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Part record

Duramax L5P Fuel Contamination Repair Kit, 2017-2023 (XDP / Alliant Power)

aggregated Aftermarket MPNXDP; Alliant Power XD (OER) / AP57026

Full high-pressure fuel system decontamination for the Denso HP4/injector system: XDP OER-series kit covers 2017-2020; Alliant Power AP57026 (with DCR pump) covers 2020-2023. Order the SKU matching the model year. No kit verified for 2024+ - the record deliberately does not claim those configurations. Purpose: Contamination repair for the L5P's HP4 system - the failure-mode record documents the contamination path (no CP4 on the L5P, but metal-in-fuel cascades identically).

Where to buy

SellerPriceChecked
Dave's Auto Center $5797.95 2026-10-27
Dave's Auto Center $7859.31 2026-10-27

Dave's Auto Center's price, the same as in his store: we check it daily and the page follows a change within a day. No paid placement in the data layer.

What this record does and doesn't claim

Listed at Dave's Auto Center (checked 2026-10-24); fitment years per that listing.

Fits (28 configurations)