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Old 04-06-2021, 10:10 PM   #1
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TV Tire Pressure

Hi - I have a 2018 Suburban Premier. Tires on the truck show max cold pressure of 44. Recommended tire pressure per Chevy is 35 (per the door sticker). When towing, is it advisable to go to the max cold on the tires? Seems like max cold pressure is required to achieve max load capacity on tires. Thanks
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Old 04-06-2021, 10:15 PM   #2
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What is the load on the tires?
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Old 04-07-2021, 05:04 AM   #3
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Originally Posted by Jason P M View Post
Hi - I have a 2018 Suburban Premier. Tires on the truck show max cold pressure of 44. Recommended tire pressure per Chevy is 35 (per the door sticker). When towing, is it advisable to go to the max cold on the tires? Seems like max cold pressure is required to achieve max load capacity on tires. Thanks
The load carrying capacity maxes out at 35 psi for SL Passenger car tires. You can go as high as the max pressure, but it isn't needed. However, some folks like the way more pressure feels.
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Old 04-07-2021, 05:46 AM   #4
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As noted above the Suburban is no longer a 'truck'.
When its time consider LT tires, a better option when loaded and towing.

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Old 04-07-2021, 06:22 AM   #5
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Going by a door sticker has no reflection what the actual tires are on any vehicle.Its a guideline.
Go with what's on the sidewall of the tires.Dont underinflate tires used for towing.Put Cold pressure in them.
Above info is good, about LT ( Light Truck) tires, on tow vehicles.
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Old 04-08-2021, 05:55 AM   #6
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........ Go with what's on the sidewall of the tires. .......
That's totally wrong. What's on the sidewall of a tire is a MAXIMUM, not a recommendation.

Imagine trying to inflate a tire to 80 psi, where the placard calls for 50 - it's that kind of wrong.
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Old 04-08-2021, 06:19 AM   #7
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So during my time at GM, I asked a tire and wheel engineer this very question.

1) The door sticker is not just a suggestion, guessing which tire is used. There is extensive testing done with the vehicle and the SPECIFIC tire used as OEM. That particular brand and model is assigned a TPC spec. It is essential, in order to maintain the outcomes predicted by the testing of the vehicle that replacement tires meet or exceed the OEM TPC.

2) I was told that the door placard pressures are assigned at full GVW for the vehicle, and there is no recommendation to run a higher pressure.....unless you are exceeding GAWR or GVWR. (And that is not a thing to do!!)

3) reducing pressure while travelling with an "empty" vehicle is at your discretion. I never do.
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Old 04-08-2021, 07:55 AM   #8
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Passenger car tires are full load rated at the door sticker. LT (Light Truck), besides being more durable, are load rated by pressure. The manufacturer will have a load rating vs pressure guide on their web site. There are also web sites that will give the equal pressure for a LT to reach an equivalent passenger tire load. I just went through this with my passenger (suv) tired Ram 1500 that Forest Service roads tore up last summer. I replaced them with same size LT running the pressure to get an equal load.
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Old 04-08-2021, 08:35 AM   #9
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My door sticker says 35 psi.
I've bumped it up to 44 for towing once and I've left it at 35 towing.
I couldn't tell any difference.
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Old 04-08-2021, 08:55 AM   #10
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Ditto what many are saying here. My F-150 Platinum door sticker says 35 psi, and that is for the full GVWR load. Going up to the tire sidewall maximum, 44 psi, isn't required for maximum load. On my previous F-150, it looked like I was getting excessive edge wear on the tires at 35 psi, so I started towing at 40 psi and that seems to make a difference.

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Old 04-08-2021, 09:10 AM   #11
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Quote:
Originally Posted by Mollysdad View Post
My door sticker says 35 psi.
I've bumped it up to 44 for towing once and I've left it at 35 towing.
I couldn't tell any difference.
Normal...
In my experience TP makes little difference in what YOU can tell, but the tire actually CAN tell, just doesn't speak our language.🥴

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Old 04-08-2021, 10:56 PM   #12
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Originally Posted by ROBERT CROSS View Post
^

X2



As noted above the Suburban is no longer a 'truck'.

When its time consider LT tires, a better option when loaded and towing.



Bob



Why is the Suburban no longer a “truck”? It is still built on a truck frame per GM. Also the Bridgestone OEM tires are light/medium duty truck tires. Thanks all for the feedback.
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Old 04-09-2021, 08:25 AM   #13
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Why is the Suburban no longer a “truck”? It is still built on a truck frame per GM. Also the Bridgestone OEM tires are light/medium duty truck tires. Thanks all for the feedback.
Because it's no longer equipped as a 'truck', they lowered the tow & GVWR rating,(our '06, 8600lb & 2690lb payload), comes with passenger car tires. smaller brakes, lighter axle ratings, smaller trans cooler, no trans temp gauge, lower ah generator.
Still a great errand, grocery getter and looks sooper. TETO

Bob
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Old 04-09-2021, 06:15 PM   #14
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Originally Posted by ROBERT CROSS View Post
Because it's no longer equipped as a 'truck', they lowered the tow & GVWR rating,(our '06, 8600lb & 2690lb payload), comes with passenger car tires. smaller brakes, lighter axle ratings, smaller trans cooler, no trans temp gauge, lower ah generator.

Still a great errand, grocery getter and looks sooper. TETO



Bob



Not sure which model you are comparing. Those 2006 numbers seem to be a 2500, particularly the payload. I am certainly not comparing a 2018 1500 to either a prior 2500 suburban or 2500 pick up, but my 2018 suburban 1500 actually does have an external trans cooler, trans temp gauge in the driver information center, light truck tires, heavier axle ratings than a 2006 1500 and massive disc brakes. The latest gen 2021 suburban takes it up a notch further with the 10 speed trans and straight 6 diesel. Again not comparing to a 2500. I do wish the 2018 offered a 4.10 rear, but the 2021 10 speed with a 3.23 should help.
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