Review on 🧩 GM Genuine Parts 14047619: Ensuring Cruise Control Efficiency with the Vacuum Harness Check Valve by David Thomley

I have been using this exact model for over 10 years for special vacuum projects. It's bulletproof and true old-school quality. I've been buying these for years and unlike many other products they stay the same. Solid in every way. I use about 26 inches of mercury (inHg) and they last forever. Probably made in the USA. No Chinese junk, no matter where it is made. Good sharp spikes and a solid body. The two-tone is a nice touch to remind you that they're going from black to white.