2003 G500 SRS Malfunction & Fuel Gauge Reading Incorrect
 

This truck has been unbelievably reliable for me over the years. Just recently, turning left into a space suddenly the SRS light and malfunction warning popped up. I also noticed today after filling that the gauge only reads about 3/4. Not sure if these are related. A little research shows that there may be a software update needed for this model to fix the gas gauge? What about the SRS situation? Any specific places to start (I don't currently have access to a STAR and I know I'll need one to clear the code once I fix whatever the malfunction is).