If you're reffering to a full size truck, the ECM is on top of the front driver's side wheel well.
in the engine
remove glove box panel ecm is located behind panel
Owners manual, positive.
You don't. The ECM (Engine Control Module) maintains the correct idle speed. If the idle is out of control you probably have a vacuum leak.
Engine Control Module.............
where is it at
Where is the tcm in a 1994 chevy S10 Blazer
If you mean the Power Control Module, it is located on the passenger side of the engine compartment, along the upper edge of the firewall.
It is built into the engine control computor.
V8
It's part of the ECU(main engine control module) on this model.
It depends on what engine yu have but on a lot of them it is under the coils. If your car has a dist it is inside.