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Expert Answers about GMC


  • Weight of Curt A20 C16541 Sliding 5th Wheel Hitch and C16023 OEM Puck Adapter
  • The Curt A20 sliding hitch # C16541 consists of two components, the Head Unit/Center section, which weighs about 90 lbs and the R20 slider unit, which weighs about 200 lbs. The adapter portion which allows the sliding hitch to attach to the OEM puck system of your 5th wheel hitch with the R20 slider, part # C16023 weighs about 70 lbs. The stationary version of the A20, part # C16140 weighs in at about 125 lbs. I've linked you to some product videos that you might find helpful.
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  • Weight of Demco Hijacker Autoslide 5th Wheel Hitch Underbed Mount for 2016 GMC Sierra 2500
  • The Demco Hijacker Autoslide 5th Wheel Trailer Hitch with Slider - Underbed Mount # DM8550022 has a shipping weight of 300 lbs, so when you subtract its shipping material it comes in at approximately 290 lbs. This hitch is a fit for your 2016 GMC Sierra 2500 when mounted in the Underbed Rail and Installation Kit for Demco Hijacker UMS 5th Wheel and Gooseneck Trailer Hitches # DM8551010. I have added a link to an installation video of those rails in an '18 Sierra 2500 for you to check...
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  • What Causes a Trailer to Bounce/Porpoise on Highway
  • Porpoising (bouncing like you described) and sway are both commonly caused by the same thing when towing and that is not enough tongue weight for the trailer relative to the total amount of weight the trailer weighs. You need the tongue weight to be between 10 and 15 percent of the total trailer weight for the porpoising to stop. Suspension enhancement would actually cause the bounce to be more severe so I would not recommend going that route. I'd get the tongue weight checked and also...
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  • Dimensions of the Curt Trailer Hitch part # C13161
  • I attached a picture that has basically every dimension of the Curt hitch part # C13161. It will hang down 8.28 inches from the mounting surface. From the rear mounting flange to the hitch opening it measures 15-3/4 inches.
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  • Measuring a 5th Wheel Trailer Pin Box to Determine if a Sidewinder Will Fit
  • Normally, the pin box model number can be found on a metal tag or sticker on the pin box. It may be located on the side or on top of the pin box. There are several different Lippert models and we have different Sidewinders available depending on which model you have. If you are unable to locate the model number, you can take some measurements and I can determine which Sidewinder, if any, will fit. For example the # RP61412 will fit a Lippert 1116 or 1716 bolt pattern. I have added a picture...
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  • Clearance Underneath BAK Revolver X4 Hard Roll Up Tonneau Cover BAK79122
  • The BAK Revolver X4 Hard Roll Up Tonneau Cover # BAK79122 that fits your 2018 GMC Sierra 3500 long bed does install inside the bed rails (rather than on top of them) to let you keep access to stake pockets for accessories. Since this cover rolls up above the bed there will not be much in the way of material that hangs below the bed rails. If you refer to the two linked detail photos that show this cover installed you'll see the clamp on rails. The bottom surface of the rolled-up cover...
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  • Towing Capacity for 2011 GMC Sierra 1500 Extended Cab
  • A pickup's towing capacity depends on several details of its configuration; these include engine, drivetrain, cab style and bed length. I referred to an online owner's manual for the 2011 Sierra 1500 and in its towing guide (owner's manual section 9-97) it indicates the 1500 Series 2WD Extended Cab Standard Box version can tow the following weights: 4.3L V6 with 3.23 axle ratio = 4400-lbs 4.8L V8 with 3.23 axle ratio = 4700-lbs 4.8L V8 with 3.73 axle ratio = 6700-lbs I sent you a separate...
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  • Mounting Hole Spacing For the 5th Wheel Adapter Rails C88KR 16027 in a 2021 GMC Sierra 2500
  • The Adapter Rails # C88KR (16027) will fit the OEM prep in your 2021 GMC Sierra 2500 and provide you with industry standard mounting points. As long as your Hijacker hitch uses industry standard rails, then it will work with the # C88KR adapter. I have also included a diagram that shows the spacing of the slots in the Adapter Rails # C88KR.
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  • How Much Weight Can You Put On Top of the TuXport Soft Tonneau Cover # TX281601?
  • I have a solution for you. Technically, the TuXport Soft Tonneau Cover # TX281601 can hold up to 200 pounds of evenly distributed weight on the cover and will fit your 1999 GMC Sierra (8-ft. bed). However, there would be difficulty with securing the kayaks to your truck without a crossbar system. With that being said, the safest way to transport your 2 kayaks would be a ladder rack system like the Adarac Custom Truck Bed Ladder Rack - Steel with Aluminum Crossbars # A70570. The Adarac...
