Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- Commanded gear is 1st locked.
- Transmission gearbox slip is 400 RPM for 10 s.
- The transmission commands 2nd gear if the above condition exists and detects a ratio of 2.72 - 3.01 for 1 s.
- The above condition has to occur 3 times.