i have an 02 tahoe z71 with a 5.3L. When it get hot my dash lights up like an x mass tree air bag light, abs, buckle seat belt, service 4X4 battery light, both fule and coolant cages go to 0 or all the way to the left. when it cools down is all fine. also the on star light goes red. i do have an alpine deck in it. any ideas?