GMC Jimmy 1970-1991 Specifications

The GMC Jimmy (1970-1991) offered several engine options, including the 250 cubic inch inline-6, 305 cubic inch V8, and 350 cubic inch V8. The 250 inline-6 produced 155 horsepower and 235 lb-ft of torque, ideal for light-duty tasks. The 305 V8 delivered 160 horsepower and 235 lb-ft of torque, balancing performance and efficiency. The 350 V8, with 175-210 horsepower and 275-300 lb-ft of torque, was the most powerful, suited for heavy-duty towing and off-road use.

The GMC Jimmy came with a 3-speed manual transmission as standard, with an optional 4-speed manual or 3-speed automatic transmission (Turbo Hydra-Matic 350). The automatic transmission was popular for its smooth shifting and ease of use, especially in urban and off-road conditions.

Standard safety features included seat belts, reinforced steel body construction, and a dual-circuit braking system. Optional features included power brakes, front disc brakes, and a rear-wheel anti-lock braking system (ABS) in later models. Safety was further enhanced by improved visibility and a sturdy roll bar.

The GMC Jimmy's fuel economy ranged from 12-15 mpg in the city and 16-18 mpg on the highway, depending on the engine and transmission. This was competitive with similar SUVs of the era, such as the Ford Bronco and Jeep Cherokee, which averaged 11-14 mpg city and 15-17 mpg highway.

Recommended maintenance includes oil changes every 3,000 miles, tire rotation every 6,000 miles, and a comprehensive inspection every 12,000 miles. The timing belt should be replaced every 60,000 miles, and the transmission fluid every 30,000 miles for optimal performance.

Standard features included a removable hardtop, vinyl upholstery, and manual windows. Optional features included air conditioning, power windows, a premium sound system, and a tilt steering wheel. Off-road packages added skid plates, heavy-duty suspension, and larger tires.

The GMC Jimmy offered 50 cubic feet of cargo space with the rear seats folded, comparable to the Ford Bronco's 48 cubic feet and the Jeep Cherokee's 45 cubic feet. Passenger space was generous, with seating for up to five adults, making it a practical choice for families and adventurers alike.

The GMC Jimmy had a towing capacity of up to 6,000 pounds with the 350 V8 engine and proper towing equipment. Payload capacity ranged from 1,200 to 1,500 pounds, depending on the configuration, making it capable of handling heavy loads and trailers.