As to slow leakage:
Do you have a tire pressure monitoring system installed?
The kind that screw on the rubber valve stems are NOTORIOUS leakers.
At speed, the stems bend down to ride on the rim breaking the seal at the wheel. Steel or brass shanks (the 100 PSI type) do NOT bend and do not leak.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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