Circuit/System Testing: P0756
WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Inspect the shift solenoid/hydraulic circuit for the following conditions.
- Debris or chips in the AFL oil passage
- Debris or chips restricting oil flow in passage #29 of the case or through the spacer plate gasket into the valve body
- A cracked 2-3 shift solenoid
- A 2-3 shift valve which is stuck or hung up in the valve body bore
- A 2-3 shuttle valve which is stuck or hung up in its bore
- Damaged seals on the shift solenoid valves
- Refer to Shift Solenoid Leak Test .