Fuel Pressure Regulator Kit, Duramax | 2001 - 2004 SKU: 10446 Merchant Automotive Fuel Pressure Regulator Kit, Duramax | 2001 - 2004 $219.72 Add to Wish List Due to daily fluctuating stock levels, please call (616) 772-9551 for time sensitive orders. Description Repair a surging or lopey idle with a new fuel pressure regulator. 06-10 GM 6.6L Duramax Fleece Fuel Pressure Regulator Wiring Harness -15 % Part Number: FPE-HAR-DMAX-FPR Est. Ship Time: Usually Ships By Next Business Day Fleece Performance This offer ends in: 12 Day 20 Hour 07 Min 48 Sec $59.50 $69.99 Buy in monthly payments with Affirm on orders over $50. Learn more Add to Cart Buy Now Ask Question. Web.