L83 5.3L engine: specs, donor vehicles & swap notes
The L83 is a 5.3 L aluminum-block Generation V engine built 2014–2020, rated 355–376 hp. It came in 3 vehicle applications, including Chevrolet Silverado/GMC Sierra 1500, Chevrolet Tahoe/GMC Yukon. Things to know: it has AFM, so an aftermarket cam means a full AFM delete; it has variable valve timing; it is direct-injected (Gen V parts and controller).
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| Spec | Value |
|---|---|
| RPO | L83 |
| Family | Generation V |
| Years | 2014–2020 |
| Displacement | 5.3 L / 325 ci |
| Horsepower | 355–376 hp |
| Torque | 383–416 lb-ft |
| Bore × stroke | 3.78 × 3.622 in |
| Compression | 11.00:1 |
| Block | aluminum |
| AFM/DOD | Yes |
| VIN 8th digit | C |
| Reluctor | 58x |
| Throttle | Drive-by-wire |
| Stock cam | Cam PN 12619823; duration/lift/LSA not published; 1-bolt gear, 4x; AFM Yes, VVT Yes. |
| Firing order | 1-8-7-2-6-5-4-3 |
| Head casting | 12620214 |
| Computer | E92 (HP Tuners,.hpt) |
We tune and review logs for the L83
Gen V LT on HP Tuners. Send your E92 .hpt and logs. The free Tune Report tells you what to fix first, in plain English, within 1 business day of getting your file. Full Custom is built from your logs.
Free Tune Report Full Custom from $199
LT reports use the same format as the LS sample. The free turn-on values are LS swap tools only; LT owners start with the Tune Report or Full Custom.
- AFM lifter collapse/sticking causing misfire. Fix: Replace the valve lifter oil manifold and the affected bank of lifters (GM bulletin 15-06-01-002A); AFM delete/tune-out prevents recurrence.
- Direct-injection intake valve carbon buildup. Fix: Walnut-blast intake valves and ports; use quality fuel and frequent oil changes to slow buildup.
- High-pressure fuel pump and fuel injector failure. Fix: Replace the failed high-pressure fuel pump and/or injectors as soon as they fail.
- AFM-related oil consumption. Fix: Check oil level regularly; AFM delete and correct-viscosity oil reduce consumption.
- Bent piston oil squirters (2014 TSB). Fix: Inspect and replace bent piston oil squirters (2014 GM TSB).
Aluminum, VVT, AFM, DI, E85-capable
The L83 specs above are not yet confirmed against GM documents; GM ratings varied by year and vehicle.
How the L83 differs from the other 5.3 L Gen V engines
The L83 is one of the four 5.3 L Gen V engines we list: L82, L83, L84, L8B. From our engine table:
- Compression 11.00:1, tied with the L82, L84, L8B for the lowest of the group.
- Up to 376 hp from the factory, the most of the four 5.3 L Gen V engines we list.
- Variable valve timing. Also on the L82, L84, L8B.
- Built E85-capable (flex fuel) from the factory. Swapping an L83 onto E85 still means wiring the flex sensor and setting up the tune for it.
- Built 2014–2020.
Swapping the L83: what to plan for
- Computer: the L83 is a Gen V direct-injection engine, so it needs a Gen V computer or a Gen V-specific aftermarket kit; Gen III/IV harnesses and computers don't run it. More: LS swap ECU comparison.
- Drive-by-wire throttle: plan on the pedal and throttle body that match the L83 and its computer.
- AFM (cylinder deactivation): an aftermarket cam on the L83 means a delete kit made for Gen V engines, plus the tune.
Refresh parts for the L83
From our Gen V refresh list, the parts that are specific to the L83. Seals, gaskets and the upgrades worth doing on any Gen V with the engine out are in the full refresh list, next to every torque spec.
| Part | GM part # | Why for this engine |
|---|---|---|
| OEM-style 2014+ L83 5.3L head gasket | 12622325 | Listed for the L83; a new gasket goes on any time the heads come off. |
| GM Gen V LT knock sensor 12623095 | 12623095 | Gen V knock sensor, as on the L83. |
| GM Gen V LT camshaft position sensor 12623093 | 12623093 | Gen V cam sensor for the L83. |
| GM Gen V LT crankshaft position sensor 12669636 | 12669636 | Gen V crank sensor for the L83. |
| OEM-style LT Gen 5 cylinder head bolt kit | 11611976 | GM head bolts for Gen V engines like the L83; check the part number for yours. |
Donor vehicles with the L83
Where to find an L83 at the junkyard: 3 vehicle applications below. Confirm it from the RPO sticker in the glovebox or the 8th VIN digit (for the L83: C).
| Vehicle | Years |
|---|---|
| Chevrolet Silverado/GMC Sierra 1500 | 2014–2019 |
| Chevrolet Suburban/GMC Yukon XL | 2015–2020 |
| Chevrolet Tahoe/GMC Yukon | 2015–2020 |
Buying a used L83
A used L83 has no single part number, so this page does not link a search. Confirm the engine from the RPO sticker or the 8th VIN digit (for the L83: C) before you buy.