2006 4l80e

2006 Silverado 1500hd, 6.0l with 4l80e

Bought a truck as a bit of a project/just to get around and do yard work, only drive a couple days a week, the truck is higher mileage. The only thing I’ve noticed that’s a bit off, is how slow it changes from park or reverse, to drive. While it’s in reverse it feels great, while it’s in drive it also feels great, strong, no slipping or hard shifting. But the only thing is, it takes probably 4 seconds or so to get into drive. Could this be the shift solenoids failing, or is it a deeper issue? I will be changing the filter and fluid in the coming weeks, but wondering if I should have the solenoids on hand ahead of time while I have the cover off.