system
Given the following post, respond as if you're commenting on Reddit:
human
[Terminator] How much does a terminator weigh?

They're big, made of metal, how much do they weigh?

Also, how much would a T1000 weigh? I mean, it looks like it's made out of mercury, and mercury is pretty heavy stuff.
gpt
T-800s are surprisingly light, at least 20% lighter than the T-600. 

They probably aren't much heavier than you'd expect a human man of the T-800's height and build to be. Since they're meant to primarily be infiltration units, having T-800s massively outweigh the normal human population would be an immediate red flag to the resistance. Also when we see T-800s in action, their bodies react to the environment as if they had an equivalent mass to a normal human.

The T-1000 is probably the same. It was built for much the same purpose, and when it does things like drive a truck, it doesn't crush the seat or cause a conspicuous depression. And although it looks like it's made of mercury, it's not. Whatever the memetic polyalloy is actually made of, it just happens to share a superficial look.