if it's just a short section of the track, such as a guitar solo for example, I would just grab the envelope controlling the solo and move it up. If it's not already marked by nodes, insert them.
I say this because unless you have hundreds of nodes this is easy to do. If you do have hundreds of nodes in a track automation, you really need to ask yourself "Why" ?
You can also create a bus and send the track through the bus and use the bus to raise or lower the entire track volume level a bit.
If you need to turn the volume up a considerable amount.... perhaps it is better to lower everything else first? That is what I always consider when I find myself pushing a fader above 0db to hear something..... turn everything down and reset the mix starting point to a lower threshold.