First Gear Only - D4
WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
First Gear Only - D4
| Checks |
Cause |
| Sun Gear Shaft (649) |
Broken shaft or broken splines |
| AT Output Speed Sensor Assembly (22) |
Reads zero
Check for DTCs. |
| AT Input Speed Sensor Assembly (22) |
Reads zero
Check for DTCs. |