Andy,

It was my understanding that the "stuck valve" that causes this loss of brakes and steering (vacuum loss), can only occur at start-up. This has been the case for me - only on start-up, never while driving. If you are experiencing this problem while the engine is running (it starts after driving the vehicle), I'd document this in a long letter to GM with your lawyer on copy. If this is your case, you need to start getting nasty with them and let them know that they will be liable for any and all damages that are caused by this problem. As much as I hate to be litigous, this is the only thing that seems to get big business' attention (liability to their bottom line).

If it is only happening at start-up, like mine, try having it towed in once more and demand they fix the problem. Intermittent problems are a bitch...


Good luck,

Phil B.