Description
Remanufactured GM Chevrolet 4.2L Cylinder Head – 2006-2008
Professional Grade OEM Replacement For GM 4.2L Inline-6 Engines
This is a premium remanufactured cylinder head for 2006–2008 GM 4.2L engines, engineered to restore factory performance and reliability. Each unit is precision-machined to meet or exceed original equipment specifications, ensuring a durable and seamless direct-fit solution.
🛠️ In-House Machining Process
- Cleaning: Fully disassembled and thermally cleaned.
- Soda Blasted: Castings are blasted with Sodium Bicarbonate. Because baking soda is water-soluble, there is zero risk of abrasive media clogging oil passages.
- Pressure Testing: Tested to 60 PSI to ensure no cracks or porosity leaks.
- Surfacing: All heads are resurfaced on our Rottler S85A for a precision gasket-sealing surface.
- Valve Job: Multi-angle valve job performed; every port is Vacuum Tested to ensure valves are seated 100% airtight.
📊 Technical Specifications
- Engine Size: 4.2L Inline-6
- Material: Aluminum
- Condition: Remanufactured
- Years: 2006–2008
- Core Return Required
🚛 Fitment Data
Common Applications:
- Chevrolet TrailBlazer: 2006–2008 Chevrolet TrailBlazer (4.2L)
- Chevrolet TrailBlazer EXT: 2006 Chevrolet TrailBlazer EXT (4.2L)
- Buick Rainier: 2006–2007 Buick Rainier (4.2L)
- GMC Truck Envoy: 2006–2008 GMC Truck Envoy (4.2L)
- GMC Truck Envoy XL: 2006 GMC Truck Envoy XL (4.2L)
- Isuzu Ascender: 2007–2008 Isuzu Ascender (4.2L)
[+] Click to View Full Detailed Fitment List
2006 Chevrolet TrailBlazer 4.2L
2007 Chevrolet TrailBlazer 4.2L
2008 Chevrolet TrailBlazer 4.2L
2006 Chevrolet TrailBlazer EXT 4.2L
2006 Buick Rainier 4.2L
2007 Buick Rainier 4.2L
2006 GMC Truck Envoy 4.2L
2007 GMC Truck Envoy 4.2L
2008 GMC Truck Envoy 4.2L
2006 GMC Truck Envoy XL 4.2L
2007 Isuzu Ascender 4.2L
2008 Isuzu Ascender 4.2L
2007 Chevrolet TrailBlazer 4.2L
2008 Chevrolet TrailBlazer 4.2L
2006 Chevrolet TrailBlazer EXT 4.2L
2006 Buick Rainier 4.2L
2007 Buick Rainier 4.2L
2006 GMC Truck Envoy 4.2L
2007 GMC Truck Envoy 4.2L
2008 GMC Truck Envoy 4.2L
2006 GMC Truck Envoy XL 4.2L
2007 Isuzu Ascender 4.2L
2008 Isuzu Ascender 4.2L
📦 Core Return & Warranty
- Core Process: No upfront core fee. Receive your new heads and compare them to your originals before installation. Once complete, use the pre-paid return label included in your shipment. Cores must be returned within 30 days. Click here for Core Policy.
- Warranty: Includes a 2-Year Unlimited Mileage Warranty. Click here for Warranty details.
- Please Note: Parts, marine, and performance items carry specific warranty limitations — please review our full Warranty Policy for details.
