2008 GMC ENVOY Engine And Engine Cooling Problems

CHECK ENGINE LIGHT IS ON. ACCORDING TO TESTS IT IS THE RESULT OF A DEFECTIVE THROTTLE POSITION SENSOR. THE LIGHT WILL STAY ON FOR A COUPLE OF DAYS AND THEN GO OFF FOR A COUPLE OF DAYS CREATING A ERROR MESSAGE THAT SOMETHING IS WRONG WITH THE ENGINE. WITH IT GOING ON AND COMING OFF IT IS NOW DIFFICULT FOR ME TO GET MY INSPECTION COMPLETED WITH THE SENSOR READING NOT BEING ACCURATE. *TR

GMC USED CHEAP BOLTS ON THEIR V8 MOTOR'S EXHAUST MANIFOLDS. I HAVE TWO BROKEN BOLTS ON ONE SIDE AND 1 ON THE OTHER. CARR OF VANCOUVER GAVE ME A QUOTE OF $ 2374.00 PLUS TAX TO FIX THIS PROBLEM. THEY SAID IT WAS A WELL KNOWN PROBLEM WITH ALL OF THE V8 MOTORS BY GMC. I CONTACTED GMC AND THEY REFUSE TO DO ANYTHING ABOUT THIS. I HAVE RESEARCHED IT ON THE INTERNET AND THERE ARE HUNDREDS OF PEOPLE WHO HAVE HAD THIS SAME PROBLEM. THE QUESTION ISN'T IF THIS WILL HAPPEN TO ONE OF THEIR VEHICLES BUT WHEN IT WILL HAPPEN. IT IS SUCH A WIDE AND KNOWN PROBLEM A COMPANY HAS ACTUALLY MADE CAME OUT WITH A BRACKET TO FIX THIS PROBLEM. I DON'T FEEL THAT THIS SHOULD BE A CONSUMER PROBLEM BUT IT SHOULD BE A MANUFACTURER PROBLEM. I WOULD APPRECIATE ANY HELP. I FEEL THAT THEY...

THE VEHICLE REAR AIR COMPRESSOR AIR DEFLATES OVER NIGHT OR AFTER SITTING FOR A WHILE. AIR COMPRESSOR. *TR

I STARTED MY VEHICLE ON MONDAY MORNING AND IT WAS UNUSUALLY LOUD. AFTER INSPECTION, I FOUND MY MANIFOLD WAS CRACKED. *TR