I just bought a 2003 SC vert because my 2001 SE vert is down with transmission trouble. The new convertible has issue starting. Sometimes it'll start sometimes when you turn the key don't do anything and other times it will crank and not start. I checked the pressure coming from the fuel pump and is exactly 40 PSI which as I understand is the correct pressure. When I was trying to start this car a couple of days ago after I bought it my friend was standing outside and he noticed that the flashers were flashing and I noticed that the OnStar button in the car went from red to Green. I've been able to read a couple other threads were people had chimed in with similar issues it wasn't the main theme of the thread. It seemed as though the answer for them was to disconnect the OnStar box because it was going bad. It was on a 9-5 not a 9-3 though. On the 95 the unit is in the trunk for the OnStar I'm wondering on a 2003 9-3 vert where the OnStar box is. Can I simply disconnect the box and fix the issue. If you cycle through the key fob on off on off eventually the car will usually start. When I bought the car there was a brand new ignition cassette in the engine and two brand new edition cassettes in the trunk. They had also ripped apart the dash where the sensor for the key fob is. so I knew they were having a starting issue that they were trying to figure out. I know the car has a brand new ignition cassette I would assume it has new plugs but I haven't looked yet. the car has a couple issues I believe it has a clogged catalytic converter it's throwing a code for map sensor or manifold pressure because of the clogged catalytic converter I believe it also has an ABS sensor issue the speedometer will come in and out when you're driving and of the brake light and ABS light will also come in and out intermittently. I have a Tech 2 coming in a few days so I was going to wait on the ABS issue till I could just scan the car. If anyone has had a problem with OnStar going bad and had to deal with this or if they know where it's located I would be very appreciative for the info.as always I'm greatful for the help.Thanks Ron R.