For GMC CHEVROLET UPDATED DESIGN BLOWER RESISTOR REPLACES 4P1516 JA1639 BMR34
Interchange Part Number: RU-631, 20340, RU1321, MT1805, BMR34, JA1639. 4P1595, 2-BMR34, 15-80567, 53-69738, 4P1516, BR532. A malfunctioning or inoperative Blower Motor Resistor will cause a poor cabin cooling or heating condition.