I'm writing for my Grandpa, so forgive me if I don't have all the info. Everytime he starts the truck, the cabin dings in a set of five time, five times in a row. The dash lights go out during this time also. He also thinks that it might have something to do with the passenger airbag, cuz he was having problems with that before. Thank you.

 

The series of "dings" indicate the SRS indicator bulb is burned out .......... and you have a fault in the SRS system that will be indicated by lamp flashes when you replace the bulb.