duke3k

@ Ezekiel2517 above is correct when he says this. A high profile travel trailer or any trailer being towed that sticks up above the cab is basically a giant wind brake - it kills your mpg. Last October , We did a 2000 mile round trip from Colorado to Texas to pick up our new lance travel trailer. Truck: 2019 Sierra 1500 AT4 6.2L - 10 Speed transmission w/ 18'' Goodyear Duratracks. Stock Air filter & Exhaust Trailer: 2019 Lance 1985 Travel Trailer 19' trailer - tow weight on return trip was right @ 5000lb Trip out (no trailer) : mileage average between 17- 20 mpg @ 75mph - 80mph Return Trip: (a) Day 1 - Heavy cross winds/head winds (gusting to 30mph) : 5- 7mpg @ 70mph (b) Day 2 - 8 mpg @ 70mph less wind / at end of Day we dropped to 50 - 60 mph (due to road traffic) and got 10mpg duke3k

@2019DenaliRed Read back thru this thread. Your Denali is very likely using the same new Trailer Control module that is being used in 2019 and greater GM trucks. Regarding "The Furrion rear camera has no signal":::: if your camera is powered by the trailer running lights circuit - then you need to put one of these power adapters in-line just before the camera: ASA Power adapter to fix issues with GM's new smart trailering app/functions. This fixes GM's use of PWM on the trailer running lights circuit. Regarding "then the truck was connected to the truck but totally turned off I saw the lights (LED) on the outside flickering every once in a while"::: it is supposed to do this. This is done in their new smart trailering functions to be able to detect the theft of the trailer when the vehicle is off. For More information see this tech article: New Trailering App Trailer Connection and Lighting Diagnosis Regardging "-Electric brakes to the trailer are not working. Truck says they are not connected." - dunno.. duke3k

@GMmaniac That might be the issue for some of the older models , but we are pretty confident it’s the pulse width modulation (pwm) that GM is now using on the trailer running lights circuit. See the discussion a couple of posts back.

I used the Voyager ASA power adapter with my new Halo View MC7108 wireless camera and it worked fine. As long as your Furion Camera or whatever camera your using has similar power requirements it should work fine. And yes you just splice / wire it in line. + to +, - to -. Link to ASA power adapter.  

If anybody's interested here's a Before and After electrical comparison when using the ASA -"at the camera" fix to the Trailer light circuit: (A) Before: The oscilloscope is confirming that the Trailer Light Circuit when powered from a late model GM truck 2019 and greater - is using PWM on the Circuit. The Voltage drops from 14.2 V to Zero every 10 milliseconds for a duration of about 1 millisecond (i.e. the voltage is at Zero for 1 millisecond). It is this voltage dropout that is causing the camera to drop the wireless video signal. (B) After: Voltage holding steady at 14.2v w/ some slight jitter but virtually no drop at all. duke3k