When cold outside, stalls when shifting to reverse after startup..
My Trailblazer, 2005, 6 cyl, 4.2, has a problem nobody has heard of or can fix With the cold weather, when I start up, wait a little, then shift into reverse, it stalls and the engine light blinks steadily. If it is warm out, it is fine. If I go into drive after starting up, it is fine. After driving around for a while and park, I can back up with no problem.Can anyone give me a clue so I can pass it on to my mechanic. This problem only occurs when it is cold out.