That's not a purchase move, it's an investment move. And considering they'll be the second largest share holder after GM, which only has 12%, isn't saying much either. And notice too that the stock purchase is by Mitsubishi Corporation, not Mitsubishi Motors. Nope, with Isuzu's stock having climbed up over 600% recently this is investment. Especially with Isuzu coming back to America soon and the intent to market their insanely popular Gemini line of cars. And as far as GM making Isuzu products, you can forget it. Isuzu started last year to officially kick GM out and sever all ties, so no worries on that front. Check out this thread for more info: Isuzu Corporate Info.