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.
2007 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Timing Component Alignment Marks: Locations
Important:
^ Properly locate the camshaft sprocket locating pin with the camshaft sprocket alignment hole.
^ The sprocket teeth and timing chain must mesh.
^ The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.
Locate the camshaft sprocket alignment mark in the 6 o'clock position.
Install the camshaft sprocket and timing chain.
^ If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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