ACDelco Automatic Transmission Control Assembly

The ACDelco Automatic Transmission Control Assembly, also called a transmission control module (TCM) or transmission control unit (TCU), is the electronic controller that manages how your automatic transmission shifts. It reads input from vehicle sensors and adjusts shift timing, shift quality and torque converter operation.

Key Features:

• Controls electronic shift timing and shift feel for smooth, consistent gear changes
• Monitors sensor and solenoid signals to help the transmission run as designed
• Replaces a failed or malfunctioning unit, which can cause harsh shifting, delayed engagement, limp mode or a lit check engine light
• Made to meet ACDelco's quality standards, with the fit and function expected of a GM-affiliated parts brand
• Supports reliable drivability and transmission longevity

ACDelco is a long-established name in automotive replacement parts and is known for dependable electronic and drivetrain components. Choose the child item that matches your application to get the correct part number. Some units may need programming after installation.