Block Heater For 2003 Sliverado 5.3

cpaulsen0686 · January 12, 2011

I'm tring to figure out how to install and where to find a block heater for my 5.3. I'm under the impression that they went to screw in plugs. Does anyone know where I can find a screw in block heater or if Chevy dealers sell them.

MS3DALE · January 12, 2011

Its located on the drivers side of the block,above the oil filter,Its a brass 17mm hex head plug (although it may not look brass due to age/dirt)

Your dealer can get one,or NAPA also can get them.

jonny72888 · February 1, 2011

Did you ever do this install? I was thinking of doing the samething.

jonny72888 · February 1, 2011

I was thinking of using this...

http://napaautoparts.com/Search/Detail.asp...4014019+5999999

8.1HD/ALLISON · February 1, 2011

I put the factory one from the dealer in a few of my trucks. Think they were about $40. 400 watt elements. Use them all the time and love it.

reiling3 · February 2, 2011

Got mine from O'Reilly's. The socket to take the plug out cost me about as much as the heater itself. Works great though. -15 this morning, glad I had it. Easy install, I just wish they made the cords a bit longer.

jonny72888 · February 2, 2011

so does anyone know if the know if the GM ones turn on at 0*. I was looking for something that would stay on all the time or at 32*

txab · February 2, 2011

so does anyone know if the know if the GM ones turn on at 0*. I was looking for something that would stay on all the time or at 32*

The GM models kick in at 0 F and below unless you remove the built in thermostat

dewfpo · February 2, 2011

You can buy a regular (non-thermostatically controlled) block heater replacement cord/plug at NAPA to replace the OE one and it will be on any time the extension cord is energized.

DEWFPO