Amazon $19.95 prime shipped

http://www.amazon.com/Accu-Gage-H100X-Professional-Pressure-Protective/dp/B00HESFIJ4

For in the car I like the form factor of this one better

http://www.amazon.com/Accu-Gage-RS60XA-Professional-Pressure-Protective/dp/B00VS0T7IC

and down below you can get the rubber guard for it for $5 so $15 total and much more compact and handy for in car usage although only goes to 60psi.

you can get the ribbed sheath for $7.49 and its also prime shipped. (the regular rubber sheath is not prime found it also for $5.07 prime shipped just search accu-gage and you will find it (second page)

and I will be buying a couple of these shortly. did not even know this existed.

http://www.amazon.com/Accu-gage-Chek-Spare-Valve-Extender/dp/B0006O2S8M

you screw onto your spare and then run the other end somewhere convenient so you can both check and fill as needed your spare without digging it out!

I think my favorite is this one

http://www.amazon.com/G-H-Meiser-EZ02-EZ-Gauge/dp/B001CJHU9W

clamps onto your tire chuck AND has a pass through for the compressor. so you can fill at a gas station for example but also use your gauge to know when to stop since many do not have a gauge or its hard to read or inaccurate/broken.

$17

I use this for my TT. I have a single axle as well. Even though this comes with 4 sensors, you can use only 2 if you wish.
I bought this after a blowout as well and it has been great. Drove 2000 miles this summer so far and no issues at all.
https://www.amazon.com/gp/product/B07H7BFCJ6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Wouldn't a more practical solution be an accurate TPMS system for the tractor which can be easily paired with sensors that are either installed inside the trailer wheel or add-on sensors that replace the valve cap? That way if dropping tire pressure is detected, instead of re-inflating a failing tire the driver can pull to the side of the road and either manually inflate the tire with a lithium battery powered compressor or call for a roadside tire replacement.

I bought this on on Ebay the other day. The same model on Amazon is over $200.
http://www.ebay.com/itm/Car-Solar-TPMS-Wireless-RV-Tire-Pressure-Monitoring-System-6-Sensor-LCD-Display-/112197954340?hash=item1a1f84eb24:g:HCUAAOSwal5YIbyW&vxp=mtr

I haven't received it yet (from China), but the reviews on Amazon for it are pretty good.
https://www.amazon.com/CARCHET-Pressure-Monitoring-Trailer-External/dp/B01H3KPZSQ/ref=sr_1_1?ie=UTF8&qid=1483877702&sr=8-1&keywords=6+sensor+tpms

2. The stock charger is based on a clipper creek charger. I've found that they are some of the more reliable chargers, but it's not like most brands have a high failure rate anyway.

3. Do you like balls or bars better? It's just a different look, don't over think it.

4. Use hold mode for the highway (after reaching cruising speed) to maximize overall mpg. You will see better gas mpg if you run it in hybrid mode, but it isn't really as efficient as running it constantly at a low load.

5. You can hear the engine, but there is also the power meter specifically for the engine. It turns on and off based on requested load and battery charge level.

6. I have this hitch and it works great. I've pulled close to 1000lbs once (kind of sketchy and only drove up to 35mph) but regularly pull a trailer with kayaks. Watch pulling out the clips for the rear bumper though. You also don't need to touch the fabric cover tabs (I made that mistake)

10. The wipers will come on, but there is a bit of a delay where the car is trying to figure out if it's really raining or if you're just cleaning the windshield.

12. They are part of the valve stem. I used this tool to get the sensors paired.

I bought these, the car has no problem reading them.

Now that you mention it, I do seem to remember this. OP, it might be worth it to reach out to a service center and ask about this retrofit if you’re interested. There are a bunch of aftermarket tire pressure systems if they don’t offer a retrofit, including this one that uses Bluetooth to send the information to your phone.

The TPMS sensor is built into the valve stem inside the wheel. They're pretty inexpensive but replacing one requires dismounting the tire from the wheel. So if you need to have it replaced, the labor is equivalent to remounting a tire. Not something you can do yourself without a tire mounting machine. The system may just need to be relearned, which is something they can do in the parking lot in just a few minutes. You can do it yourself if you want, you just need a TPMS relearn tool, which is also pretty inexpensive.

TPMS CHEVROLET CRUZE RELEARN

1. Set the parking brake.
   
2. Turn the ignition to ON/RUN with the engine off.
   
3. Use the MENU button to select the Vehicle Information menu in the Driver Information Center (DIC).
   
4. Use the thumbwheel to scroll to the Tire Pressure Menu item screen.
   
5. Press the SET/CLR button to begin the sensor matching process. A message requesting
   acceptance of the process should display.
   
6. Press the SET/CLR button again to confirm the selection. The horn sounds twice to signal
   the receiver is in relearn mode and the TIRE LEARNING ACTIVE message displays on the
   DIC screen.
   
