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Old 07-10-2015, 09:18 AM   #1
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Pick up truck tire pressure

I bought a 2015 GMC Denali HD, 3/4 ton, and the book calls for different air in the rear tires than in the front. Do people put more air in the rear tires for when they are towing? Or is this something that is done regularly. People I have asked said they run with the same air in front as in back no matter whether they are towing or not.


Larry W8PO & Lori N8IHJ
2014 Surveyor Cadet 265RLDS
2015 GMC Denali HD
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Old 07-10-2015, 09:24 AM   #2
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My 2013 Ram 2500 calls for 60 front,75 rear with heavy loads, light loads 60 frt/45 rear for a better ride, theres 2 settings for the tpms in the truck so it does not get an error when you change pressure.

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Old 07-10-2015, 09:26 AM   #3
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For what it's worth I run max cold pressure in the rear and just over recommended on the front but not quite max. My sticker states 65 front and 80 rear. I inflate the front to 70 it seems to ride better.
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Old 07-10-2015, 09:31 AM   #4
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My 2015 Chevy 3/4 calls for 60 ft 70 rear so that is what I keep them at. Later RJD
2015 35 FT V-Lite 30WRLIKS Diamond Package
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Old 07-10-2015, 01:49 PM   #5
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Our 2011 F250 Super Duty says to put 75 lbs in the steering and 80lbs in the rear. I do that religiously when towing the 5th wheel but carry 75 lbs all around without the 5th wheel. Works great for us.
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Old 07-10-2015, 02:27 PM   #6
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I keep both at max towing or not towing. Makes it quicker when I go to hook up- just a quick pressure check and I'm on my way vs. knowing that I need to put air in.
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Old 07-10-2015, 03:57 PM   #7
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It is best to have proper pressure for the load on the tire. If at maximum pressure with no real load then the tire will be high in the center. This will cause wear in the center faster than the outside. On some trucks that may not be that much different. I have on truck that if you run sidewall pressure the traction to start and stop is greatly reduced because tire surface touching the road is reduced. You can check this out at times when going through an area that is only slightly wet or dirty and you can tell that the tire is not flat. It is easy to inflate to max but it is not always the best thing you can do.
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Old 07-11-2015, 08:17 AM   #8
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I have a 2015 GMC 3/4 ton gas towing a 5er. Recommended pressure on the truck is 70 rear and 60 front. When I had it at the dealer and they rotated the tires they didn't reverse the pressure settings to conform to the recommended pressure fron and back. I filled tham to the recommended pressure before we left on this trip through Ontario and Michigan. I'll bet there is a fudge factor in pressures for the TV and the trailer but I try to run what is recommended.
Dan and Deb

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Old 07-11-2015, 08:33 AM   #9
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Oh heck that's almost expected every time I get my tires rotated, even at the Ford Dealer. For that reason and to always check my tires I carry an air compressor with me. It's a must have at all times.
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Old 07-11-2015, 01:50 PM   #10
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Best advice is what the Govt gives to their Special Agents. Run 5 lbs over the door post. For my 2007 GMC 2500HD 4x4, that's 70 front and 85 rear. When empty and wife complains I drop the rear to 60 or 70. Pull a 5r. Rear axle at max rating. Total vehicle and tow, loaded, about 22k #. All at max truck ratings, and no problems after 85K mi of towing.

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