2002 CHEVROLET TRACKER Engine And Engine Cooling Problems

JUNE, 2004. AIR BAG LIGHT ON. DEALER INDICATES NEED TO REPLACE COIL/CLOCK SPRING. JULY, 2004, THE HORN WAS INOPERABLE AND THE AIRBAG LIGHT WAS ON. WIRES UNDER HORN PAD WERE "CUT." REPLACED SIR COIL AND REPAIRED HORN WIRE. APRIL 2005, AIR BAG LIGHT ON AGAIN. STEERING COLUMN LOOSE. REPLACED AIR BAG CLOCK ASSEMBLY. MARCH, 2008. AIR BAG LIGHT ON AND HORN BEEPING INTERMITTENTLY WHEN HITTING BUMPS OR POTHOLES. DEALER FOUND BROKEN WIRES FOR HORN CONTACT AND CLOCK SPRING. REPLACED COMPLETE STEERING COLUMN. FEBRUARY, 2011. AFTER THE DASHBOARD WAS TAKEN OUT TO HAVE HEATER COIL REPAIRED, MECHANIC INDICATED THAT AIR BAG CLOCK ASSEMBLY NEEDED WAS BROKEN AND NEEDED REPLACING. FOUR SIMILAR INCIDENTS BEGINNING IN 2004 UP TO PRESENT TIME. *TR

OUR CHEVY TRACKER WAS PURCHASED NEW IN OCT 02. THE FIRST TIME THE OIL WAS CHANGED THE VEHICLE WOULD NOT START BACK UP IMEDIATLY. AFTER SPINNING THE MOTOR OVER FOR SEVERAL MINUTES IT DID START BUT SMOKED SEVERLEY. THIS PROBLEM HAS PERSISTED SINCE THAT DATE. THE REPAIR TECH. AT CHEVROLET AGREES THAT THE VALVES IN THE CYLINDER HEAD ARE STICKING OPEN CAUSING THE VEHICLE TO NOT HAVE THE COMPRESSION TO START. BUT AFTER THREE ATTEMPTS TO REPAIR THEY HAVE FAILED AND CANNOT FIND THE PROBLEM WHAT DO I DO?????????????