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NEW! Technical Info: 4th Generation: NON DRIVETRAIN Technical discussion of fourth generation (2007.5 and up) 6.7L equipped trucks. Post your non drivetrain questions, solutions and upgrades here. DO NOT post drivetrain discussions in this section! For trucks with the 5.9L engine use the appropriate 3rd gen forums.
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Old 11-18-2009
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Question Low TIre Pressure Light

My light came on this morning on the way to work. It's not colder than it typically has been.
I stopped to check pressure,
front was 60psi
rear was 43-45

I added to the rear to 50.... light still hasn't gone off.

These numbers are a little higher than I'm used to.... 40psi all the way around
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Old 11-18-2009
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Whats the owners manual say? I typically run 55psi all the way around in mine.
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Old 11-18-2009
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Did you check the spare tire?
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Old 11-18-2009
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Didn't have time to check the manual this morning.
Is the spare on the system?
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Old 11-18-2009
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Yes the spare will have a sensor.
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Old 11-18-2009
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Am I the only person who runs their tires at 75~80psi ?
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Old 11-18-2009
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Well Mine are D-range so 60psi is max on them.
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Old 11-18-2009
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80psi is max pressure under a load, when empty, I typically keep mine at 40psi
Hugs the road better
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Old 11-18-2009
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The best ride for E rated tires on 3500 RAM SRW is 65PSI, and on the 2500 RAM is 60 in my case. When loded over the limit (like 4 tons of steel in the bed), then I go to 75 PSI.

With lower presuure, the handeling on corners not good, also with the lower pressure on E rated tires, the tire does not last as long.
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Old 11-20-2009
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Mine are at 70-75 psi
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