Circuit Description
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The pressure switch manifold (PSM) is a multiple-switch assembly made up of 3 normally open (N/O) and 1 normally closed (N/C) pressure switches. The pressure switch 1 (PS1) monitors shift solenoid valve 1 (SS1) positioning and relays it to the transmission control module (TCM). When PS1 is in the open state, SS1 should be in the destroked position.
DTC P0751 is a type A DTC.