2015 GMC Sierra Service and Repair Manual

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Factory-Grade Data

2015 GMC Sierra service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • SLT Crew Cab Pickup 4-Door
  • All Terrain Crew Cab Pickup 4-Door
  • Denali Crew Cab Pickup 4-Door
  • All Terrain Standard Cab Pickup 2-Door
  • SLE Crew Cab Pickup 4-Door
  • SLE Standard Cab Pickup 2-Door

Engines covered

  • 5.3L 5328CC 325Cu. In. V8 FLEX OHV Naturally Aspirated
  • 6.2L 6162CC 376Cu. In. V8 FLEX OHV Naturally Aspirated
  • 6.2L 6162CC 376Cu. In. V8 GAS OHV Naturally Aspirated
  • 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2015 GMC Sierra Recalls & Complaints

NHTSA #14V00700013/01/2014Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

General Motors is recalling certain 2014 model year Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles, and 2015 model year Cadillac Escalade and Escalade ESV; Chevrolet Silverado HD; and GMC Sierr

Consequence

The overheated exhaust components may melt nearby plastic parts and may result in an engine fire.

Remedy

General Motors will notify owners, and dealers will reprogram the engine control module, free of cha

NHTSA #15V64000009/10/2015Component: ELECTRICAL SYSTEM:IGNITION

General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Silverado and GMC Sierra trucks manufactured January 24, 2014, to February 26, 2014, 2015 Chevrolet Suburban vehicles manufa

Consequence

If stuck in the "Start" position, the ignition may suddenly snap back into the "Accessory" position,

Remedy

GM will notify owners, and dealers will replace the ignition lock housing, free of charge. The rec

TSB #10134598

This preliminary informational bulletin contains recommendations of what needs to be done to swap/install camper outside rearview mirrors on a vehicle not originally equipped with them.

TSB #10116879

This technical bulletin provides a procedure to replace the driver or passenger seat retractor side belt for vehicles with the condition of oversized and or stripped seat belt retractor bolts

TSB #10114597

This Preliminary Information communication provides information to the technician of an engine power reduced message on the driver information center after performing the Canada Onstar 4G upgrade. If the concern is present park the vehicle

TSB #10114470

This Preliminary Information communication provides information to the technician about vehicle that may have an OnStar system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Tech

TSB #10114408

This Preliminary Information communication provides information to the technician about vehicles that are travelling from Canada to the United States. While in the United States they are unable to receive Turn-by-Turn directions. Due to the

TSB #10114431

This Preliminary Information communication provides information to the technician about vehicles that may have an issue when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone cont

TSB #10114342

This Preliminary Information communication provides information to the technician about vehicle that may have an OnStar system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Tech

TSB #10114352

This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed fo

Showing the 8 most recent of 181 technical service bulletins on file with NHTSA.

20160301Component: POWER TRAINCrash reported1 injured

DRIVING NORTH ON THE GARDEN STATE PARKWAY IN THE CENTER LANE IT FELT LIKE I HAD A BACK TIRE BLOWOUT BUT WHAT HAPPENED WAS MY REAR AXLE BROKE CAUSING MY VEHICLE TO BE EXTREMELY HARD TO CONTROL. I WAS

20230105Component: SERVICE BRAKESCrash reported

The contact owns a 2015 GMC Sierra 1500. The contact stated her husband was driving when the vehicle in front of them applied the brakes unexpectedly, the driver depressed the brake pedal but failed t

20150922Component: AIR BAGSCrash reported

TL* 2015 GMC SIERRA. WHILE THE VEHICLE WAS PARKED, IT BEGAN TO COAST BACKWARDS AND COLLIDED INTO THE SIDE OF A BUILDING WITHOUT WARNING. THE AIR BAGS DID NOT DEPLOY. THERE WERE NO INJURIES AND A POLI

20150922Component: POWER TRAINCrash reported

TL* 2015 GMC SIERRA. WHILE THE VEHICLE WAS PARKED, IT BEGAN TO COAST BACKWARDS AND COLLIDED INTO THE SIDE OF A BUILDING WITHOUT WARNING. THE AIR BAGS DID NOT DEPLOY. THERE WERE NO INJURIES AND A POLI

20230308Component: ELECTRICAL SYSTEMFire reported

The contact owns a 2015 GMC Sierra. The contact stated that when doing the initial start, the rear of the vehicle began smoking and caught on fire. The contact turned off the vehicle and the fire sett

Showing the 5 most serious of 67 complaints filed with NHTSA.

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