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  • Will Curt Adjustable Trailer Hitch Receiver Fit 2010 Sierra Which Jacks
  • Curt Adjustable Trailer Hitch Receiver # C13701 fits frames from 18 to 51 inches apart and needs a place on the frame to mount to. As long as the jacks aren't in the way and there's a place to mount the hitch, it will be fine.
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  • Will the Curt Hitch C15312 Fit a 2009 GMC Cab and Chassis Van?
  • It's not designed to. The Curt Trailer Hitch item # C15312 is custom fit for 2001 - 2010 Sierra and Silverado 2500 and 3500s. The width of the bolt holes is the same as the item # 3371801102 as you can see from the dimensional diagrams below. However, nothing else is the same so you would need to do some drilling and there may be other parts like exhaust or braces in the way. The only hitch that is custom fit for a 2009 GMC cab and chassis van is the Buyers Products 2" Hitch Receiver...
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  • Can B and W Tow n Stow Adjustable Ball Mount be Used in Rise Position
  • Yes the B and W Tow and Stow ball mount # BWTS10049B that you referenced can be used in the rise position. When it is in rise position it is capable of up to 7-1/2 inches of rise.
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  • Length and Width of the Curt EZr Double Lock Underbed Gooseneck Trailer Hitch C60619
  • The length of the # C60619 is 24-1/2 inches and the wide is 12-7/8 inches. I confirmed this with my contact at Curt.
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  • What is the Measurement of the Bumper Bolt Holes of Curt Hitch # 13322?
  • I went out to the warehouse to take a measurement and found that the bumper bolt holes on Curt hitch # 13322 measured roughly 5-1/2 inches apart center-to-center. I've added a photo for you to take a look at which has these dimensions displayed.
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  • Does etrailer Hitch Lock e98882 Have Weight Capacity
  • Hitch pins and hitch pin locks like the etrailer lock # e98882 do not typically have weight capacities as they do not normally bear the weight of the trailer since the tongue weight pins the mount into the hitch tube. This would work well in a flat towing setup too even though the tongue weight isn't quite there.
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  • Dimensions Of Gen-Y Shock Absorbing 5th Wheel to Gooseneck Pin Box GY66FR
  • The Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box - Lippert 1621/1621 HD - Auto Latch - 25K # GY66FR you were looking at is a confirmed replacement for your Lippert 1621 HD pin box and will not require any shims. The # GY66FR has the same height adjustments as your current pin box, but will be roughly 2" shorter overall than your current pin box so depending on the bed length of your truck you may have cab to trailer clearance issues if not using an offset gooseneck ball....
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  • What Are the Dimensions of the TruRyde #84 Spindle for 3,500-lb Trailer Axles
  • The #84 Spindle # TRU24FR is 8-1/4" long with a 2" diameter stub. This spindle will fit the following bearings and components, which are all sold separately: Bearings- Inner bearing: # L68149 (1.378" inner diameter) Outer bearing: # L44649 (1.063" inner diameter) Races- Inner race: # L68111 Outer race: # L44610 Grease seal: # 58846 Inner diameter: 1.719" Outer diameter: 2.565"
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  • Is Kenda Karrier ST175/80R13 Trailer Wheel/Tire Balanced
  • Trailer wheel and tires are not balanced typically which is why our wheel and tire combos like the part # AM31990 are not balanced. It doesn't really end up making a difference so we don't recommend it either.
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  • Rhino-Rack Black Aero Roof Rack for 2018 GMC Canyon Crew Cab
  • For your 2018 GMC Canyon crew cab with a bare roof I can suggest the Rhino-Rack black Vortex Aero roof rack system made of parts # RRVA126B-2, # RRRLKVA and # DK330. This sleek aero style rack will be quieter than all other roof bar shapes and offers a 165-lb weight rating. It is shown in the linked video.
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  • Curt Class V Hitch Recommendation for 2006 GMC Savana 3500 Diesel
  • Yes, the CURT Trailer Hitch Receiver # C15320 has a 2 inch hitch opening, has a gross trailer weight rating of 16,000 lbs and will work on your 2006 GMC Savana 3500 diesel. You may also be interested in the following products to complete your towing setup: etrailer.com Ball Mount Kit # EBMK2216 Hopkins Custom Fit Vehicle Wiring # 31345 You should also check the towing capacities of your vehicle and be sure not to exceed the lowest rated component in your towing setup.
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