Tire Pressure Question

[Raybikes]

Hi all.

I have the Chevy TBSS and stock tires. Was wondering what tire pressure to use. I looked on the drivers side door and it said 32psi for front and rear.

However, on the tire itself it says max psi 44. So, I went with what was on the door 32psi.

Also, the Tire Pressure Monitoring system is pretty cool too. It actually knows how much pressure is each tire. Thought thats was neat.

Thanks in advance for all the feedback...:)

[Fishhunter911]

I've been running mine around 36psi. Ride is good and a little bit better MPG.

[2002SLT]

I've been running mine around 36psi. Ride is good and a little bit better MPG.

:iagree: When I picked mine up from the dealer, they were all around 44psi. Rides much nicer around 36psi.

[blautens]

Hi all.

I have the Chevy TBSS and stock tires. Was wondering what tire pressure to use. I looked on the drivers side door and it said 32psi for front and rear.

However, on the tire itself it says max psi 44. So, I went with what was on the door 32psi.

Also, the Tire Pressure Monitoring system is pretty cool too. It actually knows how much pressure is each tire. Thought thats was neat.

Thanks in advance for all the feedback...:)

Tire pressure indicated on the tire itself is the maximum safe inflation pressure for the tire - not what's recommended for your vehicle. Rather you can always safely follow the the sticker on the inside of the driver's door, assuming everything is stock.

[vette3]

The tire pressure should be what's on the door frame, The tire's are used on other cars and they may have other pressure #'s than what the ss has. The dealer should have never put 44 lbs in your tires, that is just the max # before it is unsafe.

[2002SLT]

The dealer should have never put 44 lbs in your tires, that is just the max # before it is unsafe.

I was told that they are shipped with that much pressure. The dealer forgot to reduce them before putting it on the lot.

[Raybikes]

Hi All.

Thanks for replying to my question. I feel that I'll stick with the sticker on the door and go with the 32psi. My only worry is over and under inflation.

Also, wondering how long these tires will last? Goodyear say's 65k and I doubt that!

Raybikes

[2002SLT]

Also, wondering how long these tires will last? Goodyear say's 65k and I doubt that!

65k! :eek: Where did you see that? These tires are pretty soft. Tread Wear is only 260.

[ylab]

Hi All.
Also, wondering how long these tires will last? Goodyear say's 65k and I doubt that!

The only place you might get a Goodyear Eagle to last 65k is in fantasy land! :laugh: The GTII that came on my 20" rims orginally had a treadwear of 420 and 40% of the tread was gone after maybe 8,000 miles......not just the fronts, the fronts and backs so it wasn't an alignment issue. My guess would be you may get 20,000 miles or so out of them, provided the suspension tuning helps on the SS and you're not smoking them regularly.

[Raybikes]

65k! :eek: Where did you see that? These tires are pretty soft. Tread Wear is only 260.


I must have been in fantasy land and you are right that they are rated 260. I am not sure how many miles that will get me. I just hope that I don't have to replace them annually.

This being my first sports car/truck I don't know what to expect. I have a feeling that this vehicle in RWD will be terrible in the snow as well with these tires.

[GMtech45]

ANYONE that gets 65k on ANYTHING Goodyear makes should put it in a museum!!!! Figure on about 20k

[Prey521]

I have my stock tires @ 40PSI

[Fleet]

If these tires only last 20k, there's no point in rotating them. What tires are better for replacements?

[Hawkvoy]

I run mine at 38 and get around 18mpg.

[Trailblazer1]

for those of you who remember the ford explorer that seemed to always wind up on it's roof, part of the reason was ford recommending an artificially low tire pressure to get a decent ride. I have been running mine around 38 to 40 and so far have seen good even treadwear across the tires. gas mileage...forget about it

[ylab]

If these tires only last 20k, there's no point in rotating them. What tires are better for replacements?

