Is the block heater supposed to HUM? This is my first vehicle w/ a heater and when I plugged it in, it started humming. I don't want to blow anything up if this is not the way it is supposed to be.
1 - 1 of 5 Posts
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!