I have had a General Motors Mastercard for about 20 years. My interest rates have been average, and I have never defaulted on the card. Indeed I usually pay MORE than the minimum balance, paying in full when I can. Two months ago the company unilaterally cut my credit line in half. I didn't complain. However, this month the company increased the interest rate on the card to 30.99 percent! This is outrageous! Further, it falls on the heels of the government bailing out General Motors AND GMAC financing! I am filing complaints with all regulatory agencies I can find. read full review »