Im sure you can find an OEM one on ebay or craigslist for cheap if you keep your eyes open. Not sure if you travel far or just simply having issues warming up, but the block heater certainly works really well "instant" heat. When temps get below ~20ish I plug in my 2013 to make it easier on it. And as mentioned earlier, cord is wrapped up on passenger side. ALL Duramax equipped trucks have them.
On my 04 I had(LB7 just like your 03), I also added the high idle feature. Just a simple pin into the ECM and put power to it. You then just use your cruise control to turn it on and off(and increase or decrease idle). Just another option to help with warm up!
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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