Grand Am Passlock problems w/ alarm

I installed a Viper 350XV (alarm with NO remote start) into a '99 Grand Am and a week later the customer called with Passlock issues.  On some occasions he's unable to start the vehicle, "security" flashes on the dash and the starter cranks but no fire.  On other occasions the vehicle starts and runs but "security" stays on on the dash.  Other times it starts and runs with no problems. 

The customer is certain the alarm is causing the trouble; I'm pretty certain it's not.  The ignition switch was replaced about 2 weeks before the alarm went in by the customer's mechanic friend.  I installed the alarm behind the glove box, and tapped locks, door pins and parking lights directly at the BCM under the glove box.  I pulled the ignition switch up into the instrument cluster cavity when I was making the ignition harness connections, but I don't remember straining any wires and of course I didn't tap or cut the passlock wires.  I tapped the constant power at the key switch, the green wire for the ignition input and interrupted the starter wire for starter kill.  I'm certain I didn't mix up the yellow starter and yellow passlock wires. 

I only have a passing familiarity with Passlock.  When the customer's girlfriend called the dealership's service dept she was told we probably mixed up some wires (thanks, guys).  She's taking the car to the dealer tomorrow but they're probably only going to hook it up to the code reader.   She'll be calling me back after she gets a diagnosis.  She's also convinced the alarm is the cause of the problem but she's less likely than the customer to scream and curse at me over the phone.

Can anyone who's more familiar with Passlock in these cars tell me how likely it is that I'm to blame for the problems, and what might be going on with the car?   Any questions I should ask the dealer's technician when I talk to him?

Doesn't matter to the dealer.........

Here is a little Info on PASS 2

http://www.wiringinstructions.com/238.htm

john right. there is a learn routine when replacing the cylnder.

xs

Look, tell the dealership to screw off. They know DAMN well they have a FACTORY issue with these ignition switches from passlock issues to mechanical workings of the switch. I had a grand am with no aftermarket installations done on it, the lock cylinder wouldn't turn at all. Thought i was gonna have to tow it in, but got a switch and replaced it. TWO WEEKS LATER, guess what? lock cylinder not working AGAIN! Put another one in and has been fine to this day. If I was you, I would replace switch myself and send the dealer that did it the first time a bill......

good luck my friend......give the dealer a big FU for me