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Expert Answers about GMC Sierra Classic


  • Why isn't Axle Spacing of Roadmaster Comfort Ride Listed
  • Since the install of the Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers # RM-2460-2560 uses the existing hangers on the trailer for the very front and very back a set wheelbase isn't stated with this kit. Basically you'll end up having a very close wheelbase to what you have now.
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  • Recommended CTEK Battery Charger for Marine Battery Running Backup Sump Pump
  • My contact at CTEK tells me that their 7002 model you'd looked at, part # CTEK56353 has a maintenance mode and could indeed be continuously used to maintain your marine battery while remaining connected to the battery, and while the battery remains connected to the pump. Once the charger senses a voltage drop in the battery, a pulse charge would be delivered to the battery until it reaches full voltage. The 7002 model would provide the set it and forget it solution that you seem to be...
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  • What Would Monitor of RVS Backup Camera RVS-83112 Look Like Used with 5th Wheel
  • I attached a picture that shows what the Rearview Safety Camera part # RVS-83112 would look like in a similar situation looking down from on top of a truck cab onto a fifth wheel hitch head. This would be very similar to an Andersen Ultimate like the # AM3200.
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  • Recommended Brake Line Kit for Use With Titan Model 60 Brake Actuating Coupler
  • The brake line kit that would be best for you will depend the number of brake assemblies, the length of the trailer and whether the brakes are drum or disc. If you have a single axle trailer using drum or disc brakes, and the distance between the actuator and the rear axle is less than 18 feet, the Kodiak # 18SI-BLKIT would work great. The flex hose is easy to work with, and you'll have no worries about a kinked brake line. For a tandem axle trailer with an actuator to rearmost axle distance...
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  • Sink Recommendation for RV Sink Hole that Measures 14-1/4 inch by 27-1/4 inch
  • Double kitchen sink # 277-000089 is measured based on the outer edge or overall length and width. So the hole that it fits in will need to be slightly smaller than 29-1/4" x 18-1/2". That should fit what you have perfectly.
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  • Trailer Brake Controller for 2007 GMC Sierra With Factory Towing Package
  • Based on my research, your 2017 Rockwood A215HW does indeed have electric trailer brakes. So for your 2007 GMC Sierra, since you have the towing package with the factory 7-way, all you will need is a trailer brake controller and the correct wiring harness. For the brake controller, I highly recommend an option from Draw-Tite: - Brake EVN Trailer Brake Controller # TK63VR I love the Brake EVN because it is a great value with its unique combination of quality and cost-effectiveness. This...
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  • Best Under Bed 5th Wheel Hitch Install Kit for a 2007 GMC Sierra 2500 Classic
  • Yes, we do offer custom fit (no drill) under bed 5th wheel hitch mounting kits for your 2007 GMC Sierra 2500 Classic. However, please note that the no drill is in reference to the frame brackets because you will need to drill through the bed floor no matter what to install a 5th wheel hitch. I recommend the Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches part # RP30061 which is essentially the same thing as the puck systems you see in the newer trucks....
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  • Curt TruTrack, Blue Ox Sway Pro or Equal-i-zer Weight Distribution Systems for 27 Foot Airstream TT
  • The Curt TruTrack # C17500 would work best on trailers with tongue weights between 700-1000 lbs, while Equal-i-zer and the Blue Ox SwayPro offer different systems for different trailer tongue weights. From a warranty standpoint, the Equal-i-zer and the SwayPro offer a limited lifetime warranty versus a 10 year limited warranty for the Curt. Equal-I-zer has focused primarily on weight distribution for a long time and they are an industry leader when it comes to weight distribution and...
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  • Suspension Enhancement Recommendation for 2007 GMC Sierra 2500HD
  • We do have the exact suspension enhancement you are looking for your 2007 GMC 2500HD Classic with the Roadactive kit part # RAS3611-HD. This kit gives you improved ride quality loaded and unloaded, has an easy install, is adjustable, and improves handling. This is only option we can guarantee will give you what you are looking for. The other options can help in some areas but typically they hurt ride quality and they aren't adjustable.
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  • Which Torklift Hitch Fits 2007 GMC Sierra Classic 2500HD Long Bed
  • The Torklift hitch part # TLC1205 is the hitch you'd need for your 2007 GMC Sierra 2500HD long bed as the # TLC1204 only fits the short bed trucks.
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  • Recommended Air Pressure in Firestone # F2250 Ride Rite Air Springs for Towing Fifth Wheel
  • The # F2250 Ride Rite system needs a minimum of 5 and a maximum of 100 psi. The proper air pressure for towing your fifth wheel would depend solely on your personal preference. I'd start at about 50 psi, and make some test runs. Add or lower air pressure until you find which level provides the most comfortable ride. You'll eventually find a comfortable towing and non-towing air pressure.
