I called OnStar yesterday after I noticed the increased charge (from $12.95 to 18.95) The $12.95 was my "introductory price" which happened to expire last month and then jumped to the regular $16.95 + the apparent $2.00 increase, as was already mentioned. I told them I thought $18.95 for a service I've never really used was ridiculous.
The customer service rep then mentioned the pay up front option for a year @ $149...which also gets me 2 extra months for free.....thus coming out to $10.61 a month. So make sure they give ya the 2 free months if you sign up for it!!!
Of course, the customer service chicky went on to stress that at the end of the 14 month period the charges would increase to the regular amount (whatever it might be at that point). Mighty nice of her to give me the heads up on that I guess.
