Engine System Identification

Transmission Identification 4L80-E:

Engine VIN Code ID [1] N

Engine Displacement 7.4L (350 cid)

Engine Configuration V8

Fuel Control System Throttle Body Fuel Injection

Ignition System High Energy Ignition W/Electronic Spark Timing & Electronic Spark Control (HEI-EST-ESC)

Computer System [2] Engine Control Module (ECM)

Computer System [2] Powertrain Control Module (PCM)


Remarks:

[1] The eighth digit of the VIN denotes engine code.
[2] Transmission application determines computer system.
a. If truck has 4L80E transmission it has a PCM.
b. Look at pan shape and number of bolts for identification.