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2026. 6. 30. 작업

난이도 & 준비물

난이도 쉬움⏱ 예상 30~60🔧 잭스탠드

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Chicken vs Egg Symptoms from 2005 Suburban 5.3 FlexFuel

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The oil pressure thing is quite normal for the LS based 5.3L LM7 which is in her Suburban. This stems from the pump's pressure spring wearing out and/or the plunger it backs getting sticky in its bore. Best solution for this is to get a new oil pump and install it. While the oil pul isn't technically in the pan, I'm pretty sure you have to take the pan off in order to get to the bolt which holds the pickup tube on (I've only ever removed them with the engine out of the vehicle and oil pan off). As for the issues, check to make sure the battery is fully charged (at least 13+ VDC with engine off) and the alternator is charging correctly (~14.1 VDC running). If either of these are low, it could be your issue. The fuel pressure should be ~58psi. If the fuel pressure is low, it may be causing the noise you are (or were) hearing. Knock doesn't usually show itself unless there is a torque demand put on the engine, like it being in gear. Usually you wouldn't hear it unless you actually step on

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