There are a few good wearing 20" tires on the market, that are also cheaper and have better all-weather grip in addition to dry performance than the Goodyears. Cooper Discoverer H/T & H/T+ (Near identical tire sold under Mastercraft name), Kuhmo Ecstas are pretty popular, Falken STZ04, Yokahama (little pricey) and the Hankook Ventus ST to name a few.

I have the Hankooks on my Envoy, good tire in any weather and seems to wear really well......V rated with a treadwear is 420. Also includes road service for the first 25% or 50% of treadlife. (They run around $145 locally or $415 a set plus shipping off eBay). They're available in the stock SS size of 255/50/20 or Plus-0 sizing of 275/45/20.

[vetruck]

32 is way too low for this truck. Mine was around that for a couple days after leaving the dealer until I checked it. I took a turn at a mildly aggressive speed and felt the tires roll onto the sidewall. NOT GOOD! Now I'm running 37 all around and the ride is still good and the truck is much more stable.

[Dave]

RSAs lasted 60k on my 00 Grandprix GTP but they were pretty much junk. The SS is around 1300lbs heavier though.

I would use the pressure on the sticker. I wouldn't be surprised if GM denied a warranty claim with the suspension or something else if the pressure is way too high.

[vetruck]

Hmm, pay for new shocks out of my pocket, or risk a very serious accident:undecided ...., I'll keep mine where its at.

[Raybikes]

32 is way too low for this truck. Mine was around that for a couple days after leaving the dealer until I checked it. I took a turn at a mildly aggressive speed and felt the tires roll onto the sidewall. NOT GOOD! Now I'm running 37 all around and the ride is still good and the truck is much more stable.

That it said 32 on the inside right front door, for both fronts and rear. After a couple of highspeed runs 80-100, I checked the tire pressure monitor on the dic and they were 37psi.

I also noticed that the max pressure was 44 for the tire. So, if you inflated more than 32psi recommended pressure like 38psi the tire pressure will raise and then you could possibly be over the max. I'm no expert just a logical thought, I hope...

Raybikes SS:)

[Raybikes]

That it said 32 on the inside right front door, for both fronts and rear. After a couple of highspeed runs 80-100, I checked the tire pressure monitor on the dic and they were 37psi.

I also noticed that the max pressure was 44 for the tire. So, if you inflated more than 32psi recommended pressure like 38psi the tire pressure will raise and then you could possibly be over the max. I'm no expert just a logical thought, I hope.
Raybikes SS:)

Underinflated tires can lower your fuel economy by full miles per gallon. (Get the proper inflation pressure from the sticker on your car's doorjamb or the owner's manual, and not the tire's sidewall.)

[SSmokinTB]

That it said 32 on the inside right front door, for both fronts and rear. After a couple of highspeed runs 80-100, I checked the tire pressure monitor on the dic and they were 37psi.

I also noticed that the max pressure was 44 for the tire. So, if you inflated more than 32psi recommended pressure like 38psi the tire pressure will raise and then you could possibly be over the max. I'm no expert just a logical thought, I hope...

Raybikes SS:)Your logic is true, but there is a little more to it than just a linear rise in pressure. Read on if you care to hear my :m2:.

Raising the pressure in the tire (while cool) can lower the hysteresis of the tire at speed, thus lowering the temp and pressure after running the test. So if you raise the tire pressure to 35 and run the test, the tire deforms less at speed, and the pressure may only rise to 38. If you plan on driving for an extended period of time at highway speeds (or with a load), raising the tire pressure can actually keep the tire cooler, and extend it's life.

The number that GM puts on the door is the lowest number that meets general purpose use of the vehicle and maximizes ride quality. They have put a lot of engineering experience into arriving at that number, so it isn't to be ignored. That being said, you also have to use a little flexibility and knowledge to understand that one tire pressure does not meet all objectives. Deviating from the advised pressure is wise if the change achieves the desired effect, e.g. better gas mileage, without exceeding the maximum rated pressure. Careful monitoring of the pressure, tire wear, and vehicle dynamics will provide guidance toward meeting the desired effect. :)

[Raybikes]

Your logic is true, but there is a little more to it than just a linear rise in pressure. Read on if you care to hear my :m2:.

