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    New to forum…21 Sierra, Coolant Control Valve P1098 fixed

    Emailed…I had trouble the first try… main problem I think was large yellow valve seal(below the lock in the picture). The rubber seal got pinched funny when I put in in the first time and I believe was causing motor to think it hit the limit early or something.
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    New to forum…21 Sierra, Coolant Control Valve P1098 fixed

    I would make sure whatever grease you use is okay on all plastics.
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    New to forum…21 Sierra, Coolant Control Valve P1098 fixed

    First, only get into this if your warranty is expired. Take this stuff off: Tire, wheel well, steering linkage, air filter box, two frame brackets (to get air box out) Remove a lower coolant hose to drain most of it…this will be messy. I used a kiddie pool. Don’t unscrew to hose nipples from...
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    New to forum…21 Sierra, Coolant Control Valve P1098 fixed

    I think they didn’t test their new fancy valve enough before it was released. Way too complicated for what it needs to do.
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    New to forum…21 Sierra, Coolant Control Valve P1098 fixed

    If you mean fix without pulling the whole valve assembly out, no. The motor box in question rides the top of the valve and would be impossible to get to without removing the whole thing.
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    New to forum…21 Sierra, Coolant Control Valve P1098 fixed

    Hello folks, I successfully repaired my coolant control valve at home, no dealer fees, or WAITING for spare parts required…My 21 Sierra started throwing the P1098 code at 63k miles and blasting fans at 100% power. For a while I could restart the engine and it would go away, eventually that...
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