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Hummer H3For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.
We both have '08 Alphas so the difference is you have the offroad package and I don't. That would make sense that you're 'LOW TIRE' light would come on at a higher P.S.I. then mine, as we have different recommended P.S.I. and thus, different TPMS.
Last edited by Broken Halo; Jan 5, 2024 at 03:24 PM.
Which is exactly what I said, isn't it? Low tire = LOW TIRE message. ECM not receiving a signal (that could mean dead sensor battery OR disconnected antenna) = SERV TPM message. Which is what the owner manual states. You claimed that disconnecting the antenna would NOT result in the SERV TPM message (post #19). Now you claim that it will (post #27). I swear, Hummerz, sometimes I think you post just to stir the pot.
BTW, not all H3's show 30psi.
What are you missing? #1- BCM sends the signal to the TPMS via the antenna, and with 1 or more sensors not reporting back, you WILL get the SERV TPM, HOWEVER, without the antenna the BCM is unable to send a signal, therefore NO SERV TPM nor LOW TIRE. #2-My point was ALL H3's stickers show to check when> COLD (for accurate) AIR PRESSURE! You can't adjust the pressures in a heated garage when it's 23°F outside! Lower ambient temp=lower psi!
^^^^^^^^ I get it. The pressures WERE set and CHECKED when the tires were 'cold' which really means not having been driven recently. You're confusing 'cold' with 'ambient'. If tires could only be set and checked when 'cold' people living in Florida would have a hard time accurately setting and checking their tires.
1. START WITH COLD TIRES IF POSSIBLE. Vehicle manufacturers specify PSI – literally “pounds per square inch” of pressure – assuming tires are cold. Tires are considered cold when the vehicle has been parked for three hours or more, or if the vehicle has been driven less than a mile (1.6 km) at moderate speed.
I don't live in Florida. Btw, I park my 3 outside(my wireless thermometer currently shows my 3 sitting @24°F) Monitor tire pressure@ambient temp.
^^^^^^^^ I get it. The pressures WERE set and CHECKED when the tires were 'cold' which really means not having been driven recently. You're confusing 'cold' with 'ambient'.
Originally Posted by hummerz
I don't live in Florida. Btw, I park my 3 outside(my wireless thermometer currently shows my 3 sitting @24°F) Monitor tire pressure@ambient temp.
I see you finally grasped the concept of 'ambient'.....as for the rest of your post, I don't have a clue what your point is. @650Hawk is right, arguing with you is like trying to put toothpaste back in the tube. Doc, I request you lock this thread I started as it's no longer relevant.
What are you missing? #1- BCM sends the signal to the TPMS via the antenna, and with 1 or more sensors not reporting back, you WILL get the SERV TPM, HOWEVER, without the antenna the BCM is unable to send a signal, therefore NO SERV TPM nor LOW TIRE. #2-My point was ALL H3's stickers show to check when> COLD (for accurate) AIR PRESSURE! You can't adjust the pressures in a heated garage when it's 23°F outside! Lower ambient temp=lower psi!
And what are YOU missing? The BCM has no idea if the antenna is unplugged or not. It's not a "smart" antenna, it's simply a piece of wire. The BCM tries to send a signal, gets no response (which IS a malfunction by definition), and the result is a SERV TPM message.
There have been multiple posts over the years about how to turn off the TPMS system. If it were as easy as you claim, that answer (unplugging the antenna) would have been given years ago and multiple times. Sorry, not buying it. And the video you posted makes no mention of that either, so I have to believe that was simply a diversionary tactic on your part, that did nothing more than waste 15 minutes of my life.
The pic of my door sticker was not about you, it was pointing out to the OP that the H3s with 285s recommend a different pressure. 30psi seemed low to me for a 5,000lb truck, and I stated that I was going to look at mine. All stickers everywhere, not just H3s, say "Cold Tire Pressure". Duh; common knowledge. You treat people like they're all idiots, and it's not attractive. I'll bet you're a riot at parties.
For the OP; since you are running significantly larger tires than stock, your sticker's PSI numbers really don't apply anymore, so bumping the pressure up to 38+ is the solution to your problem, and should eliminate the LOW TIRE message.
And what are YOU missing? The BCM has no idea if the antenna is unplugged or not. It's not a "smart" antenna, it's simply a piece of wire. The BCM tries to send a signal, gets no response (which IS a malfunction by definition), and the result is a SERV TPM message.
There have been multiple posts over the years about how to turn off the TPMS system. If it were as easy as you claim, that answer (unplugging the antenna) would have been given years ago and multiple times. Sorry, not buying it. And the video you posted makes no mention of that either, so I have to believe that was simply a diversionary tactic on your part, that did nothing more than waste 15 minutes of my life.
#1-The TPMS sensors transmit a RF signal to the BCM, when a tire's pressure drops below the recommended threshold, the BCM receives a low signal then triggers a low tire pressure warning.
#2- Removing the antenna at the BCM also disables RKE.
#3- If you disconnect your radio antenna, will you receive any stations?
Now you got it. Disconnecting the antenna at the BCM, and the BCM won't receive any signal from the TPMS nor RKE.
The BCM will interpret no signal(s) from the TPMS as a malfunction, triggering the SERV TPM message.
BTW, bold type doesn't make your ramblings right, just annoying. What would actually be productive is to provide some real backup for your claim. You're a wealth of accurate knowledge on these trucks, Hummerz, but you're wrong on this one. Sorry, but we can't all be right all the time.
The BCM will interpret no signal(s) from the TPMS as a malfunction, triggering the SERV TPM message.
BTW, bold type doesn't make your ramblings right, just annoying. What would actually be productive is to provide some real backup for your claim. You're a wealth of accurate knowledge on these trucks, Hummerz, but you're wrong on this one. Sorry, but we can't all be right all the time.
Btw, I park my 3 outside(my wireless thermometer currently shows my 3 sitting @24°F) Monitor tire pressure@ambient temp. 
