别克赛欧3 倒车灯开关 26677527 完美适配

When your Buick Sail CEEO 3 shifts into reverse, the reverse light does not light or lights intermittently, and the reverse radar or video system shows no response; this usually indicates worn or sticking internal contacts in the reverse light switch, preventing proper circuit completion. When functioning, this switch closes the circuit precisely when reversing to illuminate the reverse light and activate reverse assist. OEM number 26677527; perfectly suitable for Buick Excelle Classic 3 (2015-2018). Installation requires disconnecting the battery negative, removing the old switch, ensuring the installation hole is free of debris, and tightening to 15-20 Nm to avoid thread damage.