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Yukon XL aux. fuel tank operation
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Question
56napco
My 2002 Yukon XL has dual fuel tanks and this is the first truck I've owned with this style of tank setup. I haven't been able to find anything on how these tanks work, there isn't anything in the factory repair manuals. When does the aux. tank pump turn on? Does it continuously fill the primary tank or when the primary tank reaches a specific level? Will the gauge move when the rear pump turns on or does the gauge stay in one spot until the rear tank is empty?
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