84 turbo diesel suburban

[mrk5]

I've had that happen with low fluid.

 

[Blue85]

That's what I was thinking. What's the fluid level. It's also possible to have the filter fall out or crush a cooler line, but beyond that fixes get harder.

 

[imiceman44]

I've had that happen with low fluid.

Level is on the lower side of normal, that's why I was thinking plugged filter.
I guess I will do this filter change and fluid.
If it doesn't fix it it's time for the 4l80E