Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1993SUBURBAN 3/4 TON 2WD V8-454 7.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTAPPLICATION AND IDENGINE SYSTEM IDENTIFICATION
1993 Chevrolet Suburban 3/4 Ton 2WD V8-454 7.4L
Engine System Identification
1993 Chevrolet Suburban 3/4 Ton 2WD V8-454 7.4LSECTION Engine System Identification
Engine VIN Code ID [1] K
Engine Displacement 7.4L (454 cid)
Engine Configuration V8
Fuel Control System Throttle Body Fuel Injection
Ignition System Distributor Ignition W/Ignition Control and Knock Sensor(DI-IC-KS)
Computer System [2a] Powertrain Control Module (93PCM6)
Computer System [2b] Engine Control Module (ECM/GMCM)
Remarks:
[1] The eighth digit of the VIN denotes engine code.
[2] Transmission application determines computer system.
a. If vehicle is equipped with a 4L80-E automatic transmission it has
a 93PCM6 computer.
c. If vehicle is equipped with manual transmission it has a
ECM/GMCM computer.
Engine Displacement 7.4L (454 cid)
Engine Configuration V8
Fuel Control System Throttle Body Fuel Injection
Ignition System Distributor Ignition W/Ignition Control and Knock Sensor(DI-IC-KS)
Computer System [2a] Powertrain Control Module (93PCM6)
Computer System [2b] Engine Control Module (ECM/GMCM)
Remarks:
[1] The eighth digit of the VIN denotes engine code.
[2] Transmission application determines computer system.
a. If vehicle is equipped with a 4L80-E automatic transmission it has
a 93PCM6 computer.
c. If vehicle is equipped with manual transmission it has a
ECM/GMCM computer.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.