Changed thermostat but can’t get coolant to bleeder

Duramax112345

New member
Apr 28, 2021
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Hey newbie lmm owner here I’m in the middle of a dpf delete and had a bad thermostat so I changed it out. But when I topped off the coolant it never came out of the bleeder bolt that I took off so I started it for a couple minutes hoping to get it to burp and noticed there was smoke coming out of the transmission dipstick I turned it off right away and am trying to figure out where I went wrong?