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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 973 (Automatic Transmission - ALLISON (Introduction, Service & Replacement)) >> Description and Operation >> Electronic Component Description >> Internal Components

Internal Components

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Several components of the 1000 Series electrical control system are located within the transmission, as part of the main control valve body. These components include three types of solenoids for controlling the hydraulic action of the valves. They include the pressure switch manifold and an internal wiring harness that links the internal components with the TCM.

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