I have the Banks Speed Brake, IQ, and Six Gun on my '07 GMC. I love the IQ for the gauges, but only use the Speed brake when pulling the 5th wheel in the mountains and I never use the Six Gun.
2022 Silverado 3500 High Country CC/LB, SRW, L5P. B&W Companion Hitch with pucks. Hadley air horns.
2004 32' Carriage 5th wheel. 860 watts of solar MPPT, two SOK 206 ah LiFePO4 batteries. Samlex 2,000 watt Pure Sine Wave Inverter.