Hey my dash speakers are blown and I'm looking to do a swap. I have the 6 speaker (pre-infinity?) system. Is there an external amp? I've read the later Monty's and Sports have an external amp under the p/s side seat. But not in mine. Just trying to reuse factory stuff if it's up to the task of aftermarket speakers. Any experiences?

Also, recently going into 4H activates the Anti-Lock light, which stays on until I turn the truck off, regardless if I go back to 2H. Next start up it's gone. Any thoughts?