25798264 | Genuine GM® 6-Speed Transmission Control Module T14A, A40 for Silverado and Sierra

SKU: 25798264 MPN: 25798264

Command your Silverado and Sierra’s shifts like never before with the Genuine GM 6-Speed Transmission Control Module. Part number: 25798264. Fits 2006–2008 models with 6.0L, 6.6L, and 8.1L engines for precise driveline coordination.

$1,039.00
No Core Charge
3 in stock

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Product Description

Product Name 6-Speed Transmission Control Module Product Name 6-Speed Transmission Control Module
Condition Remanufactured Condition Remanufactured
Brand GM® Brand GM®
Part Number 25798264 Part Number 25798264
Vehicle Compatibility
Chevrolet Silverado (2006-2008) Chevrolet Silverado (2006-2008)
GMC Sierra (2006-2008) GMC Sierra (2006-2008)
Engine Compatibility
Engine 8 Cyl 6.0L Engine 8 Cyl 6.0L
Engine 8 Cyl 6.6L Engine 8 Cyl 6.6L
Engine 8 Cyl 8.1L Engine 8 Cyl 8.1L
Module Compatibility
Model T14A, A40 Model T14A, A40
Common Diagnostic Trouble Codes
U0101 Lost communication with TCM U0101 Lost communication with TCM
U0100 Lost communication with ECM/PCM U0100 Lost communication with ECM/PCM
P2669 Computer circuit malfunction P2669 Computer circuit malfunction
P0700 Transmission Control System fault P0700 Transmission Control System fault
TCM not powering on Possible internal failure TCM not powering on Possible internal failure

Useful Information

Description and Purpose:

This Genuine GM 6-Speed Transmission Control Module comes in remanufactured condition and carries Part number: 25798264. It is engineered to regulate automatic transmission operations for Chevrolet Silverado and GMC Sierra (2006–2008) with 8-cylinder engines, ensuring precise gear changes and reliable engine-transmission communication.

Why Replacement is Important:

Replacing a faulty TCM prevents erratic shifting, transmission slipping, and potential drivetrain damage. A reliable module maintains safe and predictable vehicle handling.

Impact on Vehicle Performance:

A fully functioning transmission control module enhances shift timing, improves fuel efficiency, and ensures smooth acceleration, keeping your truck operating at peak performance.

Manufacturer Information:

General Motors® continues its tradition of excellence with components that enhance reliability and maintain superior performance.

Tags & Category: Transmission Control Module, TCM, 6-Speed TCM, GM Transmission ECU, Chevrolet Silverado TCM, GMC Sierra TCM, 6.0L 6.6L 8.1L Engines, Automatic Transmission Control, OEM GM Transmission, Engine Management Module, 6-Speed Automatic, 8 Cylinder GM Trucks, Vehicle Control Module

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 25798264