Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 132 (ENGINE CONTROLS - REMOVAL & INSTALLATION - DIESEL)FUEL SYSTEMSFUEL INJECTORINSTALLATION
2006 Chevrolet Suburban C2500, 6.0 U
Fuel Injector: Installation
2006 Chevrolet Suburban C2500, 6.0 USECTION Installation
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Always install NEW copper gaskets on the fuel injector lines.
- If the injector sleeve was pulled from the cylinder head when removing the injector(s), continue with this step. If the injector sleeve was not pulled from cylinder head, go to step 3. Clean the fuel injector sleeve bore with GM (12377981), or equivalent. Lubricate and install NEW "O" rings onto the fuel injector sleeve.
- Install the fuel injector sleeve onto the Fuel Injector Sleeve Remover/Installer (J 45910). Apply GM Adhesive (U S 12345493 ; 10953488 Canada) or equivalent to the fuel injector sleeve lower sealing area. Install the fuel injector sleeve with J 45910 into the cylinder head. Lightly tap on the J 45910 with a hammer to install and seat the fuel injector sleeve. Remove the J 45910 from the fuel injector sleeve.
- Install the NEW injector(s). Install the retaining bolt on the injector bracket. Tighten the bolt to specification. See TORQUE SPECIFICATIONS . Install the fuel injector return line to the fuel injectors. Tighten the bolts to specification. Install the lower valve rocker arm cover. See VALVE ROCKER ARM COVERS under REMOVAL & INSTALLATION in 6.6L V8 DIESEL ENGINES article. Prime fuel system, if necessary. See FUEL SYSTEM PRIMING .
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.