GM Parts 42390992 Horn sold2026 87139-52040

87139-52040

10dB Insulators: PTFE VSWR: ≤1

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always on after connection) and relay status indicator

Turbo Boost/Vacuum Gauge Meters race proven mechanical instruments provide trusted accuracy while being simple to install and direct replacement

GM Parts 42390992 Horn sold2026 87139-52040GM Parts 42390992 Horn GM Genuine Parts Horns are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). Product Features Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)