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Expert Answers about GMC Sierra 3500


  • 2021 GMC Sierra LED Turn Signals Are Hyperflashing
  • It sounds like you have a common phenomenon known as "hyperflashing" occurring on your truck. The reason your LED lights are flashing is because the LED lights draw such little power that your turn signal relay sees the bulbs being out. The Load Resistor Kit # DI34ZR will mitigate this issue by installing these inline with your factory wiring. To correct your turn signals on your 2021 GMC Sierra 3500, I recommend installing the Load Resistor Kit for LED Turn Signals # DI34ZR.
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  • Can I Use Penetrating Oil on a B&W Turnoverball with a Stuck Latch Handle
  • In most cases B&W doesn't recommend using any type of lubricant on the spring and latch on your Turnoverball # BWGNRK1016 as it will only attract dirt and moisture on that spring; however in this case you can use some penetrating oil on the ball and the latch to try to loosen everything up. My contact over at B&W mentioned that typically full engagement, if done periodically, would be enough to knock off most of the rust that would be forming. As I mentioned, you can use some penetrating...
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  • Why Is Curt PowerRide 5th Wheel Hitch Making Clank Noise When Taking Off From Stop?
  • I haven't run into this issue before with the Curt PowerRide # C36WR but my contact at Curt has and here's what he had to say: "Sound like the king pin on the trailer moving with in the jaws which is normal. Adjusting the brake controller can help some of the issue."
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  • Troubleshooting 5th Wheel Trailer Lights Not Working When Connected to 2017 GMC Sierra 3500
  • You can definitely start by checking the fuses in the fuse block located in the engine compartment of your 2017 GMC Sierra 3500. These should be the fuses in the 14 (left turn/stop), 15 (running lights), 16 (reverse lights), and 17 (right turn/stop) locations. If those look good then the next step to take is to use a circuit tester like part # PTW2992 to make sure that all of the functions on the 7-Way of your Sierra are working properly (see attached photo). Since you have a new pickup...
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  • Troubleshooting 2016 GMC Sierra 3500 HD with Intermittent Connection to Trailer Issue
  • Integrated brake controllers are really picky about what trailer brakes they will work with and sometimes there's no real rhyme or reason to why they don't work. Normally it is the EOH setups so I am a little surprised you are having an issue with your electric brakes. It could be simply an odd short on the brake output circuit that is causing the error or even just corrosion on the pins of the trailer connectors which is a really easy fix with sandpaper. The Redarc Tow Pro Elite part...
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  • Furrion Vision S Not Pairing With 2021 GMC Sierra 3500
  • So while we don't have a good solution at this point, we can however offer a fix by using load resistors which allow the camera to function properly. You could use Load Resistor Kit for LED Turn Signals - 50 Watts - 6 Ohm - Qty 2 # DI34ZR to allow your camera to function properly. Furrion and our team have been in communication and Furrion has ensured us they are actively working on a solution to resolve this issue.
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  • Solution for Pin Box That is Making Contact With Bed Rails on 2015 GMC Sierra 3500
  • There is a solution for you, though it will not be possible to raise your Curt Q20 # C16130 any more or extend your king pin. Instead, the best solution for you is to raise your trailer with an over/under conversion kit. What this does is moves your trailer's leaf springs to the top of your axle and lifts your trailer approximately the same amount as your axle's diameter plus the height of the leaf spring pack (please keep in mind this conversion kit is for use with double-eye springs...
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  • Solution For Bed Bolt That Doesn't Want To Tighten After Installing TorkLift Camper Tie-Downs
  • Glad to hear most of the installation of your TorkLift Custom Frame-Mounted Camper Tie-Downs # TLC2225 went well, however to fix the issue you're having I recommend re-tapping the threads for your bed bolt as they may be worn or stripped out. To further secure the bolt into it's spot you can also use some thread locker like: -Loctite Threadlocker 262 - High Strength - Up to 3/4" Nuts/Bolts # LT37420. I've also included an installation video for you to check out as well.
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  • Troubleshooting Snowmobile Trailer Brakes That Lock Up When Trailer is Connected to Tow Vehicle
  • If the brakes on your snowmobile trailer activate and stay locked up when you connect to your 2018 GMC Sierra 3500 then that should actually be a pretty easy fix. The pin in the 1 o'clock position on your Sierra will carry your 12V power which should be constant power (at least with the ignition on). What I believe is going on is that the brakes on your snowmobile trailer are connected to the corresponding pin on your trailer side connector. Try verifying this by taking a 12V battery...
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  • Troubleshooting Remote Not Working With Fan-Tastic Roof Vent 7350
  • Since you held down the arrows I'll assume you did it a foot away from the # FV807350. The Auto and Manual lights should begin flashing immediately, followed by all seven LED's flash once. This indicates it is programmed. You could also make sure the remote is functioning properly by looking at the transmitter with the camera on your phone. You will see the IR light flashing through the camera which means it is transmitting the signal. Assuming that all checks out it is probably a damaged...
