2007 CHEVROLET AVALANCHE Engine And Engine Cooling Problems

EXHAUST MANIFOLD BOLT HEADS ARE BREAKING OFF CAUSING THERE TO BE AN EXHAUST LEAK. POLLUTION RECALL SHOULD BE INFORCED TO HAVE GM COVER ALL REPAIRS OF THE EXHAUST MANIFOLD BOLTS. CHECK ENGINE LIGHT COMES ON AND VEHICLE CAN NOT PASS EMISSIONS WITH THIS PROBLEM. *TR

TRAVELING AT A NORMAL RATE AND SPEED ON A 5-LANE HIGHWAY. VEHICLE LOSS POWER, ENGINE LIGHTS ACTIVATED. AFTER MANEUVERING THE VEHICLE OFF THE HIGHWAY, I SHUT THE ENGINE OFF. NO SIGNS OF SMOKE OR ANY LEAKS FROM ENGINE (TOPSIDE OR UNDERNEATH). I ATTEMPTED TO RESTART THE VEHICLE AND UPON DOING SO THE ENGINE TURNED OVER AND RAN AT A ROUGH IDLE, CLEARLY NOT ON ALL 8 CYLINDERS. I SHUT THE ENGINE OFF AGAIN. FROM THAT POINT ON IT WAS TOWED. THE CHEVROLET DEALERSHIP (AFTER 8 DAYS AND 449 MILES LATER) THEN TOLD ME THEY COULD NOT FIND A PROBLEM. WHEN THEY RECEIVED THE VEHICLE THE ORIGINAL CODES HAD BEEN TAKEN BY A PRECISION TUNE MECHANIC (NEAREST FACILITY FROM LOCATION OF BREAK DOWN) THE DEALERSHIP THEN INFORMED ME THEY COULD NOT DUPLICATE THE PROBLEM AND WAS APOLOGETIC FOR ANY INCONVENIENCE. I RECEIVED A BILL FOR $103.95 AND MY VEHICLE WHICH HAD...