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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1989SUBURBAN 1/2 TON 2WD V8-454 7.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMAPPLICATION AND ID
1989 Chevrolet Suburban 1/2 Ton 2WD V8-454 7.4L
Ignition System: Application and ID
1989 Chevrolet Suburban 1/2 Ton 2WD V8-454 7.4LSECTION Application and ID
Engine VIN Code ID [1] N
Engine Displacement 7.4L (454 cid)
Engine Configuration V8
Fuel System Throttle Body Injection (TBI) Model 220
Ignition System High Energy Ignition W/Electronic Spark Timing & Electronic Spark Control (HEI-EST-ESC)
Computer System Computer Command Control (ECM)
Remarks:
[1] The eighth digit of the VIN denotes engine code.
NOTE:
Vehicles over 8500 GVW are considered heavy duty.
Vehicles under 8500 GVW are considered light duty.
Engine Displacement 7.4L (454 cid)
Engine Configuration V8
Fuel System Throttle Body Injection (TBI) Model 220
Ignition System High Energy Ignition W/Electronic Spark Timing & Electronic Spark Control (HEI-EST-ESC)
Computer System Computer Command Control (ECM)
Remarks:
[1] The eighth digit of the VIN denotes engine code.
NOTE:
Vehicles over 8500 GVW are considered heavy duty.
Vehicles under 8500 GVW are considered light duty.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.