I noticed after a day or two of not driving and then starting the truck up with the A/C on I first get a whiff a bad smell for a few seconds. Then the air is normal. Anyone else experience this? What could be the issue?
Nope, highly unlikely unless your filter got wet. More likely that the cold evap coil is staying damp from condensation after you shut the truck off, then causes crud to grow in the warm, dark environment until you start the truck up again. Totally normal, can happen to any vehicle or AC system (including your home). Only way to prevent it is, as mentioned, run the fan manually without AC for a few minutes before you shut it down... which sucks and is totally inconvenient. Some cars are worse than others. The Tesla Model 3 was particuarly bad with this issue, but by the grace of Tesla's love to fix things with software updates, they programmed the fan to automatically run after exiting the car for a few minutes without AC to dry out the coils, thus preventing the problem.Trucks got 5,500 miles. Purchased in January 2020. Can The cabin air filter get dirty that quick? But yes it smells like feet straight out of the vents for a few seconds and clears up.
The only thing that I have noticed with my AC it smells "warm".
I noticed after a day or two of not driving and then starting the truck up with the A/C on I first get a whiff a bad smell for a few seconds. Then the air is normal. Anyone else experience this? What could be the issue?