Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
P0658
Control Circuit - Terminal 18 @ X175 = Short to Ground - For greater than 1 s
P0659
Control Circuit - Terminal 18 @ X175 = Open/High Resistance or Short to Voltage - For greater than 1 s
P2670
Control Circuit - Terminal 19 @ X175 = Short to Ground - For greater than 1 s
P2671
Control Circuit - Terminal 19 @ X175 = Open/High Resistance or Short to Voltage - For greater than 1 s