The tank comes out through the trunk.

I'd just drain it, clean the strainer, and fill it with clean diesel plus a shock does of Biobor. That should do it.

Try to fill up at high volume truck stops, thats where you get the best fuel.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200