2016 low brake fluid warning after long non-use

[Frank8]

Started truck this afternoon after it had been parked in my garage for 3 weeks. Red “low brake fluid” came on. Brakes worked perfectly last time I used it. No fluid on garage floor under car. 51k miles. I’m 85 and have become ill so won’t be driving and was just going to take car to be detailed prior to selling. No indie near me, but a shop about 3 miles away would look at it. I have no idea why light would come on without fluid leak.
Do you guys think it’s okay to take on road and drive it to the shop? I drove it around my driveway without problem. Or is there something sneaky that I’m missing?

 

[powershift]

What did the brake fluid reservoir level look like?

 

[Frank8]

According to the manual I need to remove the engine cover on the driver side. I looked and afraid I’m not agile or strong enough to do that.
It’s puzzling because the car spent 3 weeks in the garage and there’s not a drop of anything on the concrete.

 

[powershift]

If you can't check the fluid then its better to tow it. The plastic latches on my brake fluid cover was cracked like someone tweaked it removing it. There are tabs to lock the lid down, try a standard screw driver it shouldn't be heavy. Only one latch on mine works.

 

[Frank8]

Thanks!it came off easily-I don’t think it was snapped entirely shut.
But yikes! The reservoir looks completely empty.

 

[powershift]

If it was completely empty, air could have entered the lines and that is a dangerous situation. If there was just a tiny bit left then you should be good to just refill. Otherwise, the brake system will need to be bled of air before driving it.