Positioning:
Essential resource for owners and independent repair facilities
Target Audience:
DIY enthusiasts, professional mechanics
Advantage:
Officially licensed, OE derived, convenient online access vs. outdated print manuals
Feature 1:
Instant access to critical repair data
Feature 2:
Cost savings through DIY repairs
Feature 3:
User-friendly interface across multiple devices
Primary Coverage:
Comprehensive Service and Repair
Secondary Coverage:
Maintenance, Diagnostics, Troubleshooting
Estimated Page Count:
Thousands (Digital Format)
Type:
Online Service and Repair Manual Software
Format:
Web-based/Online Access (with offline viewing capabilities potentially)
Access Duration:
1 Year Subscription
Device Compatibility:
PC, Laptop, Smartphone, Tablet
Engine Mechanical:
Yes (Internal components, timing, valve train, cooling, lubrication)
Engine Performance:
Yes (Fuel delivery, ignition, emissions control)
Transmission Manual:
Yes (Operation, overhaul, adjustments)
Transmission Automatic:
Yes (Operation, overhaul, adjustments)
Drivetrain:
Yes (Driveshafts, axles, differentials, transfer case if applicable)
Suspension:
Yes (Front and rear suspension components, alignment)
Steering:
Yes (Steering gear, linkage, power steering system)
Brakes:
Yes (Hydraulic system, ABS if equipped, components, adjustments)
Electrical System:
Yes (Charging, starting, lighting, accessories)
Wiring Diagrams:
Yes (Comprehensive schematics)
Heating And Air Conditioning:
Yes (HVAC system diagnosis and repair)
Body And Frame:
Yes (Body panels, interior trim, frame repair)
Interior Components:
Yes (Seats, dashboard, door panels)
Scheduled Maintenance:
Yes (Fluid changes, filter replacements, inspections)
Component Removal And Installation:
Yes (Detailed step-by-step guides)
Diagnostic Procedures:
Yes (Troubleshooting guides based on symptoms)
Torque Specifications:
Yes (Crucial for proper assembly)
Special Tool Requirements:
Yes (Identifies necessary or recommended tools)
Engine Rebuild:
Yes (Detailed instructions for overhaul)
Transmission Rebuild:
Yes (Detailed instructions for overhaul)
Brake System Repair:
Yes (Servicing calipers, drums, lines, bleeding)
Electrical Troubleshooting:
Yes (Using wiring diagrams to diagnose faults)
Depth:
Factory-Level Detail
Detail Level:
Comprehensive diagnostics, adjustments, repairs, and rebuilds
Engine Options:
4.3L V6 (VIN B), 5.7L V8 (VIN R), 7.4L V8 (VIN K)
4.3L V6 Specs:
Engine Code: LB4, Displacement: 262 cu in (4.3 L), Fuel System: Throttle Body Injection (TBI)
5.7L V8 Specs:
Engine Code: L05, Displacement: 350 cu in (5.7 L), Fuel System: Throttle Body Injection (TBI)
7.4L V8 Specs:
Engine Code: L19, Displacement: 454 cu in (7.4 L), Fuel System: Throttle Body Injection (TBI)
Typical Hp 4.3L:
~160 hp @ 4000 rpm
Typical Torque 4.3L:
~230 lb-ft @ 2400 rpm
Typical Hp 5.7L:
~210 hp @ 4000 rpm
Typical Torque 5.7L:
~300 lb-ft @ 2400 rpm
Typical Hp 7.4L:
~230 hp @ 3600 rpm
Typical Torque 7.4L:
~385 lb-ft @ 2400 rpm
Fuel Injection Type:
Throttle Body Injection (TBI) for all engines
Standard Transmission:
4-speed Manual (NV4500 available on some models, but 4-speed auto more common)
Optional Transmission:
4-speed Automatic (700R4 / 4L60, 4L80-E on heavier duty models)
Transmission Fluid Type Auto:
Dexron III (or equivalent)
Transmission Fluid Capacity Auto:
~11-13 quarts (varies by model and transmission)
Infotainment Features:
Basic AM/FM radio with cassette player. Optional premium audio systems available.
Driver Assistance Features:
ABS (Anti-lock Braking System) typically on rear wheels for 2WD, front wheels for 4WD, and all wheels on heavy-duty models.
Connectivity Features:
N/A (No modern connectivity features like Bluetooth or USB)
Oil Change Interval:
Every 3,000-5,000 miles or 3-6 months (depending on driving conditions and oil used)
Air Filter Replacement:
Every 15,000-30,000 miles or as needed based on inspection
Spark Plug Replacement:
Approximately every 30,000-60,000 miles (varies by plug type)
Engine Oil Type:
API SF or SG, SAE 10W-30 recommended for most conditions (check manual for specifics)
Coolant Type:
Ethylene Glycol based, typically a green conventional coolant (GM specification)
Common Issue 1:
Throttle Body Injection (TBI) system can be prone to clogging or sensor failures.
Common Issue 2:
Exhaust manifold leaks (cracked manifolds) are not uncommon on the V8 engines.
Common Issue 3:
Transmission cooler lines can corrode and leak.
Common Issue 4:
Body rust, especially in areas exposed to road salt, is a common concern for older GMT400 trucks.
Gmc Legacy:
GMC has a long history of producing reliable commercial and heavy-duty vehicles.
C Series Lineage:
The C/K series trucks were a staple for GMC and Chevrolet, evolving through multiple generations.
Gmt400 Significance:
The GMT400 platform introduced a more aerodynamic and refined design, significant chassis improvements, and advanced (for the time) fuel injection.
Production Plant:
Multiple GM assembly plants in North America
