1987 HEATER MODULE VIN PRODUCTION DIV OODE USAGE COL N0 03055105 12 B EXC HTR C46 A C 1 03058397 1 B W HTR C41 C46 2 03055104 1 3 G EXC A C 3 03055101 12 T EXC A C 4 1991 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17W jj 8 845 8 34 6 91