05-07 Silverado Sierra 1500 L33 799 Cathedral Port Cylinder Heads Pair 3942
05-07 Silverado Sierra 1500 L33 799 Cathedral Port Cylinder Heads Pair 3942
Item Details
VIN must be 17 characters and cannot contain I, O, or Q.
Item Description
05-07 Silverado Sierra 1500 L33 799 Cathedral Port Cylinder Heads Pair 3942
Pair of 799 cylinder heads from a 2006 Silverado 1500 5.3L L33. These heads were carefully removed from a running and driving vehicle. The aluminum surfaces have some minor corrosion and average wear and marks from use, but are in good condition overall. There are no visible cracks or broken exhaust manifold bolts. All threaded holes and mounting points are intact and undamaged. The rocker arms and stands are included. These are considered by many to be the best factory cathedral port heads ever offered by GM. As with any engine parts we sell, we recommend having these checked by a machine shop prior to use, as they may need resurfacing or other repairs. The images are of the actual items you will receive.
Fits the following models with 5.3L Flex Fuel L33 engine as a direct replacement:
• 2005-2006 Chevrolet Silverado 1500
• 2007 Chevrolet Silverado 1500 Classic
• 2005-2006 GMC Sierra 1500
• 2007 GMC Sierra 1500 Classic
These cylinders heads may also fit other GM Gen III and IV LS 4.8L, 5.3L, 5.7L and 6.0L engines.
These heads are directly interchangeable with 243 casting number heads.
No shipping outside the lower 48 states. No. P.O. Boxes.
Importapart is an auto recycler based in Hazelwood, Missouri. Every part we sell is a real, inspected OEM piece pulled from our own inventory — no aftermarket guesswork.
Questions on fitment or availability? Email Importapartsales@gmail.com or reach us through our contact page and we’ll get back to you within one to two business days. Hours are Mon–Fri, 9am–5pm CST.
We accept all major credit and debit cards and the other payment methods shown at checkout, processed securely through Shopify. Payment is due in full at the time of purchase, and sales tax is applied where required.
For programmed ECU/ECM/PCM orders, be sure to submit your VIN, odometer reading, and current part number at checkout so we can program the unit before it ships.
We ship to all 50 states. Most orders leave our Hazelwood, MO shop within 1–2 business days by FedEx, UPS, or USPS, and you’ll get tracking by email as soon as it’s on the way.
Heavy items like engines, transmissions, and body panels may ship freight — we note that on the listing when it applies. Alaska and Hawaii have a flat-rate surcharge calculated at checkout. We don’t ship to PO Boxes or outside the U.S.
Local pickup is available at our Hazelwood facility by appointment — call ahead to set a time.
Returns are accepted within 60 days. A 20% restocking fee applies to standard returns, but it’s waived if we sent the wrong part, it arrived damaged, or it’s verified defective. Inspect your order on arrival and contact us within 7 days in those cases — we cover return shipping.
Programmed ECU/ECM/PCM modules are returnable only if defective, damaged, or incorrect. Because each one is programmed to the VIN you provide, we can’t take them back for compatibility issues from an incorrect VIN, odometer, or part number — double-check before you order.
Approved refunds are issued to your original payment method within 10 business days.
Every part carries a 60-day limited warranty against defects from the date it’s delivered. It covers manufacturing defects, parts that fail to function as described, and internal mechanical or electrical failure under normal use.
Not covered: damage from improper installation, accident, misuse, or modification; normal wear and tear; labor, towing, or rental costs; racing, off-road, or commercial use unless stated; and items with broken warranty seals.
To file a claim, email Importapartsales@gmail.com with your order number, a description of the problem, and photos or video if possible. We’ll respond within one business day.
Compatible Vehicles
| Notes | Make | Model | Year | Trim | Engine |
|---|---|---|---|---|---|
| Chevrolet | silverado 1500 classic | 2007 | ls crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | ls extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | ls standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | lt crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | lt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | lt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | wt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 classic | 2007 | wt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | sl crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | sl extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | sl standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | sle crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | sle extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | sle standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | wt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 classic | 2007 | wt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | ls crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | ls extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | ls standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | lt crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | lt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | lt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | wt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2006 | wt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | sl crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | sl extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | sl standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | sle crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | sle extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | sle standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | slt crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | slt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | wt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2006 | wt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | base extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | base standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | ls crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | ls extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | ls standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | lt crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Chevrolet | silverado 1500 | 2005 | lt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | base extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | base standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | sle crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | sle extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | sle standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | slt crew cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | slt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | wt extended cab pickup 4-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated | |
| Gmc | sierra 1500 | 2005 | wt standard cab pickup 2-door | 5.3l 5328cc 325cu. in. v8 flex ohv naturally aspirated |