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  1. #1
    Jr. Apprentice
    Join Date
    Dec 2009
    Location
    Elgin, Illinois
    Posts
    14

    Default Replacing Coolant 06 Sierra 5.3L Engine Block Drain Plug?

    I plan to drain/replace my coolant soon. I do not want to do a coolant "flush".

    My question is where, specifically, are the "engine block drain plugs"? Does anyone have good photos? I have the Haynes and the photo (p. 1-24) is so tight and doesn't provide an adequate description of location (for me). I need, at least, a reference to the locations of these two plugs (e.g., front side of oil filter...or something like that).

    Thank you for any help on this.

    Weekend Wrench
    Elgin, Illinois

  2. #2
    Sr. Engineer
    Join Date
    Dec 2011
    Location
    11-22-boogie woogie avenue
    Posts
    308

    Default

    Will have two plugs at /around oil filter ..will be the bigger one. Takes a 17mm hex head. Now the passenger side is smaller above the starter.

  3. #3
    Jr. Apprentice
    Join Date
    Dec 2009
    Location
    Elgin, Illinois
    Posts
    14

    Default

    Thanks Mr. Dipstick. I found similar info on other sites after a bit of googling. Most people recommend a flush (with the t connector). I haven't done a flush or drain (in my brief tenure), but since I already bought the 50/50 Dexcool, I am going to attempt the drain this weekend. I plan to only drain the driver's side block plug as the passenger side is apparrently blocked by the starter. Interestingly, my radiator drain hose is missing. I plan to use full goggles for this job. Any further hints/things to watch out for appreciated very much.Weekend Wrench06 Sierra 4wd 5.3L 4 door 135,000 miles

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