GMC Sierra 2500 HD regeneration failure with reduced power due to excessive soot accumulation on GMC Sierra 2500 HD

Some GMC Sierra 2500 HD owners report experiencing regeneration failure due to excessive soot accumulation, which can lead to reduced power and the illumination of warning lights such as the Service Engine Soon (SES) light. This issue often arises when the soot level in the Diesel Particulate Filter (DPF) exceeds 140%, causing the vehicle to enter reduced power mode and cease attempts at regeneration. Additionally, excessive soot can trigger the P2463 trouble code, which may indicate a clogged or damaged DPF, wiring issues, or a faulty DPF pressure sensor. In situations where the Engine Control Module (ECM) stops attempting regeneration due to this code, owners may need to seek a controlled service regeneration to resolve the problem. Addressing the underlying causes of soot accumulation is essential for effective resolution of these issues.