Fuel tank evaporator control valve
#2
If you are talking about the canister purge valve under the hood; no it does not come off, you just gently pry the fingers out while pulling the hose off. It kind of requires 3 hands where there is space for only 1 hand.
#3
Here is a thread that may help. Depending on which valve your replacing.
https://www.chevyhhr.net/forums/how-...acement-44780/
https://www.chevyhhr.net/forums/how-...acement-44780/
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