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Thread: block heater

  1. #11
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
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    The easiest way to find if you have one would be to look at all your freeze plugs along both sides of the block. If it has a heater it would be installed in one of these. They are not all that big, but you should be able to see it & it will have a wire pigtail coming off of it.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  2. #12


    Near the cross-member that goes under the engine would be a good place to start.......

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  3. #13
    Sr. Apprentice
    Join Date
    Dec 2010
    25 Mi. E. of Kingman, AZ.


    I have an 03 2500hd D/A. The RPO codes on mine are V10= Cold climate provisions( might be the cold weather bra for the front end) & K05= Heater engine block. I think the cord is tied on the right side near the frame. This truck was purchased new in Menlo Park, Ca. I have never had to use the heater, but I did locate it shortly after I bought it.

    Hope this helps.

  4. #14
    Sr. Apprentice
    Join Date
    Mar 2009
    Kalispell, Montana


    I just did several of these in our fleet. The heater cord is zip tied up under the right side battery tray. There should be a big bundle of wires under the tray, they're all black and hard to see. There should be just enough cord to make it to the front grill if you run the cord right.

    Kalispell, MT
    Kalispell, MT :zzz:

    2004 Chevy Suburban-Bone Stock
    2006 Chvey Silverado 1500HD

  5. #15


    When I had my truck in for it's oil change I asked them to check and they found it on the Pass side of the block and brought it out next to the rad. Scott, thanks, when you say RIGHT side do you refer to it when sitting in the cab? I always thought when looking under the hood the RS was on the drivers side when standing in front of the truck.
    07 2500HD Duramax , 4DR and 26 Prowler 5th wheel Travel trailer, 57 Chev wagon with 14' Bonair travel trailer, and 71 Nova. Canadian Regional Coordinator

  6. #16


    Left and Right should always be referred to from the vantage point of sitting in the Drivers seat.... It reduces confusion that way...

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