Are stainless steel saucepan glass lids dishwasher friendly?
The lids are most likely dishwasher safe. 

Factors in dishwasher safe designation:


Will the item be damaged by high temp water? (probably not, this is a pan)
Will the item be damaged by the drying cycle heat elements? (probably not, it was designed to take high heat)
Is the item susceptible to the corrosive detergents used in dish washing?


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:  


Might the hardware (screw and washer) that attaches any handle knobs be a low quality metal?
Might the glass be soft and susceptible to abrasion? Is it really glass?
If a steel ring surrounds the lid edge, is it low quality metal?


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.