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2015 GMC Savana 2500
Reliability tier: verified - see /disclosure/
Engine: 6.6L Duramax LGH (van tune) (Duramax, 6.6L)
The LGH van derate: 260 hp @ 3,100 / 525 lb-ft @ 1,600 (C/D MY2011 spec sheet; motormatchup MY2015) - the LML-family hardware at a heavy van tune (the LGH chassis-cab rating - Silverado/Sierra HD with RPO ZW9, chassis cab / box delete - is 335/685; the Kodiak/TopKick line ended in 2009 and never carried the LGH). 6L90-E. The vans carried the LGH through MY2016; the 6.6L diesel was then discontinued in the vans (replaced by the 2.8L LWN I4).
Applicable failure modes (9)
- Cooling system wear: water pump, fan clutch, oil cooler (LML)
- Bosch CP4.2 high-pressure pump failure and fuel-system contamination
- DEF system failures: tank heater, dosing, quality (LML)
- DPF regeneration service (retained system)
- EGR valve / cooler carbon and coolant service (LML)
- Glow plug / control module cold-start service (LML)
- Piezo injector failures / replacement economics (LML)
- NOx sensor failures (LML SCR system)
- VGT turbo vane carbon / actuator wear (Garrett VVT)
Applicable parts (27)
- Duramax LML Auxiliary Heated Fuel Filter Kit, 2011-2016
- duramax-lml: charge-air-cooler-pipe (honest catalog gap)
- duramax-lml: def-fluid (service item)
- Duramax LML DEF Pump/Module Kit (OEM)
- Duramax LML DEF Tank Module (OEM)
- duramax-lml: dpf-pressure-pipe (honest catalog gap)
- Duramax LML DPF Pressure Sensor, Early Chain (OEM)
- Duramax LGH EGR Cooler, van (12650369)
- Duramax LML Fuel Contamination Repair Kit, 2011-2016 (Alliant Power / XDP)
- Duramax LML Fuel Injection Pressure Relief Valve (OEM)
- Duramax LML Fuel Injection Rail, Left (OEM)
- Duramax LML Fuel Injection Rail, Right (OEM)
- Duramax LML Glow Plug (OEM)
- Duramax LML Glow Plug Control Module 2013-2016 (OEM)
- Duramax LGH Injector Kit, van (19210900)
- Duramax LML Engine Oil Cooler Assembly (OEM)
- Duramax LML In-Tank Lift Pump Upgrade (Fleece PowerFlo, 2011-2016)
- Duramax LML Silicone Coolant Hose Kit (PPE, 2011-2016)
- Duramax LGH High-Pressure Pump Kit, van (19420325)
- Duramax LML Rail Pressure Sensor (OEM)
- Duramax LML Exhaust-Tract Fuel Injector for DPF Regeneration (OEM)
- duramax-lml: thermostat (honest catalog gap)
- Duramax LGH Turbocharger Assembly (2011+, van) (12640123)
- Duramax LML Turbocharger Control Valve (OEM)
- Duramax LML Turbocharger Sensor (OEM)
- Turbocharger Speed Sensor, Shared GM Diesel Service Part (OEM)
- Duramax LML Water Pump (OEM)
Platform recipes (4)
- Bosch CP4.2 contamination repair for the LML (mode fm-lml-cp4-pump-failure): the pump's roller wears through and floods the high-pressure circuit with metal
- DEF subsystem repair for the LML (mode fm-lml-def-system) - the first DEF/SCR Duramax, and the early years carry the heaviest complaint load
- Low-pressure fuel system health for the LML (mode fm-lml-cp4-pump-failure's prevention side and fm-lml-injector-failure): the LML has an in-tank lift pump feeding the CP4, and a rail relief valve that opens under overpressure
- Cold-start repair for the LML (mode fm-lml-glow-plug): glow plugs fail open with age and the control module's drivers fail with or without plug faults
Reference for this truck
from the owner's manual
3 failures priced in parts
every OEM number we verified
the 8th character of the VIN
fuel flow by horsepower
what to inspect, in order
side by side, documented risk, no verdict