* Cab style: Regular cab, extended cab, or crew cab all had different weights.
* Bed length: Short bed, long bed, etc., all affected the overall weight.
* Engine: Different engines added or subtracted weight.
* Options: Features like power options, air conditioning, and added accessories all impacted the weight.
* Payload: The weight of whatever was loaded in the truck is *not* included in the curb weight.
To find a *close* estimate, you'd need to know the specific configuration of the truck (cab style, bed length, engine). Even then, it would only be an approximation. You might find some general weight ranges in a 1989 Chevrolet C1500 brochure or a vehicle specifications guide from that year. Otherwise, you'll have to find information specific to a particular truck based on its VIN.
