The 1991 GMC Jimmy Service and Repair Manual provides comprehensive, vehicle-specific repair information. This manual is identical to what technicians use at dealerships for maintaining, servicing, diagnosing, and repairing your vehicle. It includes detailed, step-by-step instructions, diagrams, illustrations, wiring schematics, and specifications for all aspects of your 1991 GMC Jimmy. You'll find everything you need to repair your vehicle with ease, from routine maintenance to complex repairs.

This manual covers a wide range of topics, including:

* **Maintenance:** Covers all regular maintenance procedures, such as oil changes, filter replacements, and fluid checks.
* **Engine:** Provides information on diagnosing and repairing engine problems, covering components like the cylinder head, crankshaft, and valves.
* **Control System:** Details the workings of the engine control system, including sensors, actuators, and the electronic control unit.
* **Mechanical Systems:** Offers detailed information on the mechanical systems of your Jimmy, including the transmission, drivetrain, suspension, and brakes.
* **Fuel Service Specifications:** Includes all specifications related to fuel systems, such as fuel pressure and injection settings.
* **Emission Control:** Covers the emission control system, including the catalytic converter, exhaust gas recirculation system, and evaporative emissions system.
* **Intake Exhaust Cooling:** Provides information on the intake and exhaust systems, including the air intake manifold, exhaust manifold, and cooling system.
* **Lube:** Details the lubrication system, including the oil pump, oil filter, and oil pan.
* **Ignition Starting Charging:** Covers the ignition system, starting system, and charging system.
* **Auto Transmission Clutch:** Provides information on the automatic transmission, including the clutch system, torque converter, and gear selection.
* **Manual Transmission:** Details the manual transmission, including the gear selection system, clutch system, and shift linkage.
* **Transfer Propeller Shaft:** Covers the transfer case and propeller shafts, including the drive shafts and joints.
* **Drive Shaft:** Provides detailed information on the drive shafts, including the U-joints and constant velocity joints.
* **Differential:** Covers the differential, including the gear set, axle shafts, and limited slip differential.
* **Axle Suspension:** Provides information on the axles and suspension system, including the suspension components, steering components, and shock absorbers.
* **Tire & Wheel:** Covers tire and wheel specifications, as well as tire maintenance and repair.
* **Brake Control:** Details the brake control system, including the hydraulic system, brake booster, and master cylinder.
* **Brake:** Provides information on the braking system, including the calipers, rotors, and pads.
* **Parking Brake:** Covers the parking brake, including the cable, lever, and actuator.
* **Steering Column:** Details the steering column, including the steering wheel, steering shaft, and steering gear.
* **Power Steering:** Covers the power steering system, including the pump, steering rack, and hoses.
* **Air Condition:** Provides information on the air conditioning system, including the compressor, condenser, evaporator, and refrigerant.
* **Suppl Restraint System:** Details the supplemental restraint system, including the airbags and seat belts.
* **Seat Belt:** Covers the seat belts, including the retractors, buckles, and pretensioners.
* **Engine Immobilizer:** Details the engine immobilizer system, including the key transponder and immobilizer module.
* **Cruise Control:** Covers the cruise control system, including the actuator, control unit, and vacuum system.
* **Wiper & Washer:** Provides information on the windshield wipers and washer system, including the motor, linkage, and pump.
* **Door Lock:** Covers the door locks, including the electric locks, manual locks, and actuators.
* **Meter Audio/Visual:** Details the instrument cluster, including the gauges, warning lights, and display screens.
* **Horn:** Covers the horn, including the horn button, horn relay, and horn itself.
* **Windshield/Glass Mirror:** Provides information on the windshield, glass, and mirrors.
* **Instrument Panel:** Covers the instrument panel, including the dashboard, center console, and trim.
* **Seat:** Details the seats, including the seat frames, upholstery, and adjustments.
* **Engine Hood/ Door:** Covers the engine hood and doors, including the latches, hinges, and seals.
* **Exterior & Interior:** Provides details on the exterior and interior of the vehicle, including the body panels, trim, and upholstery.
* **Electrical:** Details the electrical system, including the wiring, fuses, relays, and circuits.
* **Multiplex/ Can Communication:** Covers the multiplex and CAN communication systems, including the data bus and communication protocols.

This manual provides all the information you need to service and repair your 1991 GMC Jimmy, enabling you to save time and money.

The 1991 GMC Jimmy, a compact SUV that embodied the spirit of adventure and practicality, was a popular choice for drivers seeking a capable and stylish vehicle. Built on the same platform as its Chevrolet counterpart, the S-10 Blazer, the Jimmy featured a rugged exterior with sharp lines and a distinctive grille. Its compact size made it maneuverable in tight spaces and easy to park, while its high ground clearance and available four-wheel drive system provided surefootedness on rough terrain. Under the hood, the Jimmy offered a choice of powerful engines, including a 2.8-liter V6 and a 4.3-liter V6, both paired with a smooth-shifting automatic transmission. The interior was designed for comfort and utility, featuring comfortable seating for five passengers and a spacious cargo area. The Jimmy was also equipped with a range of standard and optional features, including air conditioning, power steering, and a cassette player.

Despite its compact size, the 1991 GMC Jimmy was a capable off-roader, and its combination of ruggedness and versatility made it a popular choice for a wide range of drivers. The Jimmy's popularity was also due to its affordability and reliability, making it a practical and enjoyable vehicle to own. The service and repair manual for the 1991 GMC Jimmy, a valuable resource for owners and mechanics, provides detailed information on maintaining and repairing the vehicle. This manual includes comprehensive specifications, diagrams, and troubleshooting guides for all major components, including the engine, transmission, suspension, brakes, electrical system, and bodywork. Whether you're a seasoned mechanic or a DIY enthusiast, the 1991 GMC Jimmy service and repair manual is an indispensable tool for keeping your vehicle running smoothly for years to come.