2015 Sierra 5.3 Temp Fluctuations

[nhearron]

Hey Guys,

My 2015 Sierra is having an odd problem that I haven't seen before. My temp gauge is fluctuating from 210-225, but only during hard acceleration. it eventually settles back at 210. I replaced the thermostat roughly a year ago due to it staying open and overcooling. I know it wasn't a big problem, but it made me feel better. Any ideas as to what could cause it to change that much in acceleration? It has never done it before and just started not too long ago.

 

Thanks for the help in advance.

[CamGTP]

It's normal. Likely you just never payed a ton of attention to it.

 

My truck does the same thing in the summer heat. I can floor it for 10+ seconds and my coolant temps will spike above 225 and come straight back down once I lift off the throttle.

 

I've replaced my thermostat once already too but because it was running too cold in the winter.

[Grumpy Bear]

8 hours ago, nhearron said:

Hey Guys,

My 2015 Sierra is having an odd problem that I haven't seen before. My temp gauge is fluctuating from 210-225, but only during hard acceleration. it eventually settles back at 210. I replaced the thermostat roughly a year ago due to it staying open and overcooling. I know it wasn't a big problem, but it made me feel better. Any ideas as to what could cause it to change that much in acceleration? It has never done it before and just started not too long ago.

 

Thanks for the help in advance.

 

Everything is designed to be on the edge these days. Just enough cooling and not one BTU more. Summertime shows all the rough edges. Like Cameron said, it's normal.