I just got a "Customer Satisfaction Program" letter from GM stating that GM's 3.6 liter V6 (the engine used in the Camaro, Saturn Outlook, LaCrosse, Cadillac CTS, and several other cars) is showing premature wear of the timing chain. A quick check of the web turns up that many who own this engine are experiencing troubles all the way up to the engine fragging.
GM is offering to "change the calibration of the engine control module, including the engine oil life monitor, which in most cases will recommed more frequent oil changes".
Note that this language is intentionally vague, it only says that the changes include the oil life monitor, it doesn't say what other changes they will make. I'm concerned that they might, for example, reduce the max RPM, or they might reduce the peak HP. So I've now written to GM twice asking them to list all changes that they will make. So far, almost a month later, GM has not responded to either one of my letters.
Does anyone else know what other changes GM is making to the "calibration"?