GM has issued a customer satisfaction program for a fix now offered on certain 2021 Chevy LCF (Low Cab Forward) 6500 XD medium-duty trucks involving an issue with the check engine light.
The field action repair offered for affected Chevy LCF trucks is available until December 31st, 2025 and can only be carried out by Chevrolet Medium Duty dealerships.
The problem consists of incorrect illumination of the Check Engine Malfunction Indicator Lamp when no problem actually exists. Scanning the engine may result in one of several different Diagnostic Trouble Codes (DTCs) being indicated by the service equipment. Possible DTCs are listed in the GM bulletin.
Before beginning correction of the Check Engine light, dealership service personnel should confirm involvement of the specific 2021 Chevy LCF truck using the GM Global Warranty Management system. Affected vehicles will be marked “Open” on their Investigate Vehicle History screen within the system.
Once it is confirmed a 2021 Chevy LCF is affected, service personnel can apply the fix, which consists of reprogramming the Diesel Exhaust Fluid Control Module with SPS. No replacement parts are needed to complete the repair, which consists entirely of electronic reprogramming for a new corrected calibration of the module. The whole service procedure takes slightly more than half an hour according to The General.
Notably, the affected 2021 Chevy LCF 6500 XD model was produced with the 5.2L I4 I1B turbodiesel engine supplying motivation. This powerplant develops 215 horsepower at 2,500 rpm and 520 pound-feet of torque at 1,650 rpm. The engine is paired with the Allison 2550 RDS six-speed automatic transmission.
For owners and operators of potentially affected 2021 Chevy LCF trucks who have additional questions or want more information, it is possible to call the Chevrolet toll-free customer service number listed below, identifying the specific issue with the customer satisfaction program number as needed:
- GM Customer Satisfaction Program number: N232427260
- Chevrolet Customer Service: 1-800-222-1020