GMC Jimmy 1995-2001 4.3L Engine Specifications
Explore detailed 4.3L engine specifications for the 1995-2001 GMC Jimmy. This guide covers performance, maintenance, and repair insights, making it essential for mechanics and owners.
Overview Specifications
This document provides detailed specifications and technical information about the 4.3L engine used in the 1995-2001 GMC Jimmy. It is designed for enthusiasts, mechanics, and owners seeking comprehensive data on engine performance, design, and maintenance. Use the search and navigation instructions to locate specific details quickly. The document is divided into major sections covering engine design, performance, and maintenance, with subsections offering in-depth technical points.
How to Use
Use the search bar to enter keywords like 'horsepower' or 'torque' to find specific details. The search function highlights relevant sections and subsections for quick access.
Click on the section titles in the table of contents to jump directly to that part of the document. Subsections are listed under each major section for easy browsing.
Key Specifications
Displacement
4.3L (262 cubic inches)
Horsepower
195 hp @ 4500 rpm
Torque
260 lb-ft @ 3600 rpm
Fuel Efficiency
15 city / 20 highway mpg
Compression Ratio
9.1:1
Available Specifications
Engine Design
This section covers the fundamental design aspects of the 4.3L engine, including its configuration, materials, and key components. It provides insights into the engineering choices that contribute to the engine's reliability and performance.
Engine Design
This section covers the fundamental design aspects of the 4.3L engine, including its configuration, materials, and key components. It provides insights into the engineering choices that contribute to the engine's reliability and performance.
Engine Configuration
- V6 engine with a 90-degree bank angle
- Displacement of 4.3 liters (262 cubic inches)
- Overhead valve (OHV) design
- Cast iron engine block
- Aluminum cylinder heads
- Sequential fuel injection system
Key Components
- Forged steel crankshaft
- Powdered metal connecting rods
- Hydraulic roller lifters
- High-flow intake manifold
- Dual exhaust system
- Electronic throttle control
Performance Specifications
This section details the performance metrics of the 4.3L engine, including horsepower, torque, and fuel efficiency. It also covers the engine's capabilities under different driving conditions.
Performance Specifications
This section details the performance metrics of the 4.3L engine, including horsepower, torque, and fuel efficiency. It also covers the engine's capabilities under different driving conditions.
Power Output
- 195 horsepower at 4500 rpm
- 260 lb-ft of torque at 3600 rpm
- Compression ratio of 9.1:1
- Redline at 5000 rpm
- Peak efficiency at 2000-4000 rpm
- Designed for both city and highway driving
Fuel Efficiency
- EPA-estimated 15 mpg city
- EPA-estimated 20 mpg highway
- Optimized for regular unleaded fuel
- Electronic spark timing for efficiency
- Low emissions design
- Compliant with 1995-2001 emissions standards
Maintenance and Durability
This section provides guidelines for maintaining the 4.3L engine, including recommended service intervals, common issues, and tips for ensuring long-term durability.
Maintenance and Durability
This section provides guidelines for maintaining the 4.3L engine, including recommended service intervals, common issues, and tips for ensuring long-term durability.
Service Intervals
- Oil change every 3,000-5,000 miles
- Replace spark plugs every 30,000 miles
- Inspect timing chain every 60,000 miles
- Flush coolant every 50,000 miles
- Check and replace air filter annually
- Inspect fuel injectors every 75,000 miles
Common Issues
- Intake manifold gasket leaks
- Throttle body carbon buildup
- Ignition module failures
- Exhaust manifold cracks
- Fuel pump reliability concerns
- Oil pressure sensor malfunctions
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Engine Specifications
Overview
- Type
- V6
- Configuration
- 60-degree V6
- Platform
- GM Vortec 4300
- Material
- Cast iron block and cylinder heads
- Location
- Front, longitudinal
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 26.7 inches (678 mm)
- Height
- 27.3 inches (693 mm)
- Weight
- 450 lbs (204 kg)
- Displacement
- 262.5 cubic inches (4.3 liters)
- Bore
- 4.0 inches (101.6 mm)
- Stroke
- 3.48 inches (88.4 mm)
- Compression Ratio
- 9.2:1
Materials
- Block
- Cast iron
- Cylinder Heads
- Cast iron
- Pistons
- Aluminum alloy
- Crankshaft
- Forged steel
- Valves
- Stainless steel
Features
- Fuel System
-
- Sequential fuel injection
- Electronic throttle control
- Returnless fuel system
- Ignition System
-
- Distributorless ignition
- Coil-on-plug design
- Electronic spark timing
- Cooling System
-
- Pressurized coolant system
- High-capacity radiator
- Electric cooling fan
- Lubrication System
-
- Full-pressure oil system
- Oil cooler
- High-capacity oil pump
- Emissions Control
-
- Catalytic converter
- EGR system
- PCV system
Safety Features
- Engine Protection
-
- Low oil pressure shutdown
- Overheat protection
- Knock sensor
- Emissions Compliance
-
- OBD-II compliant
- Evaporative emissions control
Comfort Features
- Noise Reduction
-
- Balanced rotating assembly
- Acoustic engine cover
- Hydraulic engine mounts
- Vibration Control
-
- Counter-rotating balance shaft
- Rubber-isolated accessories
Accessories
- Belts And Pulleys
-
- Serpentine belt
- Tensioner pulley
- Idler pulley
- Hoses And Clamps
-
- Radiator hoses
- Heater hoses
- Clamps
- Filters
-
- Oil filter
- Air filter
- Fuel filter
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Oil and filter change
- Air filter inspection
- Spark plug replacement
- Coolant flush
- Fuel system cleaning
- Maintenance Notes
- Use only GM-approved fluids and filters for optimal performance.
