Thanks for the reply. When the problem occurs, none of the lights are flashing. The last time the engine cut off, I took note of a few lights that were on (solid). These were the battery light, another that looks like an oil can, brake light (Because I turned on the parking brake), seatbelt light (I assume I took it off), and check oil light (mechanic forgets to reset). Nothing that seemed unusual. These lights may be on just because the key was in the "on" position. Gas and temp guage are working as normal. Tachometer and odometer at zero since the car is not moving. Power locks work fine. I don't use the keyless entry because my wife has the only one. I don't recall that ever having any issues either. Nothing particularly strange happening, except for the very first time it happened.
The first time it happened, it just wouldn't start. I methodically tried to narrow down the problem. Even though the battery seemed good, I tried to jump start from someone elses car. I didn't realize it, but the plastic covers on their battery terminals were swapped, and I didn't know that, and I burnt up the cables. Very embarassing. However, shortly after that, the car started up just fine. However, it was kinda shaky, and the transmission was shifting hard. A mechanic told me it might have gone into "limp mode" or something like that. The next time I drove, it was much better. There was a "check engine" light. I checked it at the auto part store and got 3 codes: P1780 (I believe the Park-Neutral Position switch) problem, P0300 (Random Multiple Engine Misfire detected), and P0727 - Engine Speed Input Circuit No Signal However, the check engine light has disappeared since then and never came on again since then. I have told some mechanics about these codes, but they didn't seem to think that they were relevant because the check engine light had gone off since then. I have heard that GM has a computer scanner that does a much more thorough job than the typical ODBII scanner. I haven't had one of those done yet. BTW, I appreciate your response, and I would love to get this fixed.
Wednesday, December 28th, 2011 AT 1:14 AM