Electronic issues with no warning lights

[oregon2026]

So I’m new here and looking for some help. I have a 2020 Chevy Tahoe with 87k for miles. For the last 2 months my vehicle shuts down with now warning light, my steering goes stiff can’t turn vehicle without some muscle,dash lights go dim, head lights go dim vehicle stops moving. Last month Tahoe wouldn’t start after completely stalling. No lights no nothing, this time check engine light came on and gave me a code of U0101 (2/2) permanent Lost Communication with TCM. This code and light only came on one time. This happens intermittently and rain or shine. Dealership tells me they don’t know. Wondering if anyone else has had this issue or has any advise.

 

[Miami-Dade]

@oregon2026 Moved you here.
Welcome from Miami&NYC!

 

[the 18th letter]

So I’m new here and looking for some help. I have a 2020 Chevy Tahoe with 87k for miles. For the last 2 months my vehicle shuts down with now warning light, my steering goes stiff can’t turn vehicle without some muscle,dash lights go dim, head lights go dim vehicle stops moving. Last month Tahoe wouldn’t start after completely stalling. No lights no nothing, this time check engine light came on and gave me a code of U0101 (2/2) permanent Lost Communication with TCM. This code and light only came on one time. This happens intermittently and rain or shine. Dealership tells me they don’t know. Wondering if anyone else has had this issue or has any advise.

What’s the status of the battery? New or original

 

[RAMurphy]

Welcome to this great forum.

 

[preinternet]

So I’m new here and looking for some help. I have a 2020 Chevy Tahoe with 87k for miles. For the last 2 months my vehicle shuts down with now warning light, my steering goes stiff can’t turn vehicle without some muscle,dash lights go dim, head lights go dim vehicle stops moving. Last month Tahoe wouldn’t start after completely stalling. No lights no nothing, this time check engine light came on and gave me a code of U0101 (2/2) permanent Lost Communication with TCM. This code and light only came on one time. This happens intermittently and rain or shine. Dealership tells me they don’t know. Wondering if anyone else has had this issue or has any advise.

Sounds like Cam or crank sensor find out what your coding first thought before you spend for the wrong part

 

[rustyj671]

So I’m new here and looking for some help. I have a 2020 Chevy Tahoe with 87k for miles. For the last 2 months my vehicle shuts down with now warning light, my steering goes stiff can’t turn vehicle without some muscle,dash lights go dim, head lights go dim vehicle stops moving. Last month Tahoe wouldn’t start after completely stalling. No lights no nothing, this time check engine light came on and gave me a code of U0101 (2/2) permanent Lost Communication with TCM. This code and light only came on one time. This happens intermittently and rain or shine. Dealership tells me they don’t know. Wondering if anyone else has had this issue or has any advise.

Did you ever find a fix for this?
My 2019 with 78k on it is doing something similiar. I've noticed that the headlights will dim when I activate the brake lights as well. If I'm stopped and turn the steering wheel, sometimes it will be harder than normal to turn and the headlights will dim. Two days ago, I went to reverse into my parking spot at work and it died completely as if I shut it off. No radio, no lights, no engine, just nothing. I'm leaning toward it possiibly being the alternator (voltage regulator actually) but all of my searches keep coming with ground issues. No CEL either.

 

[rustyj671]

Did you ever find a fix for this?
My 2019 with 78k on it is doing something similiar. I've noticed that the headlights will dim when I activate the brake lights as well. If I'm stopped and turn the steering wheel, sometimes it will be harder than normal to turn and the headlights will dim. Two days ago, I went to reverse into my parking spot at work and it died completely as if I shut it off. No radio, no lights, no engine, just nothing. I'm leaning toward it possiibly being the alternator (voltage regulator actually) but all of my searches keep coming with ground issues. No CEL either.

I should also mention that the blind spot detection lights on the mirrors come on at random times. Not both at the same time though.