2016-2018 GMC Sierra Service & Repair Manual

2017 General Information General Information - Sierra, Silverado INTRODUCTION ARROWS AND SYMBOLS This service manual uses various symbols in order to describe different service operations. Service Operations Symbols .. 1 of 71 2/22/2019, 11:09 PM

Fig. 1: Identifying Different Service Operations Symbols Courtesy of GENERAL MOTORS COMPANY Callout Component Name 1 Front of Vehicle 2 View Detail 2 View Detail .. 2 of 71 2/22/2019, 11:09 PM

Callout Component Name 3 Ambient Air Mixed with Another Gas or Indicate Temperature Change 4 Motion or Direction 5 View Angle 6 Dimension (1:2) 7 Ambient/Clean Air Flow or Cool Air Flow 8 Lubrication Point- Oil or Fluid 9 Task Related 10 Sectioning (1:3) 11 Gas Other Than Ambient Air or Hot Air Flow 12 Lubrication Point- Grease or Jelly 13 Multidirectional Arrow ACRONYMS AND UNITS Acronyms Acronym Meaning Definition 2WD Two-Wheel Drive Indicates that a vehicle has 2 driven wheels OR that a 4WD vehicle uses only 2 wheels for propulsion. So it can be the description of a vehicle configuration OR the operational mode of the drivetrain. 4WD Four-Wheel Drive Four-wheeled vehicle with a drivetrain that allows all four wheels to receive power from the engine simultaneously which provides better control on various surfaces. Can be used to describe the configuration of the vehicle OR as the operational mode of the drivetrain. 4WD vehicles usually can turn 2 wheels off to be in a 2WD mode. See also AWD. A/C Air Conditioning The cooling and dehumidification of indoor air for thermal comfort. A/D Analog to Digital Used in context of converting electrical analog signals to digital signals. ABS Antilock Braking System System on motor vehicles which prevents the wheels from locking while braking which helps the driver maintain control in heavy braking conditions. AC Alternating Current An electrical current whose magnitude and direction vary cyclically. AM Amplitude Modulation Method of impressing data onto an alternating-current (AC) carrier waveform. APP Accelerator Pedal Position A pedal that controls the throttle valve. AWD All-Wheel Drive All-wheel-drive systems are designed to function on all types of surfaces, both on- and off-road, and most of them cannot be switched off. This can also be called full-time four wheel drive. See also 4WD. AWG American Wire Gauge American wire gauge is a standardized wire gauge system used since 1857 predominantly in the United States for the diameters of round, solid, nonferrous, electrically conducting wire. .. 3 of 71 2/22/2019, 11:09 PM

Acronym Meaning Definition E.g. a wire of AWG10 has a diameter of 2.588mm, AWG20 corresponds to a diameter of 0.812mm. B+ Battery Positive Voltage The electrical potential on the positive terminal of the battery. BARO Barometric Pressure Atmospheric pressure as measured by a barometer. BCM Body Control Module This module supplies vehicle occupants with visual and audible information and controls various vehicle functions, BECM Battery Energy Control Module Control module used to regulate the battery voltage. BPP Brake Pedal Position Position of the foot pedal that moves a piston in the master brake cylinder. CAN Controller Area Network Serial data connection between control modules by Bosch CCM Chassis Control Module The module that controls various vehicle functions on the Chassis, like Engine/Trans Mount, Active Grille Air Shutter, Load Leveling, etc••• CD Compact Disc A small optical disk on which data such as music, text, or graphic images is digitally encoded. CNG Compressed Natural Gas This a substitute for gasoline or diesel fuel. It is made by compressing natural gas (which is mainly composed by methane (CH4), in a percentage range of 70% to 98%) CO Carbon Monoxide This is a product of the incomplete combustion of carbon-containing compounds, at room temperature this is a gas. It consists of one carbon atom covalently bonded to one oxygen atom. CO2 Carbon Dioxide Chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. CPA Connector Position Assurance Part of an electrical connector that prevents the connector from moving out of its socket. Usually needs to be pressed to unlock the connector when disconnecting it. CPP Clutch Pedal Position A lever operated with the foot that controls the coupling that connects or disconnects driving and driven parts of a driving mechanism. CV Constant Velocity Used in conjunction with CV joints, which connect two shafts at an angle while both shafts always have the same rotational speed without variations. CVT Continuously Variable Transmission A transmission in which the ratio of the rotational speeds of two shafts, as the input shaft and output shaft of a vehicle or other machine, can be varied continuously within a given range, providing an infinite number of possible ratios which improves fuel economy. D Drive D on the transmission gear selector lever. .. 4 of 71 2/22/2019, 11:09 PM

Acronym Meaning Definition DAB Digital Audio Broadcast Technology for broadcasting of audio using digital radio (carries information via digital signal) transmission. DC Direct Current Continuous current, constant flow of electric charge. DLC Data Link Connector This is an electronic connector typically located underneath the driver's side dashboard, just above the pedals. The connector has 16 pins. DMM Digital Multimeter Electronic measuring instrument that combines several functions in one unit. The most basic instruments include an ammeter, voltmeter, and ohmmeter. DOHC Dual Overhead Camshaft Dual overhead camshafts (DOHC) are higher performance engines, they produce more power, and can run at higher speeds because they allow an engine to have four valves per cylinder. Each camshaft operates two of the valves, one camshaft handles the intake valves, and one handles the exhaust valves DPF Diesel Particulate Filter Device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine. DRL Daytime Running Lamps White lights mounted on the front of an automobile that automatically switch on when the key is turned and are intended for daytime use, to increase the visibility of the automobile. DSCC Distance Sensing Cruise Control A type of cruise control that automatically maintains the distance between vehicles. DSP Digital Signal Processor A specialized microprocessor designed specifically for digital signal processing, generally in real-time computing. DTC Diagnostic Trouble Code An electronic signal stored in an automotive computer, indicating the presence of a fault detected by that computer. DVD DVD A popular optical disc storage media format the size of a CD. Used mainly for movies but also for data. DVD has no spelled out version (officially it does not mean Digital Video Disc or Digital Versatile Disc, it just means DVD). EBCM Electronic Brake Control Module This module contains a microprocessor and software for antilock braking system operation. ECM Engine Control Module This electronic module works with a vehicle's sensors and engine control devices to insure that the engine operates at maximum efficiency and performance. It performs three vital functions. Receives electronic signals from engine sensors. Analyzes the data and makes an engine performance decision (based on the pre-set parameters within the unit). Sends an "output command" to an actuator that adjusts engine performance. .. 5 of 71 2/22/2019, 11:09 PM

2016-2018 GMC Sierra Service & Repair Manual

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