Salah slammed Slot and Reds management after being left on the bench for their 3-3 draw at Leeds on Saturday. After the outburst, Slot chose to leave Salah at home for last night's Champions League win at Inter Milan.
Speaking on TNT Sports, Gerrard says he went through a similar experience when captain during the era of Brendan Rogers and Luis Suarez.
He recalled: "He's obviously really upset he's not playing, which I respect. He won't sit out the team, I respect. A couple of lines about throwing people under the boss, wrong. Need to reverse a little bit away from that; he needs to deal with that with the manager.
"This needs Virgil van Dijk to go 'I was sorting this out for the benefit of, not even so much the club or the team. It's the fans'. I've seen this, and I've lived it. I've lived it with Suarez when he fell out with Brendan face-to-face."
Liverpool need Salah
Gerrard also admitted, "I've seen it all, and I've been there myself from a personal point of view. I've done the Salah statements in my 30s against (Manchester) United and got sent off. So no one is perfect. We've all had head loss as players.
"We've all done emotional things where we think 'oh', and I know in time when this all calms, Mo will go 'I shouldn't have said that. I maybe shouldn't have said that, and I was a bit emotional, and I was a bit hasty, and blah blah blah.
"But at the end of the day, Liverpool Football Club need Mo Salah back playing well, back scoring goals because he is the best player, the best scorer, and he will help them get out of this. If this goes on, this is bigger than what we all know and what we see."