HPT GM E42 L5P Global B ECM Upgrade (*VIN & Original ECM Required*) 2003 Often times the boost leak

Often times the boost leak will make a loud squeal and then you will have to chase it down with your ear

ARP Model 400-1205

FASS Fuel Systems Model NDTSC13180F140G

Maximizes your fuel flow to the injection pump by removing the restrictive factory supply line and fitting

Each is made from solid billet aluminum

HPT GM E42 L5P Global B ECM Upgrade (*VIN & Original ECM Required*) 2003 Often times the boost leakHP Tuners Model ECM E42 L5P U HPT GM E42 L5P Global B ECM Upgrade (*VIN & Original ECM Required*) Tune your 2024 2025 Silverado Sierra 2500 3500 with the 6. 6L L5P Duramax (E42 ECM) now using HP Tuners VCM Suite! This service is required to upgrade the E42 ECM in these diesel trucks for tuning using an MPVI3 or MPVI4 device and VCM Suite. Note: Spare ECMs will NOT BE ACCEPTED, no exceptions. Only the original ECM from your vehicle is acceptable for