Andrew Best

I moved what I believed to be the antenna. There are two that clip on a m0unting plate behind the license plate on one bracket. The smaller one I believe is for the keyless remote & the larger one is for the sensors. I just disconnected it from the bracket and used one of my tag bolts to connect outside the tag temporarily. There was enough slack to do so. I can take a photo latter today and post if you would like.

I traded my 2020 3500 GMC for a 2021, it was no different as far as the signal went. i just went on a long trip. before i went I moved the antenna to the outside of the license plate to see if that helped. It did. I have a tri axle Toy Hauler and before moving the antenna i was constantly getting messages for loss of signal on the rear wheels & also the center axle. I now will get a message for the rear wheels abut once an hour which is much more tolerable.

Thank for taking the time to share this information!

FYI regarding the main receiver; I was told by my service manager that the receiver for the trucks sensors is in the left rear upper cab pillar. I am having trouble with mine loosing communication with the right front sensor. They replaced the sensor with no improvement. They claim it is due to interference from my iPhone and other electronics i have plugged into the dash as well as it being the furthest from the receiver.. However it drops it with everything unplugged also.

Just checking to see if anyone has found any information on a repeater for GM's system?

I've posted these before. I know they are expensive but they are available .I have spoken to connector experts. We use them in our body shop all the time. I don't have the electrical knowledge to know how to wire it correctly so there is not an issue or I would have done so by now. If anyone is successful please post the instructions ! Andy

My right front TPMS sensor looses signal resulting in a service tire pressure monitor message as well as the TPMS warning light coming on. My dealer has changed the right front sensor but the issue persists. The truck has gone over a thousand miles without this happening or it can happen after a few miles. It can stay on for over an hour. Looking for suggestions.

They definitely will not have the correct readying when the trailer is first pugged in. This is another feature that the aftermarket system (TST) I previously used would do that GM's won't! I could pull up next to my trailer and check the tire pressures before a trip. Now I get a reading from when I last parked it. This means it is of no use before a trip.

I think as many people as possible need to contact GM customer assistance and set up a case like I did. maybe if there is enough cases filed they will fix the issue! I work for a GMC dealership and keep checking for new information. I'm sure the fix is as simple as offering a repeater for the signal like the aftermarket systems use but I can't find anyone with GM that seems to care to help with the situation. I think the wires could be extended to the trailer and the antenna mounted there. That would be a big hassle and expense that is unnecessary in my opinion. It would also you to only using the system on one trailer.

The lower photo part number CE4003M is the female end. I verified this with connector experts through a phone call. Both ends are pinned and Have 8" of wire. I just have no electrical background and do not know how making up an extension harness would effect the operation. That is why I am hesitant to buy the connectors and run an extension wire to the trailer to mount the antenna there myself.

Found this today when diving into this again after three weeks of conversations with GM going nowhere. I believe these are the male and female connectors needed from Connector Experts (866-330-6557). We use them all the time in our body shop. If anyone has been successful in extending their range please let me know.

Thanks for the suggestion

Thank You for the suggestion . I'll see if there is enough slack in the cable to move it to outside of the bumper

Thank you for everyone's comments. Moving the antenna to the trailer sounds like an option. I really think a repeater would make more sense if someone would manufacture one that is compatible. I'm not electrically inclined. Does anyone know if Removing the factory plug and replacing it with a generic male and female plug so you could relocate the antenna close to the trailer axels would affect its performance? Andy

I work for a GMC dealership. It has been a frustrating experience for me with no help from GM. If it is further than 23' to any of the tires on your trailer from your back bumper, I don't know if I would waste the money like I did having the sensors installed., They will work but keep dropping signal. When they drop signal you get an error message on the dash you have to keep dismissing. If someone comes up with a compatible repeater I'm sure it will solve this issue. My aftermarket TST system worked fine. I had a 2019 before the 2020 and one of the main reasons I stepped up to a 2020 was the improved technology features which in my opinion were misrepresented by General Motors.

Thank you very much for your time! I think I understand your process now. I have not asked this question for awhile. I will call and ask for Derrick and see if he can help me out. Did you also relocate your plug inside your truck bed? Thanks again Andy

Is Rhino the manufacturer of the GM system?

Extension cable. Just wanted to clarify, the extension cable you had made connects to the GM supplied cable and the connects to the truck or camera to make the supplied cable longer correct? I just called them and they were not familiar with the extension cable. I have not purchased the kit due to the cable length concern as I have a 45' toy hauler. If you did get the extension cable as i understand I assume I could use your photos to have one made. Thank you Andy

Thank you for relaying the info

I have installed the correct TPMS sensors on my tri-axle 5th wheel toy hauler. The rear wheels, and sometimes the center wheels loose signal. I'm being told by my dealer that they only reach 23 feet from the trucks back bumper. That reaches the front of the tires on my second axle. There was nothing in the literature when I bought the sensors that stated the 23' limit which also makes no sense for truck that can tow 31,000 plus lbs. GM tells me there is no repeater available. That seems strange since I had an aftermarket system (TST) that had a repeater and worked fine. Has anyone had this issue and found a solution?

I have a 45' long toy hauler. I understand at that length the camera will only work as a backup camera. My concern is I do not believe the supplied cable will be long enough to route the way I would like too. Does anyone know if there is any kind of extension cable available from anywhere?

I also ran the TST system with external sensors and a repeater for approximately 10 years with no major issues. You would think GM could come up with a compatible repeater.

I have a tri-axle 5th wheel toy hauler I installed the correct tpms sensors in. going down the road it looses signal sometimes to the rear or center axle wheels. Upon questioning my dealer I was told they only have a range of 23 feet from the back bumper of my truck. 23 feet reaches the front of my center axle tires. I did not find this information on the GMC accessory website when ordering the sensors or in the owners manual. If this is correct it should be disclosed when using the feature as a selling point. has anyone had this issue and found a repeater or anyway to make the system work at a distance of over 23 feet?