FixVault

DTC Descriptor

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC P251A

Power Take-Off (PTO) Enable Switch Circuit

DTC P251E

Power Take-Off (PTO) Engine Shutdown Control Circuit Low Voltage

DTC P251F

Power Take-Off (PTO) Engine Shutdown Control Circuit High Voltage