2008 Tahoe. Over time have had several odd ball problems...running rough, hard shifting, check engine light. Had it in to dealer several times for tune up, motor mounts, finally throttle body replacement and hybrid battery replacement. All was well for about 10,000 miles, now I periodically get the warning chime with stabilitrak and brake system lights and messages saying to service all 3 systems. OnStar vehicle reporting does not indicate any problem with any vehicle systems. Also, cruise control no longer works (it powers on, but won't set). Some research suggested a brake light switch (attached to the brake pedal arm). I replaced that and everything worked for the day, then the next day cruise didn't work again and the warning lights were on (this is periodic by the way, not constant with the warning lights). I have also read that replacing battery cables can solve the problem. Has anyone had any success with these issues?