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 MANUALSCHEVROLET1994C 2500 SUBURBAN 2WD V8-454 7.4LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINESYSTEM SPECIFICATIONSENGINE CONFIGURATION SPECIFICATIONS
1994 Chevrolet C 2500 Suburban 2WD V8-454 7.4L
Engine Configuration Specifications
1994 Chevrolet C 2500 Suburban 2WD V8-454 7.4LSECTION Engine Configuration Specifications
Engine VIN Code N
Engine 7.4L/V8-454
Fuel System TBI
Bore & Stroke, Inch 4.25 x 4.00
Compression Ratio 7.9
Horsepower @ RPM [11]
Torque, Ft. Lbs. @ RPM [12]
Normal Oil Pressure, psi [05]
TBI Throttle Body Injection.
[05] 10 psi @ 500 RPM minimum; 40-60 psi @ 2000 RPM.
[11] Except SS engine, 230 @ 3600 RPM; SS engine, 255 @ 4000 RPM.
[12] Except SS engine, 385 @ 1600 RPM; SS engine, 405 @ 2400 RPM.
Engine 7.4L/V8-454
Fuel System TBI
Bore & Stroke, Inch 4.25 x 4.00
Compression Ratio 7.9
Horsepower @ RPM [11]
Torque, Ft. Lbs. @ RPM [12]
Normal Oil Pressure, psi [05]
TBI Throttle Body Injection.
[05] 10 psi @ 500 RPM minimum; 40-60 psi @ 2000 RPM.
[11] Except SS engine, 230 @ 3600 RPM; SS engine, 255 @ 4000 RPM.
[12] Except SS engine, 385 @ 1600 RPM; SS engine, 405 @ 2400 RPM.
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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.