* Engine: While it was a diesel, the specific engine (e.g., 6.2L or a different option if any) impacted capacity.
* Axle Ratio: Higher numerical axle ratios (like 4.10 or 4.56) allowed for greater towing capacity.
* Transmission: The type of transmission also influenced the towing capacity.
* Options: Additional options like heavy-duty towing packages could increase the rating.
* GVWR (Gross Vehicle Weight Rating): The weight of the Suburban itself plus its cargo affects what it can safely tow.
To find the accurate towing capacity for *your specific* 1984 Chevy K20 Suburban diesel:
1. Check the owner's manual: This is the most reliable source. The sticker inside the driver's side doorjamb might also list some information but the manual is most definitive.
2. Look for a sticker on the vehicle: Sometimes a towing capacity sticker was placed on the vehicle itself, often near the driver's side doorjamb or in the glove compartment.
3. Contact a Chevrolet dealership: They may have access to historical data on specifications for that model year.
4. Consult a reliable online resource: Websites specializing in vehicle specifications (though accuracy should be independently verified).
Without knowing the specifics of your truck, providing a precise towing capacity is impossible. However, it's safe to assume that a properly equipped 1984 K20 Suburban diesel could tow in the range of 7,000 to 10,000 lbs, but this is a broad estimate and could be significantly higher or lower depending on the factors listed above. Always defer to the information found in your vehicle's documentation.