The body control module is typically the electrical lifeblood of the vehicle, and the 2004 GMC Envoy is no exception. It has a vast number of functions, which means there are a vast number of things that can go wrong with it. It's important to know what You're looking at and looking for when You begin playing with it -- it's not an inexpensive part, so You want to take care that You don't damage it. With that said, You can find it under the rear seat on the passenger's side. It will be located on top of a fuse block, accessible through an access panel. Be careful not to damage any components or wires when You're gaining access; this can make Your problems more severe.
My ac pump and fan stopped working at the same time what could it be
Jennifer G
July 16, 2020
The body control module, or the bcm, on the 2004 gmc envoy is located under the dashboard on the driver side towards the center of the vehicle.
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