[heymccall]

Sounds like something is interfering with the databus wiring.
If you have a center console, you can look for the wiring rub in the link below.

Sparky's Answers - 2004 Chevrolet Tahoe Multiple Problems, No Communication

This 2004 Chevrolet Tahoe came in with a multitude of complaints. Some of the complaints were that it might not start, the power windows would stop working, the door locks would cycle, the radio would stop working, the instrument cluster gauges would stop working and multiple warning lights...

sparkys-answers.com

 

[heymccall]

As for the alarm/ remote start, pictures would go a long way toward interpreting what you have.