Electronic Components

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Automatic Transmission Electronic Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
6	A/Trans Auxiliary Fluid Pump Assembly
31	A/Trans Manual Shift Shaft Position Switch Assembly
71	Drive Motor (w/Generator) Assembly - 1st Position
88	Drive Motor (w/Generator) Assembly - 2nd Position
307	Control Solenoid Valve Assembly
447	A/Trans Output Speed Sensor Assembly

Hybrid Transmission

The Hybrid transmission contains two electric drive motor with generator assemblies, 3 planetary gear sets, and 4 wet-plate clutches. The hybrid transmission can operate in either two electronically variable transmission (EV) modes or one of four fixed gear ratios. The two permanent magnet electric motors are packaged within the transmission which is installed longitudinally in the vehicle. Three high voltage A-C cables, connected to each of the two motors, attach to transmission housing and are routed via rigid conduit around the transmission then transition to flexible cable at the attachment to the drive motor control module. Transmission fluid is used for hydraulic control and transmission component and motor cooling. An auxiliary oil pump is mounted externally to the transmission and provides oil pressure during engine-off Auto-Stop operation.