The OEM fogs on my 07 Silverado 2500HD did'nt work when I bought it, so I look underneath and both plugs were off the bulbs. No wonder. The bulbs are fine, however, the plug on the harness will not latch onto, and stay, on the notch of the bulb. Bought new bulbs because I though the notch wore down and the lock of the harness plug was not latching, but that is not the case. Still just pops off. I'm wondering if the harness plug itself is the culprit, but did'nt want to buy until i saw that others have experienced the same. Anyone else?