Chevrolet Silverado 2500 HD engine fails to accelerate above 2000 RPM with speed not exceeding 50 MPH, possible TCM communication issue on Chevrolet Silverado 2500 HD

Some Chevrolet Silverado 2500 HD owners report experiencing issues with engine acceleration, specifically failing to exceed 2000 RPM and 50 MPH, which may indicate a Transmission Control Module (TCM) communication problem. Symptoms often include an illuminated Engine Light or Service Engine Soon Warning Light, along with reduced engine torque during shifting due to the TCM requesting the Engine Control Module (ECM) to decrease torque. Potential causes for these issues may include a U0101 code signaling a communication failure between the TCM and ECM, as well as other Diagnostic Trouble Codes (DTCs) related to the Controller Area Network (CAN) bus system. Owners are advised to conduct a visual inspection of wiring and connectors, check for fluid seepage or damage, ensure the proper functioning of the TCC solenoid and torque converter, and verify that the fluid and filter are current to prevent further damage. Addressing these TCM communication problems is crucial for restoring the vehicle's performance.