Chevrolet Silverado 3500 HD front main engine seal leaking one quart of oil every 1000 miles despite dealer claims of repair on Chevrolet Silverado 3500 HD

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

Problem overview

Some Chevrolet Silverado 3500 HD owners report experiencing persistent oil leaks from the front main engine seal, even after dealer repair claims. These leaks are often attributed to oil system component failures and leaking engine gaskets, which may not be fully resolved by initial repairs. Owners have noted that a front main seal oil leak poses a serious risk of significant engine damage and costly repairs, necessitating prompt attention. Despite dealer assurances, some owners find that the root cause of the leak was not adequately addressed, prompting the need for dealerships to reevaluate their repair processes. If the issue continues, it is recommended that owners consult with a qualified mechanic for a detailed inspection to accurately identify the source of the leak and suggest appropriate solutions. Potential remedies may include using products like BlueDevil Oil Stop Leak for temporary relief, but a lasting fix often requires replacing the front main seal or addressing underlying issues contributing to the leak.

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