Hello and thanks. My experience indicates that your correct. I was wondering how they could make a compressor so small without sacrificing something. I went back to the manual to check and see what it says. The only words that indicate it is for emergency use only, is where it says to turn on the emergency flashers. Which would assume your stranded on a road someplace. Unless I missed something. I did get got caught missing something before in the manual. I snickered at the one sentence that says 'there may not be a spare tire'. Not sure how many GM cars are coming without spares.These are not beefy units. They are intended for emergency (that means, "rare") use. If you instead use the emergency air compressor regularly, expect an early end of life. Buy a heavy duty air compressor for about $150 if you want something that can handle regular top-offs, nail guns, blowing off lawn tractors, etc.
With less and less stations having air pumps it looks like we should all have air compressors now.
I am surprised this has not been mentioned before. Or at least I could not find it with a search. The idea of using these small compressors/sealers instead of spares is being seen in more and more cars.
In any case I was able to get a new one with the 2013 Bumper to Bumper warranty (less then 35K) and will try again with this one for the 2015 Volt. It should be covered but it is not specifically called out in the warranty sections