🏷️ Basic Information Identification Make: Isuzu Model: Ascender Year: 2004 Codes Platform: GMT360 (shared with Chevrolet TrailBlazer, GMC Envoy, Oldsmobile Bravada, Buick Rainier, Saab 9-7X) 👋 Introduction Market Position Segment: Mid-size SUV Competitive Analysis Competitors: Chevrolet TrailBlazer, GMC Envoy, Ford Explorer, Jeep Grand Cherokee, Dodge Durango, Toyota 4Runner. Key Features Platform Sharing: Built on the robust GMT360 platform, sharing significant mechanical and electrical architecture with popular GM SUVs, facilitating parts availability and repair knowledge. Engine Options: Offered with two powerful GM engines: the inline-6 Atlas engine and the Vortec V8 engine. Body Styles: Available in various configurations, including standard wheelbase and extended wheelbase (XL models). 📋 Manual Details Coverage Areas Electrical Systems: Comprehensive coverage of all electrical systems, including powertrain, chassis, body, and comfort features. Page Count Estimated Pages: 800+ Manual Type Type: Electric Wiring Manual Language Language: English Format Format: Digital (typically PDF), potentially printable 📖 Manual Coverage Systems Covered Powertrain Electrical: Engine controls (4.2L LL8/Atlas, 5.3L LM4/Vortec V8), transmission controls (automatic), charging system, ignition system, starting system. Chassis Electrical: Antilock Brake System (ABS), cruise control (4.2L & 5.3L), transfer case control (4WD models), trailer wiring, suspension controls (if applicable). Body Electrical: Body Control Module (BCM) system, door control module system, liftgate module system, power mirrors, power seats, power windows, power door locks, sunroof, interior lights, dash and console lights, memory seats, rear defogger, rear wiper/washer, windshield wiper/washer (variable intermittent). Comfort And Convenience: Air conditioning (automatic & manual), audible warning system, backup lights, blower controls, cigar lighter, auxiliary power outlets, Homelink system, horns, gauges, OnStar system, sound system, Day/Night mirror. Lighting: Headlights, fog lights, brake lights, park/turn/hazard/marker/license lamps, indicators and Driver Information Center (DIC). Safety And Security: Antitheft system, Supplemental Restraint System (SRS) wiring. Procedures Included Diagnostics And Troubleshooting: Detailed wiring diagrams, circuit descriptions, component locations, connector views, and diagnostic procedures for electrical faults. Component Identification: Schematics showing wire colors, gauge sizes, connector pinouts, and component identification for accurate diagnosis and repair. Harness Repair And Routing: Guidance on identifying damaged harness sections, connector repair, and proper harness routing within the vehicle. Diagnostic Flowcharts: Often includes diagnostic flowcharts or decision trees for common electrical problems, guiding technicians through a systematic troubleshooting process. Technical Depth Depth: Highly detailed, suitable for professional technicians and advanced DIY enthusiasts. Covers system architecture, component interconnections, and signal paths. Component Level Detail: Provides wiring schematics for individual components, including fuses, relays, switches, motors, sensors, and control modules, detailing their specific connections and circuit numbers. 📊 Manual Specifications File Format Quality: High-resolution scans or native digital files ensuring clarity of diagrams and text. Searchable text for efficient information retrieval. Searchability: Ensures text is recognized by PDF readers for keyword searches, significantly reducing time spent locating specific wiring diagrams or component information. Print Quality Printability: Designed for clear printing of individual diagrams or sections. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine 4.2L I6: GM Atlas LL8. Displacement: 4.2L (256 cu in). Horsepower: ~275 hp @ 6000 rpm. Torque: ~275 lb-ft @ 4800 rpm. Configuration: Inline-6 DOHC. 5.3L V8: GM Vortec LM4. Displacement: 5.3L (325 cu in). Horsepower: ~290 hp @ 5200 rpm. Torque: ~325 lb-ft @ 4000 rpm. Configuration: V8 OHV with Active Fuel Management (AFM) on some later models, but likely not 2004. Performance Fuel Type: Unleaded Gasoline Fuel System Injection: Sequential Electronic Fuel Injection (SEFI). Ignition System Type: Distributorless Ignition System (DIS) with Coil-on-Plug (COP) ignition. 🔧 Transmission Standard Type: 4-speed automatic transmission (e.g., 4L60-E family). Optional Drive Type: Available in 2WD (RWD) and 4WD configurations. Features Control: Electronically controlled, includes transmission range selection, torque converter clutch (TCC) control, and potentially tow/haul mode. 📐 Dimensions Exterior Wheelbase Standard: ~113 inches Wheelbase Extended Xl: ~129 inches Weights Curb Weight Approx: 4,600 - 5,000 lbs (varies by engine and drivetrain) Towing Capacity Approx: Up to 6,600 lbs (with proper equipment) 🛡️ Safety Features Ratings NHTSA Rollover Resistance: Good (as per NHTSA ratings for GMT360 SUVs) Active Features ABS: Standard Antilock Braking System (ABS) on all wheels. Passive Features Airbags: Frontal airbags for driver and front passenger. Available side-impact airbags. Srs: Supplemental Restraint System (SRS) components, including airbag control module and impact sensors. 💡 Technology Features Infotainment Audio System: Standard AM/FM stereo with CD player. Optional premium sound systems, including Bose. Wiring for speakers, head unit, amplifier, and antenna is covered. Driver Assistance Cruise Control: Electronically controlled cruise control system, with specific wiring for the steering wheel controls and actuator. Connectivity Onstar System: Factory-installed OnStar telematics system, including wiring for voice communication, GPS, and crash notification features. Convenience Homelink: Integrated Homelink garage door opener system, with wiring to the overhead console or mirror assembly. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil type used. Consult manual for...