The Chevy Silverado may have a leak from the back windows for a couple of reasons. The most common is that the seal that goes around the window has started to wear away. This can happen over time due to general wear and tear. It does not mean the window is coming loose, but it does mean water can get in through the seams. You may also have a crack in the window, though this should be obvious. You can buy over-the-counter sealers that may work for a time but is best to take it into a shop and have them look into preparing the seal properly.
Ryan K
December 10, 2022
GM issues a technical bulletin, 18-NA-383, stating that if it is a sliding window, it will leak. The also describe the fix. About to call the dealer and get mine scheduled.
Gary A.
April 10, 2020
The rear window on a chevy silverado tents to leak when a seal door weather-stripping is broken.
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