WHILE DRIVING, THE VEHICLE AIR BAGS DEPLOYED WITHOUT IMPACT. *NLM THEN 20 FEET DOWN THE ROAD THE PASSENGER AIR BAG DEPLOYED, TEARING APART THE DASHBOARD AND WINDSHIELD. GM DIDN'T SEEM TO BE CONCERNED ABOUT WHAT HAPPENED AND THEIR INSPECTOR SUGGESTED THAT THERE WERE PINE NEEDLES ON THE WINDSHIELD THAT CAUSED WATER NOT TO FLOW PROPERLY. THE SERVICE DEALER FOUND THE PASSENGER SIDE FLOOR FULL OF WATER FROM FRONT TO BACK. THE SDM MODULE HAD CORROSION AND WATER DAMAGE WHICH POSSIBLY CAUSED THE AIR BAG DEPLOYMENT. *SCC *JB