Zerostart 3100109 Engine Block Heater for Buick, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Saturn, Oldsmobile, 28mm Thread | CSA Approved | 120 Volts | 400 Watts

It is summer right now and I tried to see if it would start heating (after installing it) and was disappointed that it didn’t seem to work. So I did a continuity check on the electrical cord and one of the wires indicated open.I finally saw the tag on the cable that said it works only when it senses the ambient air temperature is less than 0 degrees F.So no problem. Just wish they would have put that info in

Did not function it was installed by a licensed auto mechanic and the first time it was plugged in it popped the breaker in the house and has not worked since! There is nothing major as far as electrical, like plugging in a lamp! So there is nothing that can be said about a mess up with the installation

fit the engine and works

When it came time to install (well after the return date) I found that I needed the one that fit into the machined hole in the block instead of the frost plug screw in version. I ened up buying the heater locally and used the cord that came with this unit.

Bolted right up to my 2010 gmc 2500 hd 6l

The installation instructions for 2016 Cadillac Escalade indicate that the install location is front left. Remove a lot of components and shields and find that the location is rear left. Seems like a small thing but on todays crowded engine compartments is wastes a lot of time.

Once installed works great!