C1112 00

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The fuel pump/trailer brake control module detects a short to ground, open or a short to voltage on the integrated trailer brake relay control active low circuit.
The fuel pump/trailer brake control module detects an open in the battery positive voltage circuit to the trailer brake control relay.
The fuel pump/trailer brake control module detects an open in the ground circuit to the trailer brake control relay.
The fuel pump/trailer brake control module detects a short to ground or open in the solid state relay enable circuit.