Where is the ECU fuse on 2004 gmc envoy?

The ECU fuse for a 2004 GMC Envoy is located in the under-hood fuse box. To access it, open the hood and find the fuse box on the driver's side near the firewall. The fuse box cover will have a diagram indicating the specific fuse for the ECU, often labeled as "ECM" or "Engine Control Module." Make sure to check the fuse and replace it if it's blown.