Erratic Transmission Temperature - Faulty Temp Sensor Special Coverage?

[reardiff]

Need some help on weather this is an issue worth chasing or not.  2017 Sierra 6.2 / 8 speed, transmission temperatures are at times erratic. for example, it will jump from 90 to 120,then down to 88 and back up to over 100, etc.. Or times I'll be driving for an hour and it will show only 120 which I know it will be warmer than that. Doesn't happen all the time but maybe half the time . Outside air temp doesn't seem to change anything and drives fine with no engine light.

 

I've done quite a bit of searching on this and read through the entire post below, but from what I can tell the special coverage applies to 2016 only?   So my questions are:

 

1. Does the special coverage #N192291660 apply to 2017 or just 2016? Anyone have this done on their 2017? 

 

2. Is it worth perusing?  I could take it in but with out any engine lights/codes or symptoms other than odd temperature fluctuations I'm afraid they will say nothing found and will be a wasted trip and money. Powertrain warranty ends in September so if it's something that needs documented or fixed I'd like to do it before then, but if it's nothing then I'll just let it go and keep an eye on it. Drives and shifts fine.

 

The post below was very helpful as the special coverage is specific to 6.2 / 8 speed, which I have, but didn't really address the questions above. Curious for any thoughts on if it's just let it go or worth a trip to the dealer? Last transmission fluid exchange was about 25k miles ago so the fluid should be good.

 

[JimCost2014]

On 4/28/2022 at 8:15 AM, reardiff said:

Need some help on weather this is an issue worth chasing or not.  2017 Sierra 6.2 / 8 speed, transmission temperatures are at times erratic. for example, it will jump from 90 to 120,then down to 88 and back up to over 100, etc.. Or times I'll be driving for an hour and it will show only 120 which I know it will be warmer than that. Doesn't happen all the time but maybe half the time . Outside air temp doesn't seem to change anything and drives fine with no engine light.

 

I've done quite a bit of searching on this and read through the entire post below, but from what I can tell the special coverage applies to 2016 only?   So my questions are:

 

1. Does the special coverage #N192291660 apply to 2017 or just 2016? Anyone have this done on their 2017? 

 

2. Is it worth perusing?  I could take it in but with out any engine lights/codes or symptoms other than odd temperature fluctuations I'm afraid they will say nothing found and will be a wasted trip and money. Powertrain warranty ends in September so if it's something that needs documented or fixed I'd like to do it before then, but if it's nothing then I'll just let it go and keep an eye on it. Drives and shifts fine.

 

The post below was very helpful as the special coverage is specific to 6.2 / 8 speed, which I have, but didn't really address the questions above. Curious for any thoughts on if it's just let it go or worth a trip to the dealer? Last transmission fluid exchange was about 25k miles ago so the fluid should be good.

 

Maybe pick one of these up, take some screen shots of the actual temp compared to the dash, and show them. Worth a shot for not a lot of money.