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AUTO TRANSMISION AND CAR WASH MODE

Daniel Goss

Member
Joined
Aug 28, 2025
Messages
14
Location
East Texas
V-Series Cadillac(s)?
2025 CT5V Blackwing
In the Owners Manual for my 2025 5BW, on page 199, it says that the transmission is not designed to stay in Neutral for more than five minutes, and that it may automatically shift to Park. First, why would it be designed this way? Then on page 200 it describes how to put the car into Neutral for a car wash. I have never timed a drive thru car wash, but I would not want the car to suddenly shift into Park while going thru one. Has anyone ever just sat in a parking lot or driveway, with the engine running and transmission in Neutral, just to let five minutes time out so see what happens?
 
Not neutral but if you sit idle for long, it will shut down automatically without your input.
 
It's not a big deal. I've done it at the track in between sessions. You'll get a notice of an impending shutdown and you can defeat it extending your time easily and in a typical car wash you won't go into neutral until you go into the car wash so unless you're going into a mile long car wash it's not a concern.
 
Yeah I've left mine in neutral at the track for way longer than 5 minutes and it just gives you a warning message before doing anything - plenty of time to hit a button and reset it.
 
I highly doubt my 5BW will EVER go thru a mechanical car wash. But its good to know that these issues could arise. Like my cellphone, I don't know half the capabilities of these cars today. I was always happy with power steering, power windows, air conditioning and rear defrosters. When cruise control and electric 6 way seats came out , I was ecstatic ! LOL !
 

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