TPMS Service: Tire Monitor System

[mnjeepmale]

2015 Tahoe LTZ. A few days ago while driving my TPMS sensor said low for the rear left tire. Then it went down to 0. An hour later the front left did the same thing. Both were showing 0. Sometimes it went to 14psi and back down to 0. Now the TPMS monitor shows -- for both tires. Another thing is when I start the vehicle I get a notification that say's 'Service' Tire Monitor System with a dismiss button.

What would be the cause of this? I have aftermarket wheels and using ACDelco sensors.

 

[strutaeng]

Probably the sensors themselves. You replaced those tire sensors?

 

[mnjeepmale]

Probably the sensors themselves. You replaced those tire sensors?

Sensors are about 3 years old. Not yet. Odd that two went out at the same time if that's the issue.

 

[strutaeng]

Yeah, that's not that old. Some of the handheld scanners/programmers will test the sensors and tell you if they are bad.

Both of my front sensors went out on my 06 Suburban, I think within a short timeframe. I'm assuming they had all been replaced by the PO?

 

[mnjeepmale]

I bought the sensors when I installed the wheels back in 1/2021. ACDelco GM Original Equipment 13598772.
I'll check to see if the battery is low with the programmer tool. I forgot it has that feature.

 

[swathdiver]

2015 Tahoe LTZ. A few days ago while driving my TPMS sensor said low for the rear left tire. Then it went down to 0. An hour later the front left did the same thing. Both were showing 0. Sometimes it went to 14psi and back down to 0. Now the TPMS monitor shows -- for both tires. Another thing is when I start the vehicle I get a notification that say's 'Service' Tire Monitor System with a dismiss button.

What would be the cause of this? I have aftermarket wheels and using ACDelco sensors.

If you know someone with an advanced scan tool or you have an OBDII adapter and one of those Apple apps that can read BCM codes, you can find out what's wrong and then deal with it accordingly.

It is not unusual for the sensors to fail together.

 

[mnjeepmale]

Now all the sensors are showing --

OBDII adapter shows the following codes:
C0760-29(confirmed)
C0755(confirmed)

C0755-29(Historical)

 

[swathdiver]

Now all the sensors are showing --

OBDII adapter shows the following codes:
C0760-29(confirmed)
C0755(confirmed)

C0755-29(Historical)

I don't know what the dash 29 means. If the C0755 is a 00, that's just low air detected.

 

[mnjeepmale]

I checked all the tires and they are around 32-33psi. I guess the next step is to replace all sensors. Unless anyone has other suggestions to check

 

[mnjeepmale]

Ordered new sensors. Hope that's the fix

 

[GlennSullivan]

What I have found is depending on where you purchase the sensors, you may be getting old stock that has been sitting on shelves for sometimes a year or more. I think that some of the sensors that end up on ebay and other online marketplaces at super great prices are, in fact, manufacturer or dealer old stock that has been part of a "stock rotation" and while they work fine when first installed, they don't end up lasting very long.

 

[trukschroeder]

Can anyone tell me where the Radio Antenna Amplifier is located on my 2020 Yukon XL Denali? I'm having intermittent issues with the key fob and TPMS and the Technical Service Bulletin 20-NA-115 states to replace it but I'm having trouble locating it on the truck.

 

[Tahoe14]

Look in the “audio and electronics” section and the post about 6 or 7 down “fob range really blows”. It has 5 or 6 pages and you will probably get your answer in that post.

 

[Fless]

Look in the “audio and electronics” section and the post about 6 or 7 down “fob range really blows”. It has 5 or 6 pages and you will probably get your answer in that post.

Might help a guy out and provide the link:

2019 Yukon Key Fob Range Blows...What Would You Do?

My new 2019 Yukon key fob range is terrible. Literally 1/3 the distance of my 2018 Sierra. Almost makes the remote start worthless. Both key fobs have the same issue. The truck came off the assembly line in April and I bought it new in early June so unless they use old batteries at the...

www.tahoeyukonforum.com

 

[Doubeleive]

Can anyone tell me where the Radio Antenna Amplifier is located on my 2020 Yukon XL Denali? I'm having intermittent issues with the key fob and TPMS and the Technical Service Bulletin 20-NA-115 states to replace it but I'm having trouble locating it on the truck.

drivers rear side behind the plastic panels, either on the rear pillar or in that general area

 

[Tahoe14]

@Fless, you will have to guide me, not that computer savvy and you are a staff member and super moderator, not playing fair.