Dalton412

So I recently got a 18 Silverado, I’ve put maybe about 2-3000 miles on it so far. But I’m having a issue that I’ve been noticing the past couple times. When I’m coming down a very steep hill & I’m slowly breaking my trucks RPM’s shoot up & the truck basically jerks forward it feels like. Almost like the engine is jumping. The notice comes on my dash “Grade Braking Assistance” but it concerns me as far as damaging anything.