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  • Troubleshooting Pin Box To Tailgate Clearance Issues When Using A Sliding 5th Wheel Hitch
  • Moving your B&W Companion Sliding 5th Wheel Hitch to the rear most position will unfortunately place it closer to your tailgate. Since you have a shorter bed the slider is designed to add clearance from the cab but that will unfortunately cut out clearance from your tailgate. Most people who have this issue either leave their tailgate open when making tight turns, swap it out with a net like the # TR-03, or swap it out with a 5th wheel tailgate like the # VGM-07-100 that has a cutout for...
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  • Reason Why Turning On Headlights/Running Lights Causes Problems with Trailer Lights
  • When a trailer's lights function properly until the headlights are turned on the cause is almost always a weak ground connection either on the vehicle or on the trailer. Since running lights remain on continuously, unlike turn signals and brake lights which are usually on only momentarily, these tend to show up any weakness in the ground. Those other light functions will work since they don't draw as much current but once the additional continuous load of the running lights is added to...
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  • Adapter to Fix Furrion Camera System Not Working with 2022 GMC Sierra 3500
  • Thank you for all of the information! The issue is actually your 2022 GMC Sierra 3500. For whatever reason GM decided to make the running light circuit an issue so you'll need the 7-Way Vehicle Power Adapter for Furrion RV Observation Camera # FR87PR to make your Furrion camera system compatible with your new truck. Attached is an installation video for you to check out.
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  • What To Do With Brake Cable Interfering w/ Install Of Firestone Air Bag Helper Springs 2017 GMC 3500
  • We had a similar issue when installing the Air Lift # AL88338 on a 2016 GMC Sierra in our shop. We removed the bracket which holds the brake cable in place and re-secured it later using a different bracket. I have linked that install video below where you can see the new bracket being installed at the 12:00 minute mark. You can do the same when installing the Firestone Ride-Rite Red Label Extreme Duty Air Helper Springs # F2709 on your 2017 GMC Sierra 3500. The bracket used in the video...
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  • Will Curt X5 Fifth Wheel Adapter Fit Over Spray In Bed Liner
  • Curt states that bed liners can affect the fit of the X5 # 16310. Basically if the Curt X5 can be pinned in like normal then it can be used with a bed liner. Because every truck and bed liner combination is going to be slightly different there is no set list of vehicles and liner combinations available to determine if it will fit or not. The pin hole center for the X5 is approximately 2 inches from the bottom of the unit. If you can measure from the surface of your bed liner down to the...
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  • Troubleshooting Voltage Drop on Brake Output Circuit When Brakes are Wired Up on Trailer
  • It sounds like the ground of the assemblies isn't attached properly or to the correct location. Most of the time you can just run the ground wire of the assemblies to the trailer frame but if it's an aluminum frame trailer you may need to run a jumper wire from it back to the main ground of the trailer wiring harness.
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  • Troubleshooting Error Message with Titan BrakeRite I Plug and Play Electric Hydraulic Actuator
  • The female end of the 7-Way harness included with the Titan BrakeRite I Plug and Play # T4813102 that plugs into the trailer features standard 7-Way wiring. I have attached a diagram of how the connector is wired that you can check out. Since you received an error message when hooking up the unit and trailer to two different trucks, there might be an issue with the trailer side 7-Way. I recommend inspecting the 7-Way on your trailer for any debris or corrosion inside the pins that needs...
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  • Unable to Get B&W Companion Base To Fit a 2022 GMC Sierra 3500 With Factory Prep/Puck System
  • The pucks on your 2022 GMC Sierra 3500 will not be adjustable as they are a fixed part under the bed. You should be able to loosen up the cotter pins and castle nuts on the Replacement Base for B&W Companion # BWRVB3710 to get the hitch to drop into the mounting points on your bed. while they normally will drop into most the pucks without adjustment they do offer some adjustment to ensure a proper fit. Please let me know if that does not work for your base and if you can inspect the...
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  • Reese Goose Box Chucking Excessively
  • Thank you for your purchase from etrailer of the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - 20,000 lbs # RP85FR. In regards to the excessive chucking, the issue is very likely to be the air bag inside the coupler was not inflated properly for your ride. The Goose Box # RP85FR can have different amounts of air added to it to help with different trailer set ups. I recommend first just taking a look to ensure the air bag was not somehow punctured and inflates properly,...
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  • EOH Brakes on New Trailer not Working With 2016 GMC 3500 With OEM Brake Controller
  • Since you have already tested the trailer brakes with a few different trucks by different manufacturers (2 of which have been used with an Electric Over Hydraulic (EOH) system), the problem should be with your trailer. The reason that they most likely recommended checking your trucks is that we have seen issues with OEM brake controllers from manufacturers working with EOH systems. What you will first want to check is the connectors on both your 2016 GMC Sierra 3500 and your trailer. It...
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