Raising the pressure in the tire (while cool) can lower the hysteresis of the tire at speed, thus lowering the temp and pressure after running the test. So if you raise the tire pressure to 35 and run the test, the tire deforms less at speed, and the pressure may only rise to 38. If you plan on driving for an extended period of time at highway speeds (or with a load), raising the tire pressure can actually keep the tire cooler, and extend it's life.

The number that GM puts on the door is the lowest number that meets general purpose use of the vehicle and maximizes ride quality. They have put a lot of engineering experience into arriving at that number, so it isn't to be ignored. That being said, you also have to use a little flexibility and knowledge to understand that one tire pressure does not meet all objectives. Deviating from the advised pressure is wise if the change achieves the desired effect, e.g. better gas mileage, without exceeding the maximum rated pressure. Careful monitoring of the pressure, tire wear, and vehicle dynamics will provide guidance toward meeting the desired effect. :)

I'm gonna inflate to 35 psi and see the difference...Thanks

[JeSSter]

These tires will definately last longer than 20K. I've already got 10K on mine, and they look like they've barely lost the tits on them. I figure 45-50K at least before they have to be replaced. I get 65-70K out of tires on my F150.:)

[N467RX]

My door sticker says 30 and 32.5 I believe, but I've noticed that the tires don't look properly inflated (the flat area at the bottom seems excessive) even when using those numbers. I'm going on a highway trip to Phoenix tomorrow morning and I'd like to have them at a pressure that's good for that.

So does 35 front and rear sound good? I'm running Michelin LTX M/S

[Super 88]

Are you sure about the 32.5? My 05 it is 30 front and 35 rear.

I usually run about 34 front and 36 - 38 rear. I'd never run 44 or above on these vehicles.

BTW, did you happen to notice that this thread was 3 years old? :)

[bigcees]

beeni in the biz for a while and we usually inflate a cold tire on a truck to 34 psi to accommodate the various loads that are placed on them . If its just a daily driver i would go with 32 it will give you a nice soft ride compared to 36 and up

[Super 88]

If its just a daily driver i would go with 32 it will give you a nice soft ride compared to 36 and up

I haven't seen too many people talk about a soft ride. Most want handling and MPG. I've driven this vehicle over 50,000 miles, and I see (feel) very little ride difference between 30 and 36 psi.
Of course, the tire and the model truck could make some difference. The EXT are at least 400 lbs heavier than the SWB.

[N467RX]

Are you sure about the 32.5? My 05 it is 30 front and 35 rear.

I usually run about 34 front and 36 - 38 rear. I'd never run 44 or above on these vehicles.

BTW, did you happen to notice that this thread was 3 years old? :)

I just checked and it's 35. 32.5 was what I originally had on the rears before airing them and mixed up the number.

Yeah, I noticed, it's the famous search function.

I'll probably do 34 and 38 and see how it feels on my way down.

[EdLWilliams]

I have a GMC Envoy 2008 and after having the tire rotated a few months ago, I don't know how to change the Tire Pressure Monitor on board to reflect the correct tire - LF, LR, RF & RR. The tire pressure monitor is showing that LF Tire is at 36 psi even though it is mounted on the Left Rear (LR) tire. I am hoping that it is a setting in the Vehicle Settings. Any help would be greatly appreciated. I can't find my manual.:confused:

[WOOLUF1952]

At the top of the page, under RESOURCES. Click on OEM Manuals. You can download a copy of your manual to your computer. That way you will always have a copy on hand.:m2:

[knowledge5106]

I put 40 all around and I get a nice ride. Not much bounce when going over bumps and turning is very good. Nice even wear all around as well.