I've run into a bit of a problem here with my 2000 SSEI Bonneville. I guess I will start from about 3 months back. About 3 months ago while driving I would notice the RPM gauge would drop to zero. Car was still running but the needle would be on zero and stay there. When I had a chance to stop the car and do a restart, it gauge would spring back to life as if nothing had happened. This problem is intermittent and happens at random times.
About 2 weeks ago while driving, the service engine soon light turned on. It stayed on for about 3 days or so then turned off on its own.
Also this time whenever the RPM dropped to zero, the car would jerk slightly even while in drive. But this would last for a split second and the needle drops to zero and the car is still running. ....till this morning.
This morning on my way to work, luckily before I hit the freeway, my car died on me as I was traveling at 75 km/h I was able to pull over safely and put the car in park. Turn the key back to the off position and was able to restart it right away. I noticed that when the car turned off, the battery light in the dashboard came on and the power steering was gone because the steering wheel had become heavy as I pulled over to the side of the road. I was able to drive to work with no more problems.
My car is a 2000 Bonneville SSEI supercharged with 96,000 km on it. I just replaced the battery about 18 months ago so I know that the battery is ok. Do you guys have any idea on what the problem might be? I'm planning to have a friend come over with his code reader to see what codes the car might have stored on the computer. Nevertheless I wanted to get some feedback from the knowledgeable folks here on this site. Thank you kindly for you help guys