2019 GMC Sierra 2500 Exterior Lighting

The sockets in the rear brake lights had excessive corrosion and was causing the terminals on the bulbs to deteriorate. The lights were malfunctioning in all situations from braking, turn indicator and running lights. I was notified by the system that there was a problem. After trying to resolve the problem and replacing the bulbs the condition only worsened. I was then pulled over by law enforcement that told me I had nearly no rear lights at night. After banging the plastic light frames I was able to make it home. I brought my truck into the dealer who inspected and found faulty wiring from what I was told. I them paid to have both rear harness change and all the bulbs replaced to repair the condition. After review of the repair the dealer made no additional precautions to ensure that this condition would not return by placing any type of waterproofing dielectric grease in the sockets or connectors. So was this faulty wiring or simply a known defect. The dealer had them in stock which was surprising since I figure they would need to be ordered.

WHEN SHUTTING MY DOOR AND ESPECIALLY MOVING AND HITTING VERY LIGHT BUMPS IN THE ROAD AT ALL SPEEDS THE HEADLIGHTS SHAKE ON MY TRUCK . I HAVE THE HID HEADLIGHTS AND IT IS VERY DISTRACTING TO ME AND PROBABLY TO OTHER DRIVERS . I ONLY HAVE 500 MILES ONE MY TRUCK .