My prior truck was a F-150 which had the retractable step and grab handle that made it very easy to get up an into the bed and to return to the ground. I found this Hitchmate Grab Handle sold by Home Depot and it takes care of half the problem and works with any pickup truck.

https://www.homedepot.com/p/HitchMat...4400/304130217

Add an Amp Research step at the rear and with these two additions the Chevy is almost as good as the F-150 in terms of access to the bed.