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  • Derale Thermostatic Sandwich Adapter Recommendation for a 2007 GMC 3500HD Dually
  • I would recommend you get a Derale Thermostatic Sandwich Adapter # D25782 as it comes with multiple adapter sizes to ensure that you get the correct size for your application. I did some checking and it looks like you will need the 22 mm x 1.5 mm size for your 2007 GMC 3500HD. This is one of the included sizes in the # D25782. However, since you said you have a LBZ engine and I was under the impression that the 2007 trucks had the LMM engine the # D25720 would be a safe recommendation...
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  • Firestone Air Bag Helper Springs for a 2007 GMC Sierra Classic 1500 Denali 4x4
  • For your 2007 GMC Sierra 1500 Denali 4x4 you can use Firestone Sport-Rite kit # AL59501 if the truck is a light duty. If it is a 1500HD then you can use # F2190. I also recommend a compressor kit # F2158 which will allow you to add or remove air from the air bags from the comfort of your truck cab.
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  • Roof Rack and Bike Rack Recommendations for a 1996 Jayco Eagle Tent Trailer
  • If the roof of your tent trailer is a hard shell roof that is flat then roof rack # S80510 is a great option. But if the roof is curved there are no options. I do have another possible solution for you though. If you do go with the roof rack crossbars you will also need to add 4 roof bike carriers for the 4 bikes. You will also likely have to alternate the directions the bikes are facing to fit them all on the bars. A bike rack such as # TH598004 will fit the bars and you won't have to...
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  • Solution for 40 Hitch Extension on 2007 GMC Sierra 3500 Classic Dually With Truck Bed Camper
  • For a 40" extension on your 2007 Sierra 3500 Dually you could use the Titan Hitch Box Extension # RP45018. This hitch extender comes at the full 48" length and can be cut down to 41". At That length it would have a max gross trailer weight of 5,000 lbs and tongue weight of 500 lbs. This fits a 2-1/2" receiver and reduces it down to 2". It is also possible to use weight distribution with this extension. Keep in mind, this may not work on some OEM Class V hitches with round edges. If you...
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  • How Much Horsepower and Torque does 2007 GMC Sierra Get with SuperChips Programmer
  • If your 2007 GMC Sierra has 1500 a 5.3 liter engine you'd need the SuperChips programmer # SU4845 which can give you up to an additional 18 horsepower and 17 ft lbs torque. If you have the 4.8 liter engine you'd get an increase of 13 horse power and 17 ft lbs torque. If you have a 6.0 it would give you 24 horsepower and 22 ft lbs torque. Now if you happen to have a 6.6 liter diesel engine it would give you a staggering 120 horsepower and 206 ft lbs of torque.
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  • Outriggers and 2 Step Recommendation to Replace Broken Step of 2018 Rockwood 2280BHESP
  • We have outriggers like the part # LC301704 which make installing pull out steps like the Lippert Steps part # LC432682 much easier. Your appear to be broken at the weld. The # LC301704 installs with included hardware.
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  • Recommended Trailer Brake Controller For 2007 GMC Sierra Classic 2500 HD Towing Three Horse Trailer
  • I highly recommend the Tekonsha Prodigy P3 # 90195 with the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers # 3015-P for your 2007 GMC Sierra Classic 2500 HD Diesel. The Tekonsha P3 # 90195 is a top of the line trailer brake controller that is extremely reliable and will be more than capable to control the braking for your three horse Trails West Classic Warmblood Trailer . This controller will work with trailers up to 4 axles, offers an easy to read LCD screen, and a built...
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  • Could Trailer Go From Tire Size ST205/90-15 to ST235/80R16
  • The ST235/80R16 has an outer diameter of 30.9 inches whereas the ST205/90D15 has a diameter of 29.5 inches so the diameters are pretty close. They would be close enough that there would be no issue going from one size to the other. For that you could use the part # LHACK133 for this size mounted on a wheel with a 8 lug bolt pattern or part # TA59VR for a 6 lug bolt pattern. Worth mentioning is that the tire size you have now isn't a standard trailer tire size and it's not recommended...
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  • Under Bed Brackets to Install 5th Wheel Rails in a 2007 GMC Sierra Classic 3500
  • For your 2007 GMC Sierra Classic 3500 and Reese 5th wheel hitch/accessories I recommend custom brackets and hardware # RP50064. The custom installation kits require less drilling and install quicker than universal or semi-custom kits. I have included a link to a video showing an example installation for you.
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