I've read the forums and think I know the answer , but I'm swapping out my rims with GM rims that do not have TPMS . As far as I can tell all I can expect is the light to stay on. I don't track race or do anything but drive the car so I can live with the light. Is this a true statement.

 

no it will keep flashing coming up in the DIC also you wont be able to turn active handling off

 

The biggest issue you will have is the speed limit applied to the car. The pressure sensors are required to detect the loss of air pressure in the run flat tires. Without the system functioning you can't tell you have a flat if the pressure goes to zero. The tires are rated to run at no more than 55 mph for less than 50 miles when there is no pressure in them if you drive faster or longer than that tire damage can occur. Run flats that run a long distance with zero pressure get very hot so there could be other issues as well.

The system automatically limits your speed in turns to 55 mph if you enter a turn at a faster speed it will apply the front brakes to slow the car. For some reason it will let you drive faster on a straight but just think about turning that steering wheel and it slows you down.

Now if you don't mind looking at the light and don't mind losing Active Handling you can pull the connector at the steering sensor which shuts down Active Handling and causes a Service Active Handling message to be displayed on the DIC as well as a light on the dash.

Bill

 

Dennis is correct - you'll have the light on and will probably keep getting DIC alerts every so often.

However, you won't have any problems driving on the street.

I looked in your profile and it says you have a 2008. The 2007 and 2008 model years give you 30 minutes of steady driving (engine/ignition on time) before you'll get a DIC message "Service Tire Monitor". That message comes up because after 30 minutes the TPMS hasn't received any signals from the tire pressure sensors, so it figures the TPMS computer must be inop - all 4 sensors don't just happen to go out at the same time, and nobody would run with no sensors, right!?!?

However, none of that will create any problems for just driving on the street.

Butt....will you be putting runflats on your new wheels???

If so, you REALLY need tire pressure sensors. There's a legalese note on the side of the tire that says you must run sensors with a runflat. I don't know how liable you really might be if you crash because you had a flat tire and didn't know it was flat, but you know our society loves to sue over everything.

Additionally, since Sept 2007 (start of the 2008 model year) it's Federal law to have sensors and a TPMS in all 4-wheeled vehicles under 10,000 lbs.

I also saw in you profile that you're a LEO, so I know you want to comply with the law!

Oh wait - didn't Atty Gen Holder say if you don't like a law you don't have to comply with it?

I say just get sensors for your new wheels.

Just MHO, YMMV

Bob

 

OR you can buy the LG Motorsports TPMS simulator for $400 and NEVER worry about TPMS ever !

My 2 pennies.

Whenever the batteries die in my TPMS sensors, I will just buy the simulators.

I have a 2006 so the batteries will die between today and sometime in 2016 or so.

http://www.lgmotorsports.com/product...oducts_id=2652

 

Bypassing them sort of defeats the main purpose they are in the car to begin with.

 

No comment

 

Corvettes have had tire pressure sensors for a looong time - I believe since the early '90's.

They didn't have them because they were required, they had them because they are a very good idea!! ESPECIALLY in runflats.

If you're driving down the highway and a runflat loses pressure, you won't know it - while going straight the stiffer sidewall just doesn't give the handling feedback that you get with a non-runflat.

That is, you won't know it while you're going straight - but when you take the off ramp in your usual spirited manner and can't figure out why you ended smashed up on the guard rail when a side load built up on the tire, maybe it's because you didn't know you lost pressure.

The C5 had runflats, and of course had a TPMS that gave an alert if you lost pressure in a tire. But, when the C5 Z06 first came out, it did not have runflats - and it did not have tire pressure sensors. Because it didn't have sensors, the TPMS was deactivated - however, if you put runflats on it, and of course mounted tire pressure sensors, you could get the TPMS activated by a dealership using a Tech 2.

But, when the C6 was being developed, the Federal law requiring sensors in ALL cars was being enacted. It required 100% of cars to have sensors by Sept 2007, and a lower percentage in the couple years prior to that until the 100% requirement went into affect. The C6 was one of the GM vehicles that got the mandatory system slightly early. And, in order to comply with the law, it could not be deactivated.

Requirements of law are that the system may not be able to be deactivated, and alerts must be given to the driver if pressure goes down in a tire, and the alert must be persistent - i.e., annoying and you can't turn off the light.

The TPMS in our cars is actually very good, and doesn't cause any problems if you just simply replace a sensor when it goes bad. The "design life" of our sensors is 10 years - of course some will fail earlier, but some may last even longer.

I have sensors in all my sets of track wheels/tires, and only had an issue one time when I had a problem with one sensor when doing a relearn procedure after swapping wheels. It did create a bad problem with brakes and pulling power during the first lap, so I came back into the pits, put some fresh batteries in my TPMS tool, and got the relearn done. No problems when I went back out.

I REALLY like having sensors in my track wheels to tell me if I have a slow loss of pressure - I can get off the track when the DIC tells me my pressure has dropped below 24 psi, instead of waiting to find out by offing into a tire wall or jersey barrier.

If I were racing (instead of just fun HPDE type events) I'd probably get the LGM unit to keep a sensor issue from messing with the AH and creating problems during a race.

I'm sure LGM markets their unit as "for off road use only" due to the Federal law requiring sensors and TPMS in all cars. They, and you, might potentially face big liability concerns if you use it on the street and lose pressure creating a problem.

Just MHO, YMMV, but I like knowing my pressures on the street and the track!!

Bob

 

Is there a reason you can't swap the existing sensors to the new wheels?

 

As I expected I got the answers I was looking for. As for a reason why I didn't swap them out it's simple. I didn't do my research and had tires and wheels put together, but haven't put them on my car yet. Then started thinking about it and couldn't find a straight answer so I went where I thought I could. Thank You all for the responses.

So now take the old ones out and bring back the set and do it right.

By the way I purchased the Y spoke rims from a forum member and what a great transaction , gotta love Vette owners.

 

A good tire man can put a sensor in a wheel without completely dismounting and rebalancing the tire. The bead is pushed back right at the valve stem and then the sensor can be installed by reaching inside...people on here have had it done. So it should not be a huge deal to install those sensors.

 

Got the TPMS and new wheels installed

 

BEZ06,

You appear to be the authority on TPMS so a question for you. I am mounting 345/35/19 NT05R Drag Radials on my new-to-me 2012 Grand Sport using an extra set of OEM rims with TPMS. At what tire pressure does the computer take over with all the intervention- (can't turn off TC/AH, speed limited to 55, etc)? Is it the "low" tire pressure of 24 or a lower pressure than indicates "flat"? I would like to run pressure at about 18 psi for the track.

I have received much conflicting information about running with / without sensors and when / how the intervention takes place. Some information suggests there is a "grace" period you can run after startup without problems. It seems the issue is made more complicated by differing parameters in the later model year C6's vs. earlier.

What say you?