A five-word sentence serves as Dave Gettleman’s message to Giants fans who see what he has done with their beloved team and are either saddened, angered or just plain disgusted.

“They just got to trust,’’ Gettleman said Friday.

The Giants were 3-13 the year before Gettleman arrived and 5-11 last season, his first as general manager, so trust is in short supply for a fan base staring at five losing seasons in the past six years. Gettleman has deconstructed the roster, shipping out or not re-signing Odell Beckham Jr., Olivier Vernon, Landon Collins, Damon “Snacks’’ Harrison and Eli Apple, taking running back Saquon Barkley instead of quarterback Sam Darnold in 2018 while making a huge 2019 draft-day investment in Daniel Jones as the next franchise quarterback.

“We feel we’ve gotten a lot done in a year in a half,’’ Gettleman said. “Just got to keep going.’’

In his first general manager stint, Gettleman took the Panthers to a Super Bowl with a roster largely, but not completely, in place for him. He stressed his long tenure as an NFL talent evaluator and the experience of those around him as reasons for fans to believe in the process he has triggered. He mentioned coach Pat Shurmur and executives Kevin Abrams, Mark Koncz, Ken Sternfeld and Chris Mara have “all been doing this for a long time, and we’re professionals.

“Give us some credit for the experience and our résumés,” he added.

“Trust we’re working our fannies off and we’re going to build a team you can be proud of.’’

Gettleman, 68, last year battled through treatments to eradicate lymphoma, and the cancer is in remission. He grew emotional when he said, “A year ago, I was fighting for my life. But I’m here and I’m healthy and I’m feisty and I come in every day to kick some ass.’’

Gettleman would not state what would constitute a successful 2019 season. He said he is confident in the improvement of second-year players such as Barkley, Will Hernandez, Lorenzo Carter and B.J., Hill, along with the rapid development of this year’s rookie class.

“It’s about just continual improvement,’’ he said. “I’m not going to put a record on it.’’