Any ideas what to look at on this one????

Ensuring the wheel bearing sensors are clean and the contacts are not corroded are easy things to look at.

I have had "service stability systems" come up about 10 times over the past 4 years. Mainly showed up first thing in the morning, after the Bonneville sat outside all night. It went away after I drove a few minutes and shut the Bonneville off.

I haven't had the "service stability systems" come up in over a year.I never did anything to fix it. Never had any safety or reliability concerns when the light came on.

Please tell us more about what is happening with your Bonneville, is the light always on, intermittent, weather related, etc.

The best advice I can give you is to have the car scanned for diagnostic trouble codes. Most scanners are not capable of reading the codes you need to access, so you will need to go where they have a scanner capable of reading chassis and ABS codes. The dealership can certainly do this, but I find most transmission shops have scanners that will read these codes (and they are much cheaper). There are a number of sensors that can cause this issue, including the wheel speed sensors in each wheel (this is by far the most common problem), a break in a wire going to a wheel speed sensor, steering wheel position sensor, yaw sensor and the electronic brake control module. The point is, you can spend a lot of money replacing parts people tell you will fix the problem only to find the problem is still there. A little money invested in a scan will put you on the right track. If you do get a scan, post the results here and we will tell you what needs to be done.

It'* the first time it has come on and no other problems what so ever. I have had the bonne for over a year, other the the bearing nothing wrong.

I scanned my bonne the other day and got these codes c1221 1225 1232 1233 1236 1245 1248 and 1283. I've replaced my hubs several time...last was abt 6mths ago and it does this in winter and wet weather please help....

What do you mean "other than the bearing"? Did you recently replace a wheel bearing? Do have reason to believe you need to replace one?

1221 - LF wheel speed sensor input is 0
1225 - LF excessive wheel speed variation
1232 - LF wheel speed circuit open or shorted
1233 - RF wheel speed circuit open or shorted
1236 - low system supply voltage
1245 - right front ABS channel does not move
1248 - RF ABS motor free spins
1283 - excessive time to center steering

I am not familiar with some of these, but I would start by removing, cleaning, and reinstalling the wire connections at the RF and LF wheel speed sensors.

What model scanner are you using.

Remove completely or detach and clean...the wire attaches to the trans right..??

the thing that stands out for me is the low voltage code, the others could be caused by that. probably bad power or ground to whatever module controls the abs

The wheel speed sensors do not connect to the transmission, that is the road speed sensor. The WSS'* have a connection at each wheel to the hub/bearing assembly and the wires go to an large electrical connector at the electronic brake control module. The EBCM is located at the front driver side of the engine compartment and the connector is best accessed by rmoving the front left wheel and the front half of the plastic wheel liner.

The connectors I am talking about are at each wheel, just behind the rotors. They will be the only electrical connector in this area.