LFA 6.0L engine: specs, donor vehicles & swap notes
The LFA is a 6.0 L aluminum-block Generation IV engine built 2008–2009, rated 332 hp. It came in 5 vehicle applications, including Chevrolet Tahoe Hybrid, GMC Yukon Hybrid. Things to know: it has AFM, so an aftermarket cam means a full AFM delete.
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| Spec | Value |
|---|---|
| RPO | LFA |
| Family | Generation IV |
| Years | 2008–2009 |
| Displacement | 6.0 L / 364 ci |
| Horsepower | 332 hp |
| Torque | 367 lb-ft |
| Bore × stroke | 4.0 × 3.622 in |
| Compression | 10.80:1 |
| Block | aluminum |
| AFM/DOD | Yes |
| VIN 8th digit | 5 |
| Reluctor | 58x |
| Stock cam | Cam PN 12629698; duration 200°/208° @.050 in. int./exh.; valve lift 0.472"/0.479" int./exh.; 116° LSA; 1-bolt gear, 4x; AFM Yes, VVT Yes. |
| Firing order | 1-8-7-2-6-5-4-3 |
| Plug gap | 0.040 in |
| Head casting | 799, 243 |
- AFM lifter failure (misfire, engine damage). Fix: An AFM disabler is a device you plug into the vehicle's OBD-II port to deactivate the system at the ECM level.
- AFM lifter tick. Fix: Check the oil condition and level frequently to avoid lifter trouble.
- Exhaust manifold bolt failure. Fix: Replace broken bolts with updated hardware during manifold service.
Aluminum, AFM, Hybrid
The LFA specs above are not yet confirmed against GM documents; GM ratings varied by year and vehicle.
How the LFA differs from the other 6.0 L Gen IV engines
The LFA is one of the nine 6.0 L Gen IV engines we list: L76, L77, L96, L98, LC8, LFA, LS2, LY6, LZ1. From our engine table:
- Aluminum block. Among the 6.0 L Gen IV engines, the LFA shares it with the L76, L77, L98, LS2, LZ1; the L96, LC8, LY6 are iron.
- AFM (cylinder deactivation): yes. Same as the L76, L77, LZ1; the L96, L98, LC8, LS2, LY6 don't.
- Compression 10.80:1, within the group's 9.6–10.9:1 spread.
- Up to 332 hp from the factory (8th of the nine 6.0 L Gen IV engines we list; the group tops out at 400 hp).
- VVT is Unconfirmed. Check the timing cover (a VVT cover carries the phaser solenoid) before you order cam parts.
- Built 2008–2009.
Swapping the LFA: what to plan for
- Computer: the LFA has a 58x crank. An E38 or E67 matches it; a 0411/P59 also needs a 58x-to-24x converter box and its own sensor and knock-sensor wiring. Throttle and wiring have to suit the computer too. More: how to wire your LS (the full checklist for your engine and computer).
- AFM: a stock-cam LFA can have AFM turned off in the tune; an aftermarket cam means a full AFM delete (non-AFM lifters and trays, a non-AFM valley cover, the tune). More: LS cam swap guide.
- VVT is Unconfirmed. Check the timing cover for a phaser solenoid before you order a cam or a water pump. A VVT cover needs a pump that clears it. More: accessory drives.
- Hybrid donors: these trucks drove some accessories electrically, so confirm what front accessory drive comes with the engine (not confirmed in our data).
- From a truck or SUV (Cadillac Escalade Hybrid, Chevrolet Silverado Hybrid, Chevrolet Tahoe Hybrid, GMC Sierra Hybrid and 1 more): truck accessory drive spacing (the farthest forward of the three), and the factory truck oil pan hangs low; most car swaps need a swap pan. More: accessory drive spacing · oil pans.
Refresh parts for the LFA
From our Gen IV refresh list, the parts that are specific to the LFA. Seals, gaskets and the upgrades worth doing on any Gen IV with the engine out are in the full refresh list, next to every torque spec.
| Part | GM part # | Why for this engine |
|---|---|---|
| LSXceleration Gen IV LS knock sensor 28-23730 | 28-23730 | The LFA has its knock sensors on the side of the block. |
| GM Gen IV camshaft position sensor 12591720 (58x engines) | 12591720 | 58x LFA: the cam sensor lives in the front cover. |
| Chevrolet Performance 58x crankshaft position sensor 12703627 | 12703627 | 58x LFA: the crank sensor is behind the starter. |
| GM oil pressure screen/filter 12585328 (AFM valley cover) | 12585328 | On 2007-and-later AFM V8s: Clogged screen starves the sender and causes false low-pressure codes on AFM engines. |
| Genuine GM 12610141 valley cover gasket (LS2/LS3, no AFM/DOD) | 12610141 | Needed if you delete AFM on the LFA with a non-AFM valley cover. |
From real tunes: 6.0 L on a Gen IV computer
What these settings look like in the 329 naturally aspirated pump-gas tunes for 6.0 L engines on Gen IV computers (E38, E67 and the 24x E40) in our tune library (as of 2026-10-15). Every RPO of this size is pooled, not only the LFA, and so are all cams, heads and builds: that is why the ranges are wide. Use them to spot a value that is far outside what works, not as your numbers.
| Setting | Range | Median | Tunes |
|---|---|---|---|
| Hot idle target | 550 rpm to 850 rpm | 700 rpm | 327 (middle 80%) |
| Warm idle airflow, in gear | 6.0 g/s to 12.3 g/s | 8.0 g/s | 326 (middle 80%) |
| Idle spark (around 800 rpm) | 13° to 20° | 15° | 329 (middle 80%) |
| Power enrichment (PE) lambda | 0.78 to 0.87 | 0.83 | 322 (middle 80%) |
| WOT spark at 5,000 rpm, about 0.9 g/cyl | 12.0° to 25.0° | 19.0° | 329 (middle 80%) |
For starting values matched to your LFA's cam, injectors and fuel, use the turn-on tune builder. Always finish on a dyno, and read our safe tuning limits before any wide-open pass.
Donor vehicles with the LFA
Where to find an LFA at the junkyard: 5 vehicle applications below. Confirm it from the RPO sticker in the glovebox or the 8th VIN digit (for the LFA: 5).
| Vehicle | Years |
|---|---|
| Cadillac Escalade Hybrid | 2008–2009 |
| Chevrolet Silverado Hybrid | 2008–2009 |
| Chevrolet Tahoe Hybrid | 2008–2009 |
| GMC Sierra Hybrid | 2008–2009 |
| GMC Yukon Hybrid | 2008–2009 |
Buying a used LFA
A used LFA 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 LFA: 5) before you buy.