24256864 | Genuine GM® 6-Speed Transmission Control Module T14A, A40 for Silverado and Sierra

SKU: 24256864 MPN: 24256864

Tailored for Silverado and Sierra with 6.0L, 6.6L, 8.1L engines from 2006–2008, the Genuine GM Transmission Control Module. Part number: 24256864 maintains seamless gear transitions across heavy-duty applications.

$1,039.00
No Core Charge
2 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 24256864 Part Number 24256864
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 under Part number: 24256864 and is offered in remanufactured condition, ensuring reliable shifting precision and seamless communication between the transmission and engine systems for Chevrolet Silverado and GMC Sierra vehicles with 8-cylinder engines.

Why Replacement is Important:

A failing TCM can cause harsh or erratic shifting, gear slipping, or transmission faults that limit drivability.

Impact on Vehicle Performance:

Once restored, the transmission delivers smoother gear transitions, better throttle response, and enhanced vehicle control. 

Manufacturer Information:

General Motors® designs and engineers parts built to deliver long-lasting durability, precision, and optimal vehicle efficiency.

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: 24256864