Need some advice - New Yukon AT4 Ultimate check engine light came on

And there is the rub, a quality bidirectional scanner that works with global b. I am currently trying to find one to purchase. I have access to MDI 2's but when I retire from GM, i want an aftermarket scanner to be able to repair my 21 Suburban. I work with some of the people who develop the GM tools, but I will need an aftermarket scanner, when I don't have access to GM's internal network. I asked them about a comparable aftermarket, but they don't really use anything but the company tools.

Just to read codes like this under warranty you should be able to pick up a cheap scanner. You're not doing any work yourself so don't need anything fancy.

jerry455 said:

And there is the rub, a quality bidirectional scanner that works with global b. I am currently trying to find one to purchase. I have access to MDI 2's but when I retire from GM, i want an aftermarket scanner to be able to repair my 21 Suburban. I work with some of the people who develop the GM tools, but I will need an aftermarket scanner, when I don't have access to GM's internal network. I asked them about a comparable aftermarket, but they don't really use anything but the company tools.

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Autel makes a quality bi-directional scanner that many folks here in this Forum use for their 2013+ year trucks. If I remember correctly, the cost is somewhere in the $500 - $600 range. Other folks here may chime in with a specific model number of their Autel scanner.

For under $50 get the OBDFusion App for your cell phone or tablet. $10 for Apple, $5 for Android. Then get the VeePeak BLE OBDII interface from Amazon for under $40. Keep the interface in the vehicle and you will always have a code reader with your. Whether the vehicle is new and under warranty or not, you always need to know what is going on and if you an keep driving the vehicle or if it may need service more immediately. I have an interface in every vehicle I own and since I always have my phone, then there is always an OBDII scan tool at hand.

While a "bi-directional" scan tool is nice, it is not a necessary tool for OBDII and Check Engine/Service Engine Soon lights. But having a more advanced scan tool in addition to something like OBDFusion is useful, but not needed.

Although I have a 2024 Yukon with under 2000 miles, I also have a spare FPCM Part #13554821 in the vehicle. It is not IF the FPCM will fail, but WHEN! Easy to slide under the vehicle and swap the FPCM, do not even need to mount it to get back in service. A cheap $60 insurance policy IMHO!! I am a highway warrior and I refuse to be stranded due to the 3 phase inverter that is required to drive the low pressure fuel pump. I have seen so many of these similar modules fail in home HVAC systems, for the $60 this part cost, it was an easy decision to have this in the vehicle at all times.