2005 GMC SIERRA 2500 Engine Problems

1). Dash light stays on constantly and reads SERVICE AIR BAG. This was checked out at an auto repair shop. If air bag doesn't respond, it could be fatal. 2). Check engine light is always on. Was checked out at an auto repair shop and repaired on 10/19/2021. 3). Right engine exhaust manifold is cracked and leaking exhaust. Was checked out at a muffler repair shop. In time I'm afraid fumes my leak into the truck cab. 4). A brake line ruptured and was repaired on 09/02/2020.

ALWAYS TURNS OFF WHILE DRIVING OR WHILE AT IDLE

2005 GMC 2500HD WITH 6.0 LITER GAS MOTOR. LEFT AND RIGHT BANK EXHAUST MANIFOLD TO ENGINE BOLTS BROKEN OFF IN HEAD. LEAKING EXHAUST FUMES AND CAUSING MY CHECK ENGINE LIGHT TO COME ON. GM NEED TO HAVE A RECALL ON THIS DUE TO THE NUMBER OF VEHICLES OUT THERE WITH THIS PROBLEM. THIS IS ALSO AN EMISSION PROBLEM DUE TO IT WILL CAUSE THE CAT CONVERTER TO OVERHEAT.. EPA? THANK YOU *TR

ALL EXHAUST MANIFOLD BOLTS ARE DEFECTIVE CAUSING THEM TO BREAK, WHEN THEY DO THE EXHAUST MANIFOLD SEPARATES FROM THE CYLINDER HEAD IN TURN DIRECTING ALL EMISSIONS FROM THE ENGINE INTO THE AIR, AND CABIN OF THE VEHICLE. THIS COULD CAUSE A FIRE IF NOT CORRECTED. ONE SPARK WOULD SET THE VEHICLE ON FIRE. *TR

EXHAUST MANIFOLD BOLTS ARE BREAKING OFF FOR NO APPARENT REASON. I HAVE FOUR BROKEN ALREADY AND AN EXHAUST LEAK DEVELOPING. THIS APPEARS TO BE A DEFECT IN MANUFACTURING. I HAVE A FRIEND WITH TWO OF THE SAME TRUCKS THAT THE SAME THING HAS HAPPENED TO. THERE ARE NUMEROUS COMPLAINTS POSTED ON THE WEB. I HAVE HAD MANY VEHICLES OVER THE YEARS AND WORKED THEM HARD BUT HAVE NEVER SEEN A BROKEN EXHAUST MANIFOLD BOLT ON ANY OF THEM. THIS CAN BE A DANGEROUS SITUATION AS HAVING EXHAUST LEAKS UNDER HOOD COULD CAUSE A FIRE. AS FAR AS I KNOW GM HAS NOT ISSUED A BULLETIN OR RECALL ON THIS BUT THERE SHOULD BE SOME REMEDIATION AS THIS IS AN EXPENSIVE REPAIR AND IT IS NOT A FAILURE CAUSED BY THE LACK OF MAINTENANCE. I HAVE ALSO HEARD REPORTS OF REPAIRED UNITS BREAKING AGAIN IN ABOUT THE SAME NUMBER OF MILES...