2011 GMC Savana 2500

Reliability tier: verified - see /disclosure/

Engine: 6.0L Vortec L96 (GM Vortec Gen IV, 6.0L)

Vortec 6000 L96 (flex-fuel from 2010) in the heavy-duty vans, 6L90-E from MY2010. Van rating 342 hp @ 5,400 / 373 lb-ft @ 4,400 (MY2015 spec sheets; JD Power/Edmunds/motormatchup). The CNG/LPG LC8 option (2018-2020, 282 hp / 320 lb-ft) is a fuel-variant of the same engine - not a separate config. The vans kept the L96 through MY2020 - one year past the HD-truck run (the trucks moved to the L8T for 2020).

Applicable failure modes (6)

Cooling system wear: water pump, fan clutch, thermostat (L96)
Exhaust manifold cracks / bolt failures (Vortec-era carryover)
Fuel delivery: pump, injectors, pressure (L96/LY6)
Ignition misfire: coils and spark plugs (L96/LY6)
Oil consumption at high mileage (Gen IV theme)
Valvetrain: lifter/rocker wear (no AFM on the HD 6.0)

Applicable parts (11)

gm-hd-gas-l96: exhaust-manifold-gasket (honest catalog gap)
gm-hd-gas-l96: exhaust-manifold (honest catalog gap)
GM 6.0L HD Fuel Injection Rail (OEM)
GM 6.0L HD Ignition Coil (OEM)
GM 6.0L HD Fuel Injector (OEM)
GM 6.0L HD Intake Manifold 2009-2019 (OEM)
GM 6.0L HD Knock Sensor (OEM)
GM 6.0L HD Spark Plug 2008-2014 (OEM)
GM 6.0L HD Thermostat Kit (OEM)
gm-hd-gas-l96: valvetrain (honest catalog gap)
GM 6.0L HD Water Pump Kit (OEM)

Platform recipes (3)

Cooling wear service for the HD 6.0 gas (mode fm-l96-cooling-wear): tow-duty wear items - water pump seep, fan clutch engagement, thermostat housing, radiator seams
Fuel delivery repair for the HD 6.0 gas (mode fm-l96-fuel-delivery, the top VOQ cluster): long cranks and lean misfire trace to the injector/pressure side
Ignition service for the HD 6.0 gas (mode fm-l96-ignition): 16 plugs on the OHV V8, one coil per cylinder