Where is the TPMS/Keyless entry module located?

05TAHOEGUY

MEMBER
2005 CHEVROLET TAHOE
5.3L
V8
2WD
AUTOMATIC
275,382 MILES

The vehicle listed above is a z71. I can't seem to find the location of the TPMS/Keyless entry module. My key FOB's no longer works, and Service Tire Monitor notification keeps popping up. I am hoping if I can find the module and reset it or something it will fix my problem. Please help

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

First, and I'm embarrassed to ask, but is the battery good in the key fob? If it is, the next thing I suggest is to scan the can-bus system for diagnostic trouble codes. CAN stands for controller area network. Basically, the different modules are tied together via a few wires. If there is a code stored, this will retrieve it regardless of the module storing it. Here is a link showing how it is done.

Note: This is the first step for diagnosing the process in my manual. See pic 1 below.

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

As far as controlling the circuit, the passenger door module is what receives the signal, communicates with the body control module, and then the request is completed. See pic 2.

Note that the TPMS is also tied into the passenger door module. See pic 3.

Let me know if you are able to have the CAN scanned. That way, we will know what direction to go. However, I suspect the problem is with the door module or the body control module.

Let me know.

Joe

See pics below.

Images (Click to make bigger)