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By gosh, I have had to use mine, even down here in sunny Southern Arizona. Though, not all night. I only plug it in when I get up in the morning.
IIRC the block heater is 750 watts like in my 06 so if my math is correct that's about 3 kWh for 4 hours of usage, I looked to see my current electricity cost it's $0.067 per kWh so 4 hours would cost about $0.28 so using it, it saves me $$$ not having to burn diesel to warm up the engine, by having an already warm engine I saw an increase in fuel mileage....Ditto what crash68 said. I consider whatever extra I pay on my power bill as an investment in the engine's longevity.
The new truck starts great in the cold down to about zero. I have not used the block heater at all. It has not be necessary.
If you have the cold weather package the end of the cord plug for the block heater IIRC should be located between license plate and tow hook on passenger side...I saw a block heater on my build sheet but I'm still procrastinating at locating the plug.
The battery hasn't impressed me with cold starts since I bought the truck in January 2022 and I can't imagine that warming up the block on cold days wouldn't be a smart idea.
I have a heavy-duty timer that I can program to energize 2-3 hours before my departure.
I'm retired and have just been too lazy to set that up.
Maybe, I'll dig out the timer and place it in a tripping hazard location, just see if I can get that done before the cold is gone for another 6 months.
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If you have the cold weather package the plug for the block heater IIRC should be located between license plate and tow hook on passenger side...
i prefer to remote start it and finish my coffee.sitting in a cold truck waiting for that tiny circle of windshield to defrost so you can creep down the road? hard pass.plus,i don't want to change my wiper blades 10 times a year from trying to clear ice with washer fluid.Or you can wait for oil pressure and some oil circulation and warm up the truck while it is moving.