L83
Production History
- Suburban LS 5.3L EcoTec3 V8 - 2015-2020
- Suburban LT 5.3L EcoTec3 V8 - 2015-2020
- Suburban Z71 5.3L EcoTec3 V8 - 2015-2020
- Suburban RST 5.3L EcoTec3 V8 - 2019-2020
Known Failures
- AFM lifter collapse - active fuel management lifters fail between 60k-100k miles causing camshaft damage.
- Excessive oil consumption - piston ring wear leads to increased oil burn on high-mileage units.
- Timing chain tensioner wear - plastic guides degrade causing rattle and potential chain skip.
Specs
Petrol · 5.3L · 355-355hp · Direct Injection Turbocharged
Replacement Cost
Typical UK rebuilt engine: £3,500-£7,500 (supply only)



