Trent Gonzalez

Going to try a couple things: 1. New map sensor 2. New fuel filter. low end power is awesome. Going to rule these two impactful things then go from there. Does truly feel like it’s starving for air and/or fuel.

2020 GMC Sierra 3500 SRW. Since brand new, I’ve had terrible pulling power specifically on incline grades (as low as 4%-5%). I routinely haul 5th whee trailer, 10,000-11,000 lbs. Prior to an incline I’m able to maintain 80mph no problem. However, as soon as I hit the incline, the truck bogs down to 65mph and I can’t increase my speed any more, even at full throttle. Truck temperatures are 100% within normal range and temperature has never been an issue. Truck has a derringer, CAI, and Wehrli Fab intake horn. No check engine lights so dealership isn’t able to find anything wrong. These trucks are rated for 21,500lbs so it leaves me stumped why the truck isn’t performing. It has phenomenal low end power, but it just seems to struggle on the highway. Any help would be much appreciated.