Automatic transmission service, manual transmission service (if applicable), transfer case service, clutch service, torque converter, transmission control module (TCM) diagnostics
Component replacement, accessory installation guidance (where applicable to factory systems)
Diagnostic Procedures:
On-board diagnostics (OBD-II) scanning, sensor testing, actuator testing, system function checks
Technical Depth
Depth Level:
Comprehensive: Covers everything from basic maintenance to full engine and transmission rebuilds, including in-depth electrical diagnostics.
Diagram Quality:
Highly detailed exploded diagrams and pictures
Instruction Style:
Step-by-step instructions
📊 Manual Specifications
File Format
Digital Format:
PDF
Compatibility:
Windows and MAC computers
Print Quality
Printability:
Printable: Single pages or the entire manual
Binding Type
Binding:
N/A (Digital Download)
Paper Type
Paper Type:
N/A (Digital Download)
Licensing
Usage License:
Lifetime use, unlimited installations on multiple devices
Version Type:
Full, unrestricted version
⚙️ Engine Specifications
Primary Engine
Engine Option 1:
4.3L V6 EcoTec3 (LV3)
Engine Option 2:
5.3L V8 EcoTec3 (L83)
Engine Option 3:
6.2L V8 EcoTec3 (L86)
Performance
4.3L V6 Horsepower:
285 hp @ 5600 rpm
4.3L V6 Torque:
305 lb-ft @ 4100 rpm
5.3L V8 Horsepower:
355 hp @ 5600 rpm
5.3L V8 Torque:
383 lb-ft @ 4100 rpm
6.2L V8 Horsepower:
420 hp @ 5600 rpm
6.2L V8 Torque:
460 lb-ft @ 4100 rpm
Fuel System
Fuel Injection:
Direct Injection and Port Injection (DI/PFI)
Fuel Type:
Regular Unleaded Gasoline (E85 compatible for some engines)
Engine Features
Cylinder Deactivation:
Active Fuel Management (AFM) for V8 engines
Valve Train:
Overhead Valve (OHV) with Variable Valve Timing (VVT) on some models
🔧 Transmission
Standard
Transmission Option 1:
6-speed automatic (e.g., 6L80, 6L90)
Optional
Transmission Option 2:
8-speed automatic (RPO: MYB) - Introduced later in the 2015 model year for certain configurations.
Features
Transfer Case:
AutoTrac 4WD (2-speed electronic transfer case with modes: 2HI, 4HI Auto, 4HI Lock, 4LO Lock)
📐 Dimensions
Exterior
Wheelbase Options:
Several options depending on cab and bed configuration (e.g., 143.5 inches, 153.5 inches)
Length Options:
Varies by configuration (e.g., 230 inches for Crew Cab Standard Bed)
Width Options:
Varies by configuration (e.g., 80 inches)
Height Options:
Varies by configuration (e.g., 74.4 inches for Crew Cab 4WD)
Cargo
Bed Length Options:
Short Bed (69.3 in), Standard Bed (78.9 in), Long Bed (98.3 in)
Weights
Curb Weight Range:
Approx. 4,700 - 5,600 lbs (depending on configuration)
Towing Capacity Max:
Up to 12,000 lbs (with specific configurations and trailering packages)
Payload Capacity Max:
Up to 2,270 lbs (with specific configurations)
🛡️ Safety Features
Ratings
NHTSA Overall Rating:
5-Star Overall Safety Rating (for many configurations)
Active Features
Active Safety Features Available:
Forward Collision Alert, Lane Departure Warning, StabiliTrak Stability Control, Trailer Sway Control, Anti-lock Braking System (ABS), Traction Control
Passive Features
Passive Safety Features:
Front airbags, front seat-mounted side-impact airbags, head curtain airbags (front and rear), daytime running lights, rearview camera
💡 Technology Features
Infotainment
Infotainment System:
IntelliLink system with touchscreens (available sizes: 4.2-inch, 7-inch, 8-inch)
Connectivity Options:
Bluetooth for phone and audio streaming, USB ports, auxiliary input jack, available navigation, available 4G LTE Wi-Fi hotspot (introduced in later years, check specific trim for 2014-15 availability).
Driver Assistance
Driver Assistance Technologies:
Available: Lane Departure Warning, Forward Collision Alert, front and rear park assist, rearview camera.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Variable (based on oil life monitor system), typically 7,500 to 10,000 miles for synthetic oil, or as indicated by the vehicle's system.
Engine Air Filter Replacement:
Approximately 45,000 miles or as needed based on driving conditions and inspection.
Cabin Air Filter Replacement:
Approximately 20,000 to 30,000 miles or as needed.
Spark Plug Replacement V8:
Approximately 100,000 miles (Direct Injection engines).
Fluid Specifications
Engine Oil Specification:
SAE 0W-20 (Dexos1 Gen 2 approved synthetic)
Engine Oil Capacity 5.3L:
7.0 quarts (6.6 liters)
Transmission Fluid Specification:
Dexron VI automatic transmission fluid
Coolant Specification:
GM Super Coolant (Green) - P/N 88862061 or equivalent
Brake Fluid Specification:
DOT 3
Known Issues
Common Complaints 2014 2015:
Intermittent electrical gremlins, infotainment system glitches, potential for active fuel management (AFM) lifter noise (less common in the initial K2XX models compared to previous generations, but still a possibility), minor paint imperfections, some reports of HVAC blend door actuator failures.
📚 Vehicle History
Brand Heritage
Gmc Truck Legacy:
GMC (General Motors Company) has a long history of producing trucks, dating back to the early 20th century, often positioned as a premium or professional-grade brand.
Model Evolution
Sierra Lineage:
The Sierra nameplate has been used for GM's full-size trucks since 1999, evolving from the previous C/K platform. The 2014 model year marked a significant redesign with the introduction of the K2XX platform.
Production
Manufacturing Locations:
Fort Wayne, Indiana, USA; Silao, Guanajuato, Mexico
🏆 Awards & Recognition
Recognitions
Truck Of The Year Awards:
The 2014 Sierra and its sibling, the Chevrolet Silverado, received numerous 'Truck of the Year' awards from automotive publications for their redesign and capabilities.
Safety Awards:
Often received high safety ratings from NHTSA and IIHS, contributing to its market appeal.
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