Were is the Oil pressure sending unit on a 2004 Chevrolet avalanche?
The oil pressure sending unit on a 2004 Chevrolet Avalanche is located on the driver's side (left side) of the engine block. It's usually near the oil filter, but its exact position might vary slightly depending on the engine (4.8L, 5.3L, or 6.0L). You'll likely need to consult a repair manual or a diagram specific to your Avalanche's engine to pinpoint it precisely. The sending unit is a small, typically one-wire sensor.