Diagnostic Fault Information

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.

The following fault table will help determine if a hydraulic circuit or an incorrect position of a valve train component affects the transmission operation.

Component	Cause	DTCs
1-2-3-4 Clutch Piston Housing	1-2-3-4 clutch piston seal cut or damaged	P2714
1-2-3-4 and 3-5-R Clutch Housing Assembly	1-2-3-4 clutch backing plate retaining ring not seated, causing the piston to over-travel and cut 1-2-3-4 clutch piston seal	P2714
2-6 Clutch Piston Assembly	2-6 clutch piston seal failure or damaged	P2714
3-5 Reverse Clutch Piston	3-5 reverse clutch piston inner/outer seal cut or damaged	P2715
4-5-6 Clutch Piston Assembly	4-5-6 clutch piston seal failure or damaged	P2715
Automatic Transmission Fluid Filter Assembly	Oil filter loose or damaged	P2714
Automatic Transmission Fluid Pump Cover Assembly	Fluid pump cover vanes and fluid pump rotor broken 1-2-3-4 and 3-5 reverse clutch fluid seal ring, on pump cover stator shaft, cut or damaged	P2714
Center Support Assembly	Center support fluid passage seal assembly, incorrectly installed, cut or damaged Lube hole blocked, incorrectly drilled or omitted	P2714
Control Solenoid (w/body and TCM) Valve Assembly	Clutch Pressure Control Solenoid 4: Always exhausting - Stuck On Not exhausting - Stuck Off Needle piston or armature pin binding Control signal fluid supply leak - valve body filter plate assembly cracked or damaged gasket seal O-ring seals leaking	P2714 P2715
Control Solenoid (w/body and TCM) Valve Assembly	HSD failure TCM failure	P2714
Output Carrier Internal Front Gear	Installed upside down	P2714
Upper Control Valve Body	2-6 Clutch regulator valve stuck - debris, sediment, binding or scored bore	P2714 P2715