I replaced the OEM receiver hitch on my 2002 K2500 Suburban with a Putnam XDR Class V model #25162 in 2004. Cost $150. I installed it myself.
Unfortunately, Putnam is no longer in business.
The Putnam is much heavier than the OEM. I feel it was a good modification to my tow vehicle.
Here are some side by side pictures of the OEM and Putnam:
'13 Excel Winslow 34IKE
'12 GMC Sierra 3500HD
Previous RV's: '03 MobileScout Titan 29DBS; '01 Sunnybrook Lite 2708 SLE; '99 Coleman Utah
Previous TV's: '02 Chevy Suburban 2500 8.1 4.10; '99 Chevy Express 1500 5.7