ask me how I know, I had to completely rebuild my stock wiring harness due to this, plus switches, plugs and all kinds of stuff.