How much does a 1990 Dodge 250 truck with cummins diesel weigh empty?

The weight of a 1990 Dodge 250 with a Cummins diesel engine will vary depending on several factors including the specific model (regular cab, extended cab, etc.), options (e.g., air conditioning), and the exact configuration of the truck. There isn't a single definitive answer.

However, a reasonable estimate for the curb weight (empty weight) would be in the range of 5,000 to 6,000 pounds. This is just an approximation, and the actual weight could be slightly higher or lower. To find the exact weight for a specific truck, you would need to consult its original owner's manual or a vehicle identification number (VIN) lookup service that provides detailed specifications.