Where is the ecu located on a 2001 Chevy Tahoe?

The ECU (Engine Control Unit), also sometimes called the PCM (Powertrain Control Module) in GM vehicles, on a 2001 Chevy Tahoe is typically located underneath the dashboard, on the passenger side. However, to be absolutely certain, you should consult your Tahoe's repair manual or a reliable online resource with diagrams specific to that year and model. The exact location can vary slightly depending on trim level and options.