Expert Answers about GMC Sierra 2500

• Troubleshooting Trailer Wiring when 2015 GMC Sierra DIC Message Says To Check Trailer Wiring
• Based on my research and information from the 2015 GMC Sierra 2500's owner's manual, the "check trailer wiring" message means that either a trailer with electric brakes has disconnected from the Sierra, or there is a short in the wiring to the trailer's electric brakes. The owner's manual says that when this message appears, it means there is not longer power running to the trailer brakes. You will want to check the wiring on both the vehicle and trailer that leads to the trailer's electric...
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• Interior Lights On A Hawk Trailer Pulled By A 2021 GMC Sierra 2500 Not Working
• The number 63 fuse is the correct fuse to check on your 2021 GMC Sierra 2500, and it should be your trailer battery circuit. Since you said you checked out the #63 fuse, and it's all good, I recommend checking your 7-way connector/receptacle. You'll want to ensure that your connectors are free from debris and not corroded. You'll then want to use a circuit tester like the Hook Probe Circuit Tester # PTW2993 to test for continuity at the 1 o'clock position on your vehicle side 7-way connector. Or Even...
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• Solution For A 2022 GMC Sierra 2500 That Is Causing LED Trailer Lights To Flash
• The reason your trailer's lights are flashing is usually attributed to too little resistance given off of the tow vehicle to measure weather the light or not. An easy way to fix this is to use a 7-way with integrated load resistors like the 7-Way Trailer Adapter for Towing Trailers with LED Lights # C57003. This adapter will plug directly into the existing 7-way on your 2022 GMC Sierra 2500 and will provide a new 7-way socket that will recognize LED lights.
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• Will the Furrion Adapter Work with My 2021 GMC Sierra 2500?
• The Furrion 7-Way Vehicle Power Adapter for Furrion RV Observation Camera # FR87PR will work with your 2021 GMC Sierra 2500.
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• Troubleshooting a Curt A16 5th Wheel Hitch Not Hooking Up Smoothly to a Reese Sidewinder
• I have a suspicion on what the issue could be. There is a good chance that the 5th wheel hitch and wedge are not compatible with the Sidewinder. It at all comes down to what Sidewinder you have. If your Sidewinder is the more current model (68220), then the Curt A16 5th Wheel Trailer Hitch # C74FR and Sidewinder Wedge for Curt A Series 5th Wheel Trailer Hitches # C16992 would not be compatible. There was a design change between the Sidewinder generations that causes the wedge to sheer...
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• Troubleshooting An LF Error Code On A Lippert Ground Control 3.0 Leveling System
• An LF error with your Ground Control 3.0 system # LC358590 would indicate an issue with the left front leg. The first step in solving this issue is going to be checking for power. Start by plugging your trailer in to shore power, the most common issue with this system is that it requires 12.75 volts in order to operate and a lot of the time the trailer battery dips just below this. Next check the fuse for the left front leg at the control module # LC304136 for power to ensure it's not...
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• Could Switched 12 Volt Power Run to Brake Assemblies of Trailer
• Your brake controller has that feature built into it with the manual override lever but there isn't a reason why you could run a separate override switch that would put 12 volts on the brake assemblies. You should note that they would lock up immediately which would most likely be dangerous so I wouldn't recommend this as a good idea.
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• Cargo Lights on New Enclosed Trailer Blow Fuse
• If the fuse only blows after you turn the lights on, then I'd be willing to bet that there is a short on one of the wires somewhere between the switch and the lights. Unfortunately the only way to check this is to trace all of the wires for the lights looking for any sections that are damaged, frayed, or pinched that could be touching a metal part of the trailer. When I see this on newer trailers, it is often times due to the wires rubbing against a sharp metal edge of the sub-frame that...
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• Troubleshooting A Furrion Vision S Camera System That Intermittently Loses Connectivity
• If you installed the PWM Filter # VGR64VR on your Furrion Camera System # FOS05TASF and you're still having issues then I recommend unpairing the camera and monitor and redoing the pairing process. I also recommend checking the antenna and ensuring that it's fully screwed into the camera and facing up. With a 492' range it shouldn't really matter but it's worth trying. Is the camera only powering on and connecting when in reverse or is it just randomly connecting while driving around?...
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• Troubleshooting Gooseneck/Fifth Wheel 7-Way Install Where Left Turn Signal Stopped Working
• Does the left turn signal work on the 7-way that is at the rear of the truck? If so then the problem is that the connectors aren't making decent contact. Try uninstalling the # 41157 and testing to see if the left turn circuit works on the factory 7-way with a circuit tester like # PTW2993. If it does work then the problem is either in the connections made when installing the connector or somehow the connector is bad (not likely). If the turn signal on your truck isn't working you would...
