2015–2020 GMC Yukon 5.3L V8 Engine Repair
This page is for the Yukon with the 5.3L V8 (L83, Active Fuel Management). The same years were also offered with the 6.2L, 4.3L V6, so confirm your engine first.
At a glance
Year-specific notes
- 2015 — 2015 is the first year of the L83 in the Yukon.
- 2020 — 2020 is the final L83 year before the L84 / L82.
How to confirm your engine
- Check the RPO sticker in the glove box for engine code L83.
- The 8th VIN digit is "C" for this engine.
- The engine cover badge and window sticker also name the engine.
Common 5.3L V8 failure areas in the Yukon
AFM lifter failure on the deactivating cylinders — the most common major repair on this generation.
Measured consumption, fouled plugs and PCV-related oil pull-over.
Direct-injection, ignition or valvetrain causes.
Diagnostic considerations
- Misfire counters by cylinder
- Oil pressure with a mechanical gauge
- Valvetrain inspection for collapsed lifters
Repair, rebuild or replace?
Many problems — a lifter, a gasket, a sensor or ignition part — can be repaired without replacing the engine. When there is internal damage we compare repair, rebuild and replacement with you, based on what inspection shows and how long you plan to keep the vehicle.
Related repair topics
Diagnosing Active and Dynamic Fuel Management faults on the 5.3L.
Collapsed lifters and damaged cam lobes on the 5.3L.
Measuring and diagnosing oil consumption on the 5.3L.
Low oil pressure warnings on the 5.3L.
Ignition, injector, lifter and mechanical misfires on the 5.3L.
How we decide between repairing, rebuilding or replacing a GM 5.3L with major internal damage.
Transmission behind the Yukon 5.3L V8
Other Yukon generations with the 5.3L V8
Request a quote for your 2015–2020 GMC Yukon
Frequently asked questions
How do I know my Yukon has the 5.3L V8?
Check the RPO sticker in the glove box for engine code L83. The 8th VIN digit is "C" for this engine. The engine cover badge and window sticker also name the engine.
Should I repair, rebuild or replace the engine?
Many problems — a lifter, a gasket, a sensor or ignition part — can be repaired without replacing the engine. When there is internal damage we compare repair, rebuild and replacement with you, based on what inspection shows and how long you plan to keep the vehicle.
Can you give a price over the phone?
We diagnose before quoting because engine repair scope varies widely. Call 602-725-6800 or request a quote to get started.