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.
1981 Chevrolet Step Van P30, 5.7L Eng VIN M, Standard TransFACTORY OEM SERVICE PROCEDURE
General Motors: Notes
COOLING SYSTEM CAPACITIES
| Application | Approximate Capacity(1) | |||||
|---|---|---|---|---|---|---|
| Standard System Manual Transmission | Heavy Duty Radiator | With Air Conditioning | ||||
| 4.1 L (250") | ||||||
| C & K10 | 15 | 15 | 15.5 | |||
| C20 | 15 | 15 | 15.5 | |||
| G10/30 | 17 | 17 | 17 | |||
| 4.8L (292") | ||||||
| C20 | 15 | 15 | 15.5 | |||
| C & K30 | 14 | 14 | 15 | |||
| P10/30 | 13.5 | 13.5 | ..... | |||
| 5.0L (305") | ||||||
| C & K10 | 17.5 | 17.5 | 17.5 | |||
| G10 | 19 | 19 | 20 | |||
| 5.7L (350") | ||||||
| C & K10/30 | 17.5 | 18 | 18 | |||
| P20 | 16.5 | 17 | ..... | |||
| G10/30 | ..... | 20 | 20 | |||
| 6.5 L (400") | ||||||
| K20 | 18 | 19 | 20 | |||
| G20 | 20 | 20 | 20 | |||
| G30 | 21 | 21 | 21 | |||
| 7.4L (454") | ||||||
| C20/30 | 23 | 23 | 24 | |||
| P30 | 24.5 | 24.5 | 24.5 | |||
|
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PRESSURE CAP
| Application | psi; |
|---|---|
| All Models | 15 |
THERMOSTAT
| Application | (1) Rating °F | ||
|---|---|---|---|
| All | 195 | ||
|
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Factory Service Tools
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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.
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