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2019 Silverado LD block heater


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Do you really need a block heater?  For example, my '04 Sierra 3500 w 6.0L gas engine fired right up this morning, after the temp here went up to a balmy -32C (it was a lot colder overnight), without being plugged in, with a weak battery.

 

If anything, I would suggest, in order:

-battery heater

-oil pan heater

-then block heater.

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