Chevrolet Silverado 2500 HD loss of power while pulling, transmission modular not found on Chevrolet Silverado 2500 HD

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Silverado 2500 HD owners report experiencing a loss of power while towing heavy loads, particularly noticeable when going uphill or during hard acceleration. This issue can manifest as a severe drop in power, especially when the transmission shifts to a higher gear. Many drivers express frustration over reduced engine power, which often requires thorough diagnostics to pinpoint the root cause. In some instances, the loss of power occurs suddenly, following a specific incident. Additionally, owners are advised to listen for unusual noises, such as grinding sounds from the transmission, which may indicate underlying performance problems. When troubleshooting, it's important to consider potential issues with the fuel system, transmission, and engine components like the throttle position sensor (TPS) or ignition coil. For those unable to locate the transmission module, consulting a qualified mechanic or dealership is recommended to diagnose the power loss issue effectively.

1 person reported this problem
0 comments
Schedule Repair

Chevrolet Silverado 2500 HD vehicles with this problem

0 model year affected

Search for another problem

RepairPal Car Genius

Ask our experts about your Chevrolet.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts