For some reason I keep having thermostats fail.. they’ve only been lasting about a year maybe 2.
Probably because they are cheap ones.
My question is this,,is it during the warm months you can run without a thermostat or is it during the winter..
I don’t exactly remember..thanks

Buy a quality OEM or quality aftermarket. You may have an underlying issue. Have you had your coolant system flushed/serviced?

You can run without one all the time but your truck won't get up to operating temp.

You want engine trouble run without one !

What is it doing that makes you think the thermostat failed?

Only thing I’ve Done with it is flush the heater core.. I do it every fall for maintenance… weather it needs it or not.
I like to do it while it’s still warm outside and can use the garden hose

Don't run without one. You'll set a check engine light, P0128 engine coolant temp lower than expected. You'll lose fuel economy and it won't run right.

How is it failing......not opening? Staying open? Leaking?

You need to run a radiator flush.

No matter if you buy a good one (recommended) or a cheap one, if it doesn't have a weep hole, drill one in it.

I use a 1/32nd bit for the hole. What this does is gives it just enough circulation to the thermostat that it opens when it should. Some seal that well that the water is stagnant and the water around the cylinders and combustion chamber gets way hotter that it should before the heat reaches the thermostat to open it.

I’ve found out it’s not a thermostat issue,,, I made another post describing the problem