Question:
Are the product rails in RP58058 and RP30035 the same rails?
asked by: Danny l
Expert Reply:
In short, yes they are the same. Part # RP58058 is just the rails. Part # RP30035 is the same rails and a universal bracket kit for trucks that do not have specific bracket kits.
The part you were looking at, part # RP50064-58, is the fifth wheel kit I would recommend for your 2009 GMC Sierra. The custom fit brackets in that kit will significantly reduce install time as they use as many factory drilled holes as possible to reduce the amount of drilling necessary for install.
We have a video of kit part # RP50064-58 being installed on a 2009 Chevy Silverado that would be helpful when installing your fifth wheel. I have included a link to the video below.
expert reply by: Patrick B

Products Referenced in This Question
Reese Universal Base Rails for 5th Wheel Trailer Hitches - 10 Bolt
Product Summary:
Fifth Wheel Installation Kit
Replacement Parts
Universal Kit
Product Specs:
Below the Bed
Hardware
Rails
Product Page this Question was Asked From
5th Wheel Base Rail and Installation Kit Recommendation for a 2013 Chevrolet 1500 6-1/2 ft Bed
Where is the 5th Wheel Hitch Positioned Relative to the Truck Cab on a 2006 Chevy Silverado 2500HD
Will Reese Custom Base Rails and Install Kit # RP50064-58 Fit a 2006 Chevy K1500 HD 6-1/2 Foot Bed
Custom Fit 5th Wheel Trailer Hitch Installation Kit for a 2007 Chevy Silverado 2500HD New Body Style
Can a 5th Wheel Trailer Hitch Be Installed if a 2006 Chevy Silverado Already has a Gooseneck Hitch
Will an Older Reese 5th Wheel Trailer Hitch Fit New Reese Rails on a 2007 Chevy Silverado 3500
Will RBW-X16 Hitch fit Reese Fifth Wheel Rails # RP50064-58 on a 2003 Chevrolet 2500HD Short Bed
Compatability Issues With A Fixed RBW X-16 Hitch and a 2004 Chevy Silverado Crew Cab HD
Can an RBW 5th Wheel Trailer Hitch be Used with Reese Rails in a 2005 Chevy Silverado 3500
Will the Custom Fifth Wheel Rail Installation Kit For a 2009 Chevy Fit 2011 Chevy Silverado 2500HD
Which Fifth Wheel Installation Kit will Fit a 2003 Ford F-350 and an RBW Lil Rocker Fifth Wheel
What Fifth Wheel 18-20K Fifth Wheel Hitch Will Fit RBW X16 Rails
Will Fifth-Wheel Rail Kit RP50064-58 Fit a 2007 Chevrolet 2500 Classic
What Fifth Wheel Installation Kit is for a 1993 Ford F-250 Pickup
Which 5th Wheel Installation Kit Fits a 2009 Chevy 1500 Crew Cab
Compatibility of an RBW 5th Wheel Trailer Hitch with Reese Base Rail Kit RP50064-58
Compatability of the Fifth Wheel Installation Kit # RP50064-58 With 1999 GMC 4x4 Extended Cab
Will Fifth Wheel Installation Kit RP50064-58 Fit a 1996 Chevy Cheyenne
Fifth Wheel Hitch, Part # 30051 and Install Kit, Part # 50041-6008 for 2005 Chevy Short Bed Pickup
Installing a Fifth Wheel Hitch on a 2005 Chevy Silverado
Does The Reese Installation Kit for my 2003 Chevy Silverado RP50064-58 Work with RBW Hitches?
Which Fifth Wheel Install Kit and Rails will Fit My 2009 Chevy Silverado 3500 and RBW Lil Rocker