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The camshaft position sensor for the 2007 Chevrolet Silverado with a 5.3L engine is found on the left side of the engine block under a cover. Removing the sensor requires taking apart a significant portion of the engine cover and associated hardware. If you plan to replace the sensor yourself, it typically costs between $35 and $55, depending on the brand. Hiring a mechanic for the job will run you about $200 to $275, covering both parts and labor. A professional typically takes around 3 to 4 hours to complete the task, meaning most DIYers can expect to spend an entire afternoon, or possibly longer, on the swap.
Check the rear of the valve cover on the right side of the engine to find where the camshaft position sensor is located.
What happens if a component of the sensor becomes lodged inside?
How about this: "Oil with a viscosity rating of 5w30.