Fleece Performance 01-04 GM 2500/3500 6.6L LB7 Duramax SureFlo Performance Sending Unit

Fleece Performance 01-04 GM 2500/3500 6.6L LB7 Duramax SureFlo Performance Sending Unit

Marsoni

M251S

$189.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Fleece Performance 01-04 GM 2500/3500 6.6L LB7 Duramax SureFlo Performance Sending UnitFleece Performance 01 04 GM Silverado Sierra 2500 3500 6. 6L LB7 Duramax SureFlo Performance Sending

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Note: there are no English instructions. I wanted this cleaning agent to disperse throughout the nooks and crannies of the engine, so about ten minutes before arriving at the mechanic's shop for my oil change appointment, I pulled the car over and poured this into the engine, then drove it the rest of the way there. The mechanic reported lots of sludge drained out with the oil. The engine seems to perform and sound better, as if it's not working as hard.

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Reviewed in the United States on February 15, 2026