Engine Block Heater Option?

[kars85]

I have an '03 EB that has a 3 prong male plug mounted in my grill. It looks too clean to be aftermarket, so I was wondering if this was a stock option?

I plugged it in for >15hrs, and there was no sign of it working as an engine block frost plug heater.

Does anyone know what this is?

 

[sor118]

Perhaps it is for the battery to keep it warm? Is your battery wrapped in some type of thermal jacket?

If I were you, I would jack up your truck and trace where the electric plug leads to.

 

[nascar_intimid]

I have one of those...never could tell if it was working..what kind of signs would you look for? I'm gonna ask the dealers

 

[kars85]

please, please let me know what the dealers say...

 

[kars85]

Had the front bumper off again today whilst installing tow hooks and low and behold the thing is disconnected. The 110volt ends about six inches behind the bumper with a 3 prong male harness. It disconnected from the female end, so all it took was a bit of electrical cleaner to eliminate the corrosion and a bit of force to connect the two back for good.

It worked at the time judging by the sizzle sound all frost plug block heaters make. I followed up last night be keeping it plugged in all evening and starting it up in the A.M. Temp gauge raised!

Kinda cool that this is a stock install. Nice feature to have in the -30F morning we sometimes get in Iowa.

 

[yooper]

I have the same thing on my 03 but never checked it out, figured my power bill is high enough lol, kinda thought it was a block heater of some sort. Thanks for confirming it for me.