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Review on Zerostart 3100109 Engine Block Heater: Efficient Heating Solution for Optimal Engine Performance by Fred Novak

Revainrating 5 out of 5

This fits much better, plus a great integrated port cover

I used a Katz block heater on my 2011 GMC Canyon SLE V8 and it blew out after two months. It's much better, and the integrated socket cover is great. The Katz heater had to be purchased separately and was a terrible design. The connector that goes into the heating block also fits much better.

Pros
  • Replacement parts
Cons
  • There are cons