7. Start with the driver side front tire.
   
8. Place the relearn tool against the tire sidewall, near the valve stem. Then press the button
   to activate the TPMS sensor. A horn chirp confirms that the sensor identification code has
   been matched to this tire and wheel position.
   
9. Proceed to the passenger side front tire, and repeat the procedure in Step 8.
   
10. Proceed to the passenger side rear tire, and repeat the procedure in Step 8.
    
11. Proceed to the driver side rear tire, and repeat the procedure in Step 8. The horn sounds
    two times to indicate the sensor identification code has been matched to the driver side rear
    tire, and the TPMS sensor matching process is no longer active. The TIRE LEARNING
    ACTIVE message on the DIC display screen goes off.
    
12. Turn the ignition to LOCK/OFF.
    
13. Set all four tires to the recommended air pressure level as indicated on the Tire and
    Loading Information label.
    
    ​

Not sure. You can save a few loonies by going aftermarket. These work with 2014 and later:
https://www.amazon.ca/dp/B07GZBQRBS/ref=cm_sw_em_r_mt_dp_U_UypPCbFJTZZDX

Funny to see that light on... thought it was a shot of the console in my 2009 P71

I picked up one of these: https://www.amazon.com/gp/product/B076KL82JP/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1

I'm going to try and reset or reprogram this weekend...

$500 for all 4 is nuts.

Amazon has them for about $46 each and most tire shops should only charge about $20 per corner to install them for you.

https://www.amazon.com/ACDelco-13598771-Original-Equipment-Monitoring/dp/B01E6EQV1W/ref=sr_1_3?keywords=ACDelco+13598771&qid=1564676862&s=gateway&sr=8-3

If it bothers you that much just buy a Wireless Tire Pressure Monitoring System with 4 DIY Sensors. Chrisfix on Youtube even has a video installing and using one.

this one. Hopefully the link works.

Yeah, I did get TPMS sensors, and cloned them to my existing stock wheels. That way I don't have to worry about re-syncing them to the car every time I swap wheels ... just make sure that I rotate the Winters and Summers in the same sequence. I used these --> https://www.amazon.com/Autel-MX-Sensor-Programmable-Pressure-Monitoring/dp/B074J3W853/ref=sr_1_4?s=automotive&ie=UTF8&qid=1542758112&sr=1-4&keywords=autel+tpms+sensor

you can buy the tool for about $15 online. https://smile.amazon.com/gp/product/B073XH6FVK this is the one i used on my 15, prob will work fine on your 13.

I had a flat 18 miles from the dealership the day I bought my car bc they forgot to change the valve stem. I immediately bought one of those tmps systems that screw onto your valve stems and have a little display unit. Was like $40 on Amazon and it’s solar powered. https://www.amazon.com/dp/B078RD479X?ref=ppx_pop_mob_ap_share

Well it's not that bad. If you GM is the kind that requires the 'activation tool' this is the tool that will activate the sensors once you have the vehicle in 'learn mode' (see your owners manual, you might be able to get to this mode yourself)

https://www.amazon.com/VXDAS-EL-50448-Pressure-Monitor-Activation/dp/B072BK693N/

and if you get into it hardcore, one of these will do most of what any tire shop needs to do:

https://www.amazon.com/Autel-TS501-Activation-Diagnostic-Professional/dp/B01LRJ7UD2/

There are bluetooth valve caps for.cars/motorbike - but may not have an API available.

https://www.amazon.com/3T6B-Motorcycle-Bluetooth-Monitoring-Motorcycles/dp/B07DDK31GG/ref=mp_s_a_1_9?keywords=bluetooth+tpms&qid=1573833051&sr=8-9

I’m not trying to enable the OEM functionality. I am looking for something that is installed on the wheel and pairs to a device which can just live in the trunk or whatever.

I would really like it if I can look at a screen and read the tire pressure.

[Some like this, but not as ugly](PAPAGO TPMS100US GoSafe TPMS 100 Wireless Tire Pressure Monitoring System with LED Color Display, Black https://www.amazon.com/dp/B01DVG42AI/ref=cm_sw_r_cp_api_i_ZklzCbZK1HDWT)

If your car is not currently equipped with a tire pressure monitor system you can purchase an aftermarket one like this one: http://www.amazon.com/gp/aw/d/B015QTPIOC/ref=s9_top_hm_awbw_b2P0Net_g263_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=mobile-hybrid-11&pf_rd_r=0JJKESK9AH8S76QC4MV0&pf_rd_t=30901&pf_rd_p=7385f2b3-cc3c-5a55-ac1d-38af4b580afc&pf_rd_i=2201765011. Otherwise you can visually inspect your tires to see if they are low every day and use a pressure gauge if you aren't sure.