Chevrolet Silverado 1500 increased fuel consumption and rough idle with check engine light after extensive engine rebuild due to oil pump sensor failure on Chevrolet Silverado 1500

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

Problem overview

Some Chevrolet Silverado 1500 owners report experiencing increased fuel consumption and a rough idle accompanied by the check engine light after an extensive engine rebuild due to an oil pump sensor failure. These issues may arise from incorrect tuning, faulty sensors, or problems within the fuel system, highlighting the importance of a properly executed engine rebuild to prevent inefficiencies. Additionally, the rough idle and check engine light can indicate underlying problems, such as dirty spark plugs or stuck fuel injectors, which may have been affected during the rebuild. Owners are advised to use an OBD-II scanner to retrieve error codes for further diagnosis and to consult a qualified mechanic for a thorough assessment. Prompt attention to these concerns is crucial for ensuring optimal performance and efficiency of the vehicle.

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