I have a 2013GS, I replaced the TMS sensors on all four tires, and was told my TMS module was bad, replaced it with a used one. After about 30 minutes of driving, the TMS warning light comes on. All 4 tires then read XX... I was told recently I had bad sensors installed, most likely after market ones. I've been told to replace the after market ones with GM ones or AC Delco ones.... and the problem would go away.... The dealer did all the work... and I assumed the parts would me orginal GM. I was told they were not by this fellow as I only paid $125 a piece for them. Where can I get genuine GM sensors or AC Delco ones..... Am I being told the truth?

 

I just recently replaced all four on my '12. $40 for a set and $8 for the programming tool, both from Amazon. They work great, zero issues so far. I have access to a tire mounting machine so I did it myself. All you need to do is pop the bead and push the tire down far enough to get to the stem. It can be done at home pretty easily as well with some simple backyard contraptions.

 

Let me understand, you recently had the dealer replace your TPMS sensors but are having issues? Take it back and make them fix it. Or am I not fully understanding your issue?

 

I purchased mine from Amazon.

ACDelco GM Original Equipment 20925924 (TPMS) Sensor

But like C6VetteLover stated, if the dealer did the work, take it back and have them take care of it.

 

First of all, there is no 'TMS' module. The RCDLR is the device that stores the sensor ID's and reads the transmissions from the TPMS sensors. And if the RCDLR was 'bad', then I would expect that it wouldn't be able to communicate with the key fobs either, and since no mention of that was made, something in this saga doesn't line up. It would be a good idea to take a scan of the work order, and redact personal information, then post it up so we can see what their diagnostic was, and what was actually done. It would be unlike a GM dealership to install aftermarket parts when OEM parts like these are still available, and a huge markup by the dealer. $500 for 4 sensors? Maybe if that was the installed price and included road force balancing afterwards, but if that was for the sensors alone, they screwed you over. And it's unclear what you mean by 'after 30 minutes of driving' the warning light comes on. Does this happen every time, or just the once and the light has remained on ever since? If it's the former, then what you could be seeing is communication interference, a fairly common problem when things like BlueTooth devices are plugged in, cell and USB chargers are plugged in, and certain brands of cell phones are present in the cabin. I'd start by removing any of those if you have them and see what happens. The work order should specify which sensors were installed, and if they are the correct OEM ones for your car, then the other possibility is that their batteries had expired on the shelf. In that case, then yes, the dealership should be be able to use a TPMS tool to get a battery reading, or verify that the batteries are dead, in which case they owe you new sensors. If the batteries are OK, consider the bit above about communication interference.

 

All 4 TPMS sensors were replaced.... key fob works fine.....What I know was done is... all four TPMS sensors were replaced and and connected to the receiver... I have the old one.....I assume the dealer did a road force balance afterwards, but do not know for sure. After 30 minutes or so of driving the TPMS idiot light on the cars console starts to flash, eventually stays lite.... everytime the car is used. When I shut the car off, the light goes away... when I start the car... it comes back on by flashing and then steady lite... until the car is shut off. This happens every time. I replaced the first receiver with another one (used, as I am told new ones do not exsist) It does basically the same thing. I will check the interference thing.. thanks.

 

Certain brands of LED lamps can also cause coms problems. Do you have any of those installed? Also, when you start driving, and before you get any warnings or flashing lights on the dash, do you get accurate readings from the sensors. As in, you’ve tried scrolling through the DIC readout and each sensor position shows an accurate readout? And just to verify, when you get a TPMS error reported, all sensors display XX, or just one, and others follow suit over time?

 

I have LED lights, they were on before all this started. When I start out, all the sensors read accurate, when I get the report of an error... all 4 sensors read XX... sometimes, not often ...one reads XX.... 99% of time, all read XX.

 

So "someone" told you that all four sensors went bad at the same time, go find someone else to talk to. Better yet go back to the dealer that installed them and see if they can rectify your problem. I don't see this being a sensor problem.

 

I have the exact same issue with my 2012GS. Was this ever solved?

 

If these are the original sensors then it's a good chance the batteries are almost depleted. Tire retailers usually have a TPMS scan tool that can check the level of battery charge in each sensor. Rock Auto is a good place to buy a new set. Schrader is the original supplier of the OEM sensors.

You may find that your neighbour/friend/relative may even have one of these TPMS scan tools. They are popular in the northern States and Canada where we have to switch to winter tires and reset our TPMS twice a year....spring/fall.

 

Replace OEM TMS with Shraeder or AC Delco. After market sensors are hit and miss.

 

While I agree that aftermarket TMS sensors can be hit or miss, it would be very strange for all 4 sensors to be "bad" at the same time. Also, I believe the dealer (or whoever it was) that replaced your card reader scammed you since there is no TMS module, just the RCDLR which works with the TMS sensors and the key fobs.

From what you say, your key fobs work fine and your TMS sensors work fine for the first 30 minutes of driving. This sounds like communication interference between the sensors and the RCDLR to me. You say you have LED lights that were installed when you bought the car or at least on the car before replacing the sensors. Can I assume that you didn't have this issue then? If not, why did you replace the TMS sensors?

Like others have suggested, have you tried moving any bluetooth devices and chargers to a different location (ideally out of the car for testing purposes)? Also, have you replaced any interior bulbs with LEDs? If so, it might not hurt to disconnect (remove) those while testing as well. MANY of the LEDs are known to cause interference which could be constant or intermittent.

For sh*ts and giggles, it may help to disconnect your LED headlights (and any other LED exterior lights other than tails) while troubleshooting to see if they might be the cause as well.