Also the plugshare tip someone gave, turning off the "payment required"... doesn't do too much in terms of finding places to charge. Maybe D/FW TX isn't as friendly as other states, but many of the places that tote free charging are still pay chargers.
I have 16K miles on my volt, and not once have I ever plugged into any other charger except for home. The prices to charge are insane, gas is $2/gallon here, even if you double that price its still not worth it to charge in many place depending on their cost structure.
thank you to all who replied. now I am waiting for my Volt to return from bumper repairs (was scratched/dinged on delivery) ... got a three row Acadia as a loaner . First true automatic I have driven in over twenty years