Engine System Identification

ENGINE SYSTEM IDENTIFICATION

Transmission Identification 4L80-E:

Engine Vin Code ID [1] Z

Engine V6-262/4.3L

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] Computer Command Control (ECM or PCM)

Remarks:

[1] The eighth digit of the VIN denotes engine code.
[2] Transmission application determines computer system.
a. If truck has 4L80-E transmission it has a PCM.
b. Look at pan shape and number of bolts for identification. PCM illustrated