I'm am looking for an answer to this question as well. I was hoping one of our knowledgeable mechanics would know if the 1000W 6.7 plug part # BC3Z6A051A could be installed in the 6.2L block. The parts manual calls for part # BC3Z6A051C for the 6.2L engine. It is definitely a shorter heating element, rated at either 400w or 600w.

I am hoping to install the higher wattage heater in combination with a 500w oil pan heater but I am concerned about the threads matching and the fact that the 1000w heater for the 6.7L has a longer heating element. I was just hoping that someone who has worked on both the 6.2L and the 6.7L might have some insight.

 

I'm not sure why this is so pressing. The 6.2 doesn't need a block heater to start...the 6.7 rarely does.

The reason the gas heater is less output than the diesel is because the gas engine holds a whole lot less coolant.

 

No the 6.7, 1K heater will not fit where the 6.2 heater fits without modification. The 6.7 looks like it fits into a chamber which is part of the cooler sub-component, whereas the 6.2s fits/threads directly into the block. I haven’t gone any farther looking into how to modify things to allow the 6.7 heater to adapt to the 6.2. Not sure it can be done efficiently and successfully without sacrificing the longevity of the 1K heater.
troverman, its more of a convenience for us gassers than necessity as it is on a Diesel. It’s nice to hit the remote start and have almost instant heat especially when you live a very short distance from work and its 20*F to -10*F. Being an engineer for GM for years we test under cold weather conditions under real world as well as chamber testing. My working knowledge of what a gas engine does at -10, -20*F etc… contributes to the reason I favor a warm engine startups verses very cold ambient starts. So it’s a nice-to -have not necessarily a need. A warm engine will flash the converters faster allowing said engine to come down to idle faster. This reduces cold start wear and improves mileage, abate minimally but measurable. I simply don’t like a 0*F engine cranking then going directly to 1500RPMs. It’s much easier on everything when it’s warm.
There is several optional heaters from various manufacturers that can be installed on a 6.2, or any other IC engine, to achieve 1 to 1.5 KW worth of thermostatically controlled jacket water heat from one unit. Nothing in OEM exist to my knowledge. Look into the KIM HotStart line of block heaters. I’ve used KIM on standby diesel, natural gas, LP and gasoline gen-sets where instant start to 1800RPMs with full load is required. KIM is OEM to a many gen-set manufacturers. There is two and possibly three types to choose from for automotive applications. The vertical tank style which needs good thermal convection routing to work and the one which grafts into the lower radiator hose. Most any style heater should work provided it’s installed at the lowest point possible in the cooling system (to allow thermal convection).