General Motors Co. (NYSE:GM) stock soared 6% on Friday after Ford received a credit rating upgrade. This news sparked me to take another look into the technical of GM stock.General Motors (NYSE:GM) hit a low of $19.05 at the beginning of October and has been going up ever since. GM has been in a nice uptrend and has been bouncing off the 10 day moving average on every pullback. I would keep an eye on GM's 10 day moving average and if you see a close back below this level, sell.