All in the title really...
Are stainless steel Saucepan glass lids dishwasher friendly?
The lids are most likely dishwasher safe.
Factors in dishwasher safe designation:
I think most better brands would pass all three factors.
The corrosion from the detergent is the wildcard. On a lesser quality brand of kitchen ware:
I agree with comment: check with the manufacturer.
OT because we're talking lids here: but, most non-stick pans are not dishwasher safe. And of course: don't put your well seasoned iron cookware in a DW.
It's not always specified, but plain glass is dishwasher safe, and the knob and its fastenings must be able to take steam. That's not to say there won't be a bit of an issue - on some of ours there's a gap under the knob that fill with water in the dishwasher - and not necessarily clean water. This is especially true if the screw needs tightening. Ours always go through the dishwasher as we essentially have a policy of "it either is dishwasher safe or it wasn't" except for items with sentimental value. Very little actually gets ruined.