Will get an alarm for example a Clifford that has starter kill or ignition kill affect the ignition immobilizer that comes standard on 99 Maximas? What about fuel cut off?

 

Are you planning to integrate the two alarms? If so, the installer should be able to leave the factory immobolizer in tact, and add a second form of disable with the aftermarket alarm.
FYI I am leary of fuel and ignition cutoffs - just because I know electronics and alarms can fail. I'd hate to be making a close pass in front of a truck, or cutting across traffic to have my ignition cut out for some unforseen reason. Yikes!!!
Good luck...

 

I really don't know much about this sort of thing. I'd like to get a nice clifford alarm, for the security and for the keyless entry. I think those alarms come with some sort of starter kill, I just want to make sure that it won't affect the immobilizer in any way.