Target Audience:
DIY enthusiasts, independent repair shops, fleet maintenance personnel
Advantage:
Licensed OE (Original Equipment) data from RepairSurge, offering accuracy and completeness superior to generic manuals. Convenience of digital access and searchability.
Data Source:
Officially licensed, derived from OE materials
Accessibility:
Accessible on PC, laptop, smartphone, tablet via web browser with internet connection
Convenience:
Instant download, no need for physical manuals
Engine Mechanical:
Complete overhaul, troubleshooting, diagnostics, performance tuning for all gasoline engines
Engine Electrical:
Ignition system, fuel injection system (TBI, CPI), starting and charging system, sensors, actuators, PCM diagnostics
Transmission:
Automatic (TH400, 4L60, 4L60E) and manual transmissions: overhaul, diagnostics, service, fluid replacement
Drivetrain:
Four-wheel drive system (NP241), differentials, axle shafts, driveshafts, U-joints
Suspension Steering:
Front and rear suspension components (independent front suspension), steering gearbox, power steering system, alignment specifications
Brakes:
Front disc and rear drum brake systems, ABS (if equipped), hydraulic system diagnostics, component replacement, bleeding procedures
Electrical Body:
Lighting, power windows, power locks, wipers, horn, interior/exterior trim, body panel repair, chassis electrical troubleshooting
HVAC:
Air conditioning system, heater core, blower motor, climate controls, refrigerant handling and service
Maintenance Schedules:
Recommended service intervals for oil changes, filter replacements, fluid checks, tune-ups
Troubleshooting:
Diagnostic flowcharts and step-by-step guides for common and complex issues across all systems
Repair Procedures:
Detailed, illustrated instructions for component replacement, adjustments, and complete system overhauls
Wiring Diagrams:
Comprehensive electrical schematics for all vehicle systems
Diagnostic Capabilities:
Advanced diagnostics covering engine control, ABS, and other electronic systems, including component testing and signal tracing
Rebuild Specifications:
Torque specifications, clearance measurements, and critical data for complete engine and transmission rebuilds
Engine Options:
4.3L V6 (VIN Z), 5.0L V8 (VIN H), 5.7L V8 (VIN K)
Horsepower 4.3L:
Approx. 160 hp @ 4000 rpm (varies slightly by application)
Torque 4.3L:
Approx. 230 lb-ft @ 2000 rpm (varies slightly by application)
Horsepower 5.0L:
Approx. 175 hp @ 4000 rpm
Torque 5.0L:
Approx. 260 lb-ft @ 2400 rpm
Horsepower 5.7L:
Approx. 210 hp @ 4000 rpm
Torque 5.7L:
Approx. 300 lb-ft @ 2400 rpm
Fuel Delivery 4.3L 5.0L:
Throttle Body Injection (TBI)
Fuel Delivery 5.7L:
Central Port Injection (CPI) - also known as CSFI (Central Sequential Fuel Injection)
Recommended Fuel:
Unleaded Gasoline (Octane rating as per owner's manual)
NHTSA Ratings:
N/A (pre-dates standardized NHTSA ratings as we know them today)
ABS:
Anti-lock Braking System (ABS) available as an option, typically on rear wheels or 4-wheel.
Airbags:
Driver-side airbag standard for 1991 model year.
Seatbelts:
Three-point inertia-reel front seat belts
Oil Change Interval:
Every 3,000 - 5,000 miles or 6 months (depending on driving conditions and oil used - consult manual for specific recommendations)
Transmission Fluid Change:
Every 30,000 - 60,000 miles or 2-3 years for automatic transmissions (check fluid level regularly)
Engine Oil Type:
API SG or SH, SAE 5W-30 or 10W-30 (refer to manual for exact recommendations based on engine and temperature)
Coolant Type:
GM specified Type 1 or Type 2 antifreeze (typically ethylene glycol based, 50/50 mix with distilled water)
Power Steering Fluid:
GM Power Steering Fluid or Dexron II/III ATF
Transmission Fluid Type:
Dexron II or Dexron III Automatic Transmission Fluid (ATF)
Common Problems:
CPI spider injector leaks/failures (5.7L), intake manifold gasket leaks, fuel pump issues, worn U-joints, radiator leaks, rear main seal leaks, brake component wear.
Electrical Gremlins:
Grounding issues, corroded connectors, and failing relays can cause intermittent electrical problems.
Chevrolet Trucks:
Chevrolet has a long-standing legacy in the pickup truck market, dating back to the Task Force and Apache series.
Gmt400 Introduction:
The 1988 model year marked the introduction of the GMT400 platform, which replaced the C/K (Round Body) generation. The K1500 signifies the 4WD, half-ton variant. The 1991 model received various refinements and updates on this new platform.
Manufacturing Locations:
Assembled in various GM plants across North America, including Fort Wayne, Indiana and Oshawa, Ontario.
