A PERSON RAN TWO STOP SIGNS AND ENTERED VEHICLE PATH. THE TWO VEHICLES HIT HEAD ON AND THIS VEHICLE MADE IMPACT AT 40 MPH AFTER IT DECELERATED FROM 43 MPH. THE TWO VEHICLE HIT HEAD ON WITH NEAR PERFECT EVEN IMPACT, BASED UPON THIRD PARTY VISUAL DESCRIPTION OF THE FRONT END OF THE VEHICLES DAMAGE. THE VEHICLE DECELERATED AT A MAX SDM RECORDED VELOCITY CHANGE RATE OF -14.07 (MPH) AND A ALGORITHM ENABLED TO MAXIMUM SDM RECORDED VELOCITY CHANGE OF 127.5 MSEC. DRIVER OF THE VEHICLE HIT THE STEERING WHEEL WITH HEAD KNOCKING THE PERSON OUT. AIRBAGS DID NOT DEPLOY. ONSTAR WAS NOT NOTIFIED THAT THERE WAS AN ACCIDENT. COMPUTER SHOWS THE SEATBELT WAS WORN BY DRIVER. WHEN THE ONSTAR WAS MANUALLY ACTIVATED BY THE DRIVER WHEN HE CAME TOO, THE GPS SHOWED THE VEHICLE FURTHER NORTH UP THE ROAD CAUSING INCORRECT POLICE DIVISION BEING CALLED. VEHICLE WAS GOING UP HILL WHEN THE ACCIDENT OCCURRED. OTHER VEHICLE WAS GOING DOWNHILL. THE OTHER VEHICLE WAS A SUBARU. VEHICLE COMPUTER DATA WAS RETRIEVED BY A BOSCH CRASH DATA RETRIEVAL TOOL USING VERSION 8.0 SOFTWARE. I HAVE A COPY OF THIS DATA. GM REPORTS THAT THE COMPUTER WAS CORRECT NOT TO DEPLOY AIRBAGS AND NOT CALL FOR HELP USING ONSTAR. THE VEHICLE HAD A SOFTWARE MODIFICATION DUE TO A FAULT WITH THE FAN SPEED CALIBRATION SETTING OFF A WARNING LIGHT. WE HAD COMPLAINED THAT THINGS WERE NEVER CORRECT AFTER THIS MODIFICATION OF THE SOFTWARE AND TOOK THE VEHICLE TO TWO DIFFERENT DEALERSHIPS COMPLAINING THAT COMPUTERS WERE DOING STRANGE THINGS AFTER THI