Almasp

Thanks for reply. I'm about to test my cable for continuity at room temp (it looks like its the non-thermostat cable though). If my thermostat is in the harness under the hood, is there anything to note before I snip it out? Or is that going to end up working exactly the same as cutting it out of a thermostat cable?

I was worried initially there was something wrong with my block heater, but upon further reading I see that GM restricts use to -18oC. If there's any reason I shouldn't activate my heater above -20, I'm all ears, but that seems a little ridiculous, and personally I'd rather pre-heat for a couple hours than idle in the driveway for 10 minutes. I paid for the heater after all. After some testing, it appears my system has the thermostat on-board rather than on the plug. No continuity at the element plug, and cord is 545324639, used for the diesels which have a heater tuned for temperatures much warmer than -18. Now, from what I can find, the heating element (12586687) doesn't look like it has the space for an thermostat. If the thermostat isn't in my cable, and isn't in the heating element, is it within the wiring harness (86827721) from plug-to-element? Or if it's not in there, where is it? How can I bypass the block heater thermostat??