Where is the oil sending unit located on a 2003 Chevy Silverado 1500HD - 6.0 liter engine?

On a 2003 Chevy Silverado 1500HD with the 6.0L engine, the oil pressure sending unit is typically located on the driver's side (left side) of the engine block, near the front. It's usually a relatively small unit with one or two wires connected to it. It's often near the oil filter, but not always directly on top of it.

Because there's some variation depending on specific engine configuration, it's best to:

1. Consult a repair manual: A repair manual specific to your year, make, model, and engine will have a diagram showing the exact location.

2. Use a visual inspection: Once you've located the oil filter, carefully look around that area for a small sensor with wiring. Be cautious when inspecting around hot engine components.

3. Use online resources: Search for images of a "2003 Chevy Silverado 6.0L engine oil pressure sending unit" on sites like Google Images or YouTube. You might find a video showing its location.

Remember to always disconnect the negative battery terminal before working on any electrical components in your vehicle.