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• Troubleshooting Factory Brake Controller in 2015 GMC Sierra 2500HD
• Some factory trailer brake controllers are not compatible with trailers that use an electric-over-hydraulic actuator such as # HBA-10. Aftermarket controllers like the excellent Tekonsha Prodigy P3 # 90195 include a setting to allow for proper operation with this type of set-up, or with standard electric drum brakes. In your 2015 Sierra 2500 the P3 can be installed simply, using the custom wiring adapter # 3016 that plugs in under the dash. If you do not have an EOH actuator, but instead...
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• Blowing 30-Amp Relay on a 2014 GMC Sierra 2500 if Trailer is Connected to Factory Brake Controller
• If the factory brake controller in your 2014 GMC Sierra 2500 has a switch to select its operating mode, either for electric trailer brakes or for an electric-over-hydraulic (EOH) type actuator, make sure it is in the correct position for the type of brakes on the trailer that is connected. Aftermarket controllers like the popular and reliable Tekonsha Prodigy P2 # 90885 will work with both types of brakes and have such a selector switch. If your controller has one it needs to be in the...
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• Troubleshooting 2017 GMC Sierra Breakaway Engaged Causing Error Message In Truck
• On some brake controllers, they will see an error like what you have seen when the breakaway plug is pulled because the breakaway battery sends voltage back up that brake controller wire when it causes the brakes to engage. I recommend disconnecting your truck from your trailer. Disconnecting the battery on your breakaway system then insert the pin and reconnect the breakaway battery. Then connect your truck again. This sometimes will clear the error message. If not, you will need...
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• Troubleshooting No Braking Power from Foot Brake to Trailer Brakes on 2015 GMC 2500
• I recommend using a circuit tester like # PTW2993 to check the red wire on your brake controller to ensure you are getting power from your brake light switch to your controller. If you are getting power, then you will want to check the adjustment settings on your controller. If you are testing your controller when your vehicle is stopped, you will not get a reading from the brake pedal because it is a proportional controller and no trailer braking is needed if you are not moving. The...
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• How To Secure The SM Arnold RV Chenille Microfiber Wash Mop Head To the Handle
• The mop head for the SM Arnold RV Chenille Microfiber Wash Mop # 38185-332 is a rubber material with a slot that matches up and holds the ring at the end of the handle to the mop head. Since there isn't a bolt to tighten these too items together the only way to really secure it would be to drill a hole through the rubber boot and through the handle itself and slip a carriage bolt through and secure it with a nut.
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• How to Fix Backfeed From Trailer Battery and Solar Controller on 2024 GMC Sierra 2500
• Installation of the # RM-790 will take care of that problem you're having. I would wire it on the trailer side at the battery rather than mess with the wiring on your 2024 Sierra 2500. The other solution is to follow the GM note and add a disconnect between the battery and solar controller like other trailer manufacturers have started to do. If you want to go that route you can use the # SE29VR.
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• B&W Companion 5TH Wheel Hitch, Drivers Side Jaw Won't Open
• I recommend using some penetrating lubricant on the drivers side jaws of the B&W Companion OEM 5th Wheel Hitch # BWRVK3700. The passenger side is forced open by the cam in the handle. My guess is that the jaw may have some surface rust or corrosion that has caused it to stick. If you are unable to get the jaws to work properly a Replacement Head Assembly # BWRVC3006 can be obtained. This will give you a virtually brand new hitch.
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• What Would Cause Brand New Trailers Brakes to Feel Weak
• How far did you adjust them? Since some adjustment helped noticeably it would seem that more adjustment would get you where you need to be. Typically you want to tighten them until there's a noticeable drag that you can hear as you turn the wheel by hand. It's also possible the brake assemblies are self-adjusting which would mean that with every application they'll click tighter and tighter until they are fully adjusted and would be as powerful as you'd need. What brake controller are you...
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• Demco Adapter DM6194 for a 2018 GMC Sierra 2500 has a Lot of Vertical Play After Installation
• I spoke with my contact over at Demco about adapter # DM6194 for the 2018 GMC Sierra 2500. He said that without a hitch on the adapter you can pull up on adapter and it will move slightly. This is due to the slight play between the channel in the gooseneck hitch ball hole and the ball bearings in the adapter's shank. But he said at most you should only see maybe 1/8 to 1/4 inch of vertical movement. If the adapter is installed correctly both in the gooseneck hole and at each of the 4 pucks...
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• Choosing the Correct Adjustable Shank for Weight Distribution System On a 2019 GMC Sierra 2500
• It sounds like the shank on the weight distribution system you have does not offer enough drop adjustment, which is causing your trailer to not be level. Depending on the weight distribution system you have you can purchase a different shank like the Curt Weight Distribution Shank # 17120 that will allow up to 5-3/4 inch drop for a trunnion system to help get your trailer level. I included an article that goes over how to measure for the correct rise/drop for your setup. If you can...
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