L76 6.0L engine: specs, donor vehicles & swap notes
The L76 is a 6.0 L aluminum-block Generation IV engine built 2006–2010, rated 348–367 hp. It came in 11 vehicle applications, including Holden VZ Commodore – those built from February 2006 until July 2006 (the release of the VE series)., Holden WL Statesman/Caprice – those built from February 2006 until September 2006 (the release of the WM series).. Things to know: it has AFM, so an aftermarket cam means a full AFM delete; it has variable valve timing (truck applications only).
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| Spec | Value |
|---|---|
| RPO | L76 |
| Family | Generation IV |
| Years | 2006–2010 |
| Displacement | 6.0 L / 364 ci |
| Horsepower | 348–367 hp |
| Torque | 375–385 lb-ft |
| Bore × stroke | 4.0 × 3.622 in |
| Compression | 10.40:1 |
| Block | aluminum |
| AFM/DOD | Yes |
| VIN 8th digit | Y |
| Reluctor | 58x |
| Throttle | Drive-by-wire |
| Stock cam | Cam PN 12625439; duration 196°/208° @.050 in. int./exh.; valve lift 0.478"/0.466" int./exh.; 116° LSA; 1-bolt gear, 4x; AFM Yes (auto) / No (manual), VVT No. |
| Firing order | 1-8-7-2-6-5-4-3 |
| Oil capacity | 6.0 qt (trucks); 8.8 qt (Pontiac G8 GT) |
| Oil filter | 89017524 / PF48 |
| Spark plug | 12571164 / 41-985 |
| Plug gap | 0.040 in |
| Head casting | 5364, 823 |
- 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, VVT (truck applications only)
The L76 specs above are not yet confirmed against GM documents; GM ratings varied by year and vehicle.
How the L76 differs from the other 6.0 L Gen IV engines
The L76 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 L76 shares it with the L77, L98, LFA, LS2, LZ1; the L96, LC8, LY6 are iron.
- AFM (cylinder deactivation): yes. Same as the L77, LFA, LZ1; the L96, L98, LC8, LS2, LY6 don't.
- Compression 10.40:1, within the group's 9.6–10.9:1 spread.
- Up to 367 hp from the factory (2nd of the nine 6.0 L Gen IV engines we list; the group tops out at 400 hp).
- Variable valve timing (truck applications only). Also on the L96, LC8, LY6, LZ1.
- Built 2006–2010.
Swapping the L76: what to plan for
- Computer: the L76 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).
- Drive-by-wire throttle. Plan on the pedal and throttle body that match the L76, and a computer that runs drive by wire; the base Holley Terminator X is cable-only (the X Max does drive-by-wire). More: drive-by-wire pinout.
- AFM: a stock-cam L76 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 (truck applications only): on a VVT L76 the cam phaser and VVT timing cover change what bolts on: only some water pumps clear a VVT timing cover, and a non-VVT cam needs a VVT delete and a tune. More: accessory drives.
- From a truck or SUV (Chevrolet Avalanche, Chevrolet Silverado 1500, Chevrolet Suburban 1500, GMC Sierra 1500 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.
- From a Pontiac G8: Corvette accessory spacing, and the G8 pan only fits its original car (avoid it for a swap). More: oil pans.
Refresh parts for the L76
From our Gen IV refresh list, the parts that are specific to the L76. 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 L76 has its knock sensors on the side of the block. |
| GM Gen IV camshaft position sensor 12591720 (58x engines) | 12591720 | 58x L76: the cam sensor lives in the front cover. |
| Chevrolet Performance 58x crankshaft position sensor 12703627 | 12703627 | 58x L76: the crank sensor is behind the starter. |
| GM oil pressure screen/filter 12585328 (AFM valley cover) | 12585328 | On 2007-and-later AFM V8s (check your L76's build year): 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 L76 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 L76, 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 L76'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 L76
Where to find an L76 at the junkyard: 11 vehicle applications below. Confirm it from the RPO sticker in the glovebox or the 8th VIN digit (for the L76: Y).
| Vehicle | Years |
|---|---|
| Chevrolet Avalanche | 2007–2009 |
| Chevrolet Silverado 1500 | 2007–2009 |
| Chevrolet Suburban 1500 | 2007–2009 |
| GMC Sierra 1500 | 2007–2009 |
| GMC Yukon XL | 2007–2009 |
| Holden VE Commodore (automatic only) | 2008–2010 |
| Holden VE Ute (automatic only) | 2008–2010 |
| Holden VZ Commodore – those built from February 2006 until July 2006 (the release of the VE series). | 2006 |
| Holden WL Statesman/Caprice – those built from February 2006 until September 2006 (the release of the WM series). | 2006 |
| Holden WM Statesman/Caprice | 2008–2010 |
| Pontiac G8 GT | 2008–2009 |
Buying a used L76
A used L76 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 L76: Y) before you buy.