I am getting an intermitant "Service Active Handing Soon" warning message. Comes on and goes off randomly. My local dealer can find only an "ABS" Braking code stored in the computer and suggests that there may be a "faulty ground" in the ABS wheel sensors or elsewhere, but can not recommend a fix unless I am able to drive the vehicle to him when the warning signal is actually on. Apart from driving around the block next to the dealer for the next few months, any ideas where I might start, please?

Have you checked for codes yourself? It would help if you listed them if you could...

Have you checked for codes yourself? It would help if you listed them if you could...
totally agree, you can go to like Autozone and they will let you use one of their diagnostic computers to find out the codes and then you can go from there. Let us know if you do, and good luck!

The car's built in code reader should be able to tell me all I need to know actually... Do a search in here for reading codes, you should find my post on how to do it and all the codes listed.
:cheers:

I am getting an intermitant "Service Active Handing Soon" warning message. Comes on and goes off randomly. My local dealer can find only an "ABS" Braking code stored in the computer and suggests that there may be a "faulty ground" in the ABS wheel sensors or elsewhere, but can not recommend a fix unless I am able to drive the vehicle to him when the warning signal is actually on. Apart from driving around the block next to the dealer for the next few months, any ideas where I might start, please?


Some service people at dealers can be such block heads! You would expect they can just plug their little computer in and it will tell you what is wrong if anything?

Thanks for the help. The codes in the computer history are ABS-C1287 (Steering Sensor Rate Malfunction) (subcode 8731); U1160 (Loss of Communications with LDCM; and a right door module B2265 (Horizontal Position Sensor Fault) God only knows what this last suggests!
My dealer now tells me that, via GMC, he has been advised to replace the faulty Steering Sensor and that this will definitively fix the problem - at a cost to me of some $1,100! Seems to me as if GMC have heard of this problem before and are reluctant to issue a recall.

I am having the same problem, my vette mechanic suggested to get the car alignment done first,because the steering sensor is very sensitive by 1 degree. Then reset the computer. So far it is fine for me.

Let us know if the allignement works! That would be good info!