99 park ave security light

recently installed a remote starter on a 99 park ave and used a dei 555g to by pass the pk3 system.car starts fine every time with the remote starter however when the key is put into lock cylinder and turned ona few seconds later the security light comes on and stays on. when you start the car with the key the security light  acts normal (ie goes out). when the remote start starts the car the security light is not on. checked all connections everything seems right. the only discrepency i beleive their might be is the fact that there are two purple wires coming out of the pk3 module, i hooked into one of these per the 555g instructions and it is my understanding that either one will work.never tried to hook to the other untill i got some input as i dont want to just move connections around for no reason.

Any help is appreciated!

motorsportsman

i do remote starts for a gmc cadi dealers and i always use a 556u, i never have a problem and the key is easy to program

Thanks for the info everyone. I did make sure the jumper was correct and double checked the ground. I thought about using the 556u but the owner had just paid $34  for an extra key and they didn't want to have to buy another.However  I have recently heard reports of trouble with the 555g and other dei bypasses so in the future I think I'll use the 556u or equivalent.

Thanks

motorsportsman