So this winter has been rough on the Equinox, and it is taking it like a total wimp (would rather swear, but I can't).
It's a 2010 Chevy Equinox 3.0L AWD, built 09/09. On cold starts it hesitates and balks, then when it finally fires up there is a high pitched shriek coming from underneath the car that is accompanied by a low rattle. It goes away after a few minutes and then sounds normal. Its always had some hesitation in the cold since we first bought it, but now it has that horrible noise.
Driving it a few days ago, the check engine light flashed 5-6 times and then went away. Called OnStar, obviously no codes came up, but the adviser suggested it was a misfire. About two years ago around this time, fuel injector #6 was replaced under warranty, and the HP fuel pump was replaced (for the second or third time in several months).
The car has about 47K miles, and has had a history of problems with the injection system. I really want to get rid of it at this point.