I have a 2019 ZR2 Colorado. I love the truck until I got the “shudder”. They replaced my fluids and all seems good. Now I have a issue with high Rmps and horrible mileage. My RPMS run at 2400-2600 when I drive 120km/hr. If I drive 110km/hr. My rpms run around the 1800-2000 which is normal. But if I hit a incline in the road my rmps shoot up to 24-2600 and once I hit the top of the incline my rmps continues to stay at 24-2600. I have to slow down in order for the rpms to decrease. Has anyone els had this problem. I need all the help I can get.