To ensure reliability, purchase GM part # 20777073 Control Assembly, Heater & A/C (W/ Rear Window Defogger. It is sometimes referred to as GM A/C Switch, GM Blower Control Switches. Choosing OEM parts is the optimal decision for guaranteeing superior quality and perfect performance. These components undergo stringent quality checks and are carefully constructed to comply with GM's factory specifications, ensuring a smooth installation process.
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