Warranty
- Basic Warranty
- Miles: 36,000Years: 3Coverage: Bumper-to-bumper
- Powertrain Warranty
- Miles: 60,000Years: 5Coverage: Engine and transmission
- Emissions Warranty
- Miles: 50,000Years: 4Coverage: Catalytic converter and sensors
- Corrosion Warranty
- Miles: 100,000Years: 6Coverage: Perforation only
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Casting
- Machining
- Assembly
- Testing
- Quality Control
- inspection: 100% inspection of critical componentsTesting: Dyno testing for performance and emissions
- Sustainability Practices
-
- Recycling of scrap metal
- Use of low-VOC paints
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 500Defect Rate: 0.1%Energy Usage: 10 kWh per engine
Service Information for 4.3l engine Service
Maintenance and service requirements specific to this component
- Oil and filter change
- Inspect air filter
- Check spark plugs
- Inspect belts and hoses
- Check coolant level
Use synthetic oil for extended intervals.
- Replace air filter
- Replace fuel filter
- Inspect ignition system
- Check PCV valve
- Inspect cooling system
Replace coolant every 30,000 miles.
- Replace timing chain
- Replace water pump
- Replace spark plugs and wires
- Inspect and clean fuel injectors
- Perform compression test
Major service interval requires specialized tools.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 4.3L engine compatible with other GMC models from 1995-2001?
Is the 4.3L engine compatible with other GMC models from 1995-2001?
The 4.3L V6 engine used in the 1995-2001 GMC Jimmy is compatible with several other GM models from the same era, including the Chevrolet S-10 and Blazer. This engine, known as the Vortec 4300, shares components with other GM vehicles, but specific compatibility depends on the transmission, mounting points, and electrical systems. Always verify with a service manual or dealer for exact fitment.
Q2 What are the maintenance requirements for the 4.3L engine?
What are the maintenance requirements for the 4.3L engine?
The 4.3L engine requires regular maintenance to ensure longevity. Oil changes should be performed every 3,000 to 5,000 miles using 5W-30 or 10W-30 oil. The coolant should be flushed every 30,000 miles, and the spark plugs and wires replaced every 60,000 miles. Air and fuel filters should be checked and replaced as needed. Regular inspection of belts, hoses, and the ignition system is also recommended.
Q3 How do I replace the 4.3L engine in a GMC Jimmy?
How do I replace the 4.3L engine in a GMC Jimmy?
Replacing the 4.3L engine involves several steps: disconnect the battery, drain fluids, and remove components like the air intake, exhaust manifold, and transmission. Use an engine hoist to lift the engine out of the vehicle. Install the new engine by reversing the process, ensuring proper alignment of the transmission and mounts. Torque all bolts to manufacturer specifications and reconnect all electrical and fuel lines.
Q4 What should I do if my 4.3L engine is overheating?
What should I do if my 4.3L engine is overheating?
If your 4.3L engine is overheating, first check the coolant level and inspect for leaks. Ensure the radiator fan is functioning and the thermostat is not stuck. A clogged radiator or water pump failure could also cause overheating. If the issue persists, perform a compression test to check for internal engine damage. Always address overheating issues promptly to prevent further damage.
Q5 How can I optimize the performance of my 4.3L engine?
How can I optimize the performance of my 4.3L engine?
To optimize performance, consider upgrading the air intake and exhaust systems for better airflow. Use high-quality synthetic oil and ensure the ignition system is in top condition. Regular tune-ups, including spark plug and fuel filter replacements, can improve efficiency. For advanced performance, consider reprogramming the ECM or installing performance chips, but consult a professional for compatibility and tuning.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1995-2001 GMC Jimmy Service Manual
Coming SoonThis manual provides detailed instructions for maintenance, repair, and troubleshooting of the 4.3L engine and other components in the GMC Jimmy.
Technical Service Bulletin for 4.3L Engine Updates
Coming SoonThis bulletin outlines known issues, recalls, and updates for the 4.3L engine used in GM vehicles from 1995-2001.
GMC Jimmy Parts and Accessories Catalog
Coming SoonA comprehensive guide to OEM and aftermarket parts and accessories for the 1995-2001 GMC Jimmy, including engine components.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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