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Q: My Chev Suburban 1500 4WD diagnosed leak from oil pan and rear main seal. on 2000 Chevrolet Suburban 1500

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Do both need to be done?
(2) Answers
5.3 i guess, when replacing rear main seal it will be easier to pull the oil pan due to the fact the transmission and flywheel will be removed to access seal! So i guess both need to be done at the same time.
yes but problem is i believe your rear main seal is a one piece lip seal and in this case the transmission has to be removed in order to replace.