Engine:
* Engine Type: 454 cubic inch (7.4L) V8, gasoline. This was likely a small-block variant of the 454, not the larger, rarer big-block found in some earlier years. The specific output (horsepower and torque) varied slightly throughout the model year, typically in the range of 230-250 hp.
* Fuel System: Likely a carburetor, though some late-model 1987s might have had early fuel injection systems.
* Transmission: Most likely a TH400 3-speed automatic, but a manual transmission was a possibility (though less common with the 454). A TH700R4 3-speed automatic overdrive was also possible but less frequent in that era.
Drivetrain:
* Drivetrain: 4-wheel drive (4x4) with a part-time transfer case (likely NP205 or similar).
* Axles: Heavy-duty axles designed for towing and off-road capability (specific axle ratios varied depending on options). Common ratios included 3.73 or 4.10, though others were available.
Chassis & Body:
* Body Style: Full-size, 3-door or 4-door Suburban.
* Frame: Heavy-duty boxed steel frame.
* Suspension: Front: Independent, likely with coil springs. Rear: Solid axle with leaf springs.
* Brakes: Power assisted drum brakes (likely all around, though front discs were an option in some higher trims).
* Steering: Power steering was standard.
Other:
* GVWR (Gross Vehicle Weight Rating): Varied based on trim and options, but likely in the range of 6000-7000 lbs or more.
* Payload Capacity: Also varied considerably depending on the specific model and options.
* Fuel Economy: Very low by modern standards, likely in the range of 8-12 mpg (city) and 10-14 mpg (highway) at best, significantly less with heavy towing.
To find precise specifications for a *specific* 1987 Chevy Suburban 4x4 with a 454:
* Find the VIN (Vehicle Identification Number): This number will allow you to decode the specifications of that particular vehicle through a VIN decoder (many free online options are available).
* Check the original owner's manual (if available): This will list the factory specifications for the truck.
* Look for a build sheet: If the truck's history is well-documented, a build sheet might exist, detailing all the options and specifications.
Keep in mind that 30+ year-old vehicles may have modifications made over time, so even with the VIN, the current specs might not exactly match the original factory specs.
