





⚡ Unlock your GM’s true potential with precision control
The 12653998 Engine Control Module Assembly is a GM Genuine OE replacement part engineered to regulate your vehicle’s engine systems with precision. Manufactured to exact GM specifications, it requires professional programming to ensure seamless integration and optimal performance, making it the trusted choice for maintaining your GM vehicle’s factory-level reliability and efficiency.





| Manufacturer | ACDelco |
| Brand | GM Genuine Parts |
| Model | 12653998 |
| Item Weight | 3.26 pounds |
| Product Dimensions | 12.75 x 8.25 x 4.25 inches |
| Item model number | 12653998 |
| Exterior | Machined |
| Manufacturer Part Number | 12653998 |
| OEM Part Number | 12653998 |
R**L
El producto fue muy bueno
Fue fácil de instalar y se pudo programar bien
E**A
OEM
Replacing this ECM fixed the short through it (no start; P1682; when engine controls ignition relay was closed, ECM fuse popped). Requires programming with J2534 interface (eg VXDiag) and ACDelco TDS SPS (currently $40/VIN/2 years).
A**H
This part did not work. The mechanic replaced the ...
This part did not work. The mechanic replaced the old ECM with this one and my engine wouldn't even turn on. When they put my old ECM back in the engine turned on. I believe this part was defective and I'm returning it.
D**.
I am glad I was able to find this part
I like it
M**
Es funcional pero no quedo con una luz de seguridad
Al programar la computadora no se pudo porgrmar la llave hasta realizar un bypass y quedó permanente la luz de seguridad encendida, es lo único mal. Pero es funcional la computadora, no es grato con una luz, no es como lo esperaba al comprar este producto.
E**O
It works perfect after a week installed
It works perfect after a week installed, the package from the seller was a little poor,didn't like it, but is working properly wich is the most important to me
L**R
Works great, but has stipulations
It is working great. Had to take it to a mechanic to program it.
A**N
Needs to be programmed by dealer
Won’t work without being programmed
Trustpilot
1 month ago
3 weeks ago
1 day ago
3 days ago