The bearish stance taken by a whale investor, who has a significant amount of money to invest, indicates a potential negative short-term impact on GM's stock price. The fact that 60% of detected trades are bearish suggests that there is a higher probability of the stock price going down in the short term. Additionally, the targeted price range of $25 to $45 by whales over the last 3 months shows that there is significant interest in this price range, which could further impact the stock price.