GM Service Manual Online
For 1990-2009 cars only

Abbreviation

Meaning

A

A

Ampere(s)

ABS

Antilock Brake System

A/C

Air Conditioning

AC

Alternating Current

ACL

Air Cleaner

A/D

Analog to Digital

A/F

Air/Fuel Ratio

AM/FM

Amplitude Modulation/Frequency Modulation

AMR

Anisotropic Magneto Resistive

Ant

Antenna

APP

Accelerator Pedal Position

ASM

Assembly

A/T

Automatic Transmission

ATDC

After Top Dead Center

Auto

Automatic

avg

Average

B

B+

Battery Positive Voltage

BARO

Barometric Pressure

BATT

Battery

BBV

Brake Booster Vacuum

BCM

Body Control Module

BEC

Body Electrical Centre

BHP

Brake Horsepower

BLK

Black

BLU

Blue

BP

Back Pressure

BPMV

Brake Pressure Modulator Valve

BPP

Brake Pedal Position

BRN

Brown

BTDC

Before Top Dead Center

C

°C

Degrees Celsius

Cam

Camshaft

CCDIC

Climate Control Driver Information Centre

cm³

Cubic Centimeters

CD

Compact Disc

cfm

Cubic Feet per Minute

cg

Center of Gravity

CKP

Crankshaft Position

CL

Closed Loop

CMP

Camshaft Position

CO

Carbon Monoxide

CO²

Carbon Dioxide

Coax

Coaxial

COMM

Communication

Conn

Connector

CPA

Connector Position Assurance

CPP

Clutch Pedal Position

CPU

Central Processing Unit

cu ft

Cubic Foot/Feet

cu in

Cubic Inch/Inches

CV

Constant Velocity Joint

Cyl

Cylinder(s)

D

dB

Decibels

dBA

Decibels on A-weighted Scale

DC

Direct Current, Duty Cycle

dia

Diameter

DIC

Driver Information Center

Diff

Differential

DIM

Dash Integrated Module

DK

Dark

DLC

Data Link Connector

DMM

Digital Multimeter

DOHC

Dual Overhead Camshafts

DR, Drvr

Driver

DRL

Daytime Running Lamps

DSC

Driver Shift Control

DTC

Diagnostic Trouble Code

E

EBCM

Electronic Brake Control Module

EC

Engine Control

ECM

Engine Control Module, Electronic Control Module

ECS

Emission Control System

ECT

Engine Coolant Temperature

EEPROM

Electrically Erasable Programmable Read Only Memory

EGR

Exhaust Gas Recirculation

EI

Electronic Ignition

ELAP

Elapsed

ELC

Electronic Level Control

EMI

Electromagnetic Interference

Eng

Engine

EOP

Engine Oil Pressure

EOT

Engine Oil Temperature

EPA

Environmental Protection Agency

EPROM

Erasable Programmable Read Only Memory

ESC

Electronic Suspension Control

ESD

Electrostatic Discharge

EVAP

Evaporative Emission

F

°F

Degrees Fahrenheit

ft

Foot/Feet

FT

Fuel Trim

FWD

Front Wheel Drive, Forward

G

g

Grams, Gravitational Acceleration

gal

Gallon

GM

General Motors

GMLAN

General Motors Local Area Network

gnd

Ground

gpm

Gallons per Minute

GRN

Green

GRY

Grey

H

H

Hydrogen

H²O

Water

HC

Hydrocarbons

hex

Hexagon, Hexadecimal

HSD2

High Side Driver 2

HO²S

Heated Oxygen Sensor

hp

Horsepower

HSPO

Holden Spare Parts Operations

HVAC

Heater-Ventilation-Air Conditioning

Hz

Hertz

I

IAC

Idle Air Control

IAT

Intake Air Temperature

IC

Integrated Circuit, Ignition Control

ICM

Ignition Control Module

ID

Identification, Inside Diameter

ign

Ignition

IMS

Internal Mode Switch

in

Inch/Inches

inst

Instantaneous, Instant

IP

Instrument Panel

IPC

Instrument Panel Cluster

ISO

International Standards Organization

ISOVIN

International Standards Organization Vehicle Identification Number

ISS

Input Shaft Speed

K

KAM

Keep Alive Memory

kg

Kilogram

kHz

Kilohertz

km

Kilometer

km/h

Kilometers per Hour

km/l

Kilometers per Liter

kPa

Kilopascals

KS

Knock Sensor

kV

Kilovolts

L

L

Litre

lb

Pound

lb ft

Pound Feet Torque

lb in

Pound Inch Torque

LCD

Liquid Crystal Display

LED

Light Emitting Diode

LF

Left Front

LR

Left Rear

M

MAF

Mass Air Flow

Man

Manual

MAP

Manifold Absolute Pressure

max

Maximum

mi

Miles

MIL

Malfunction Indicator Lamp

min

Minimum

mL

Milliliter

mm

Millimeter

mpg

Miles per Gallon

mph

Miles per Hour

ms

Millisecond

M/T

Manual Transmission

MV

Megavolt

mV

Millivolt

N

NC

Normally Closed

NEG

Negative

Neu

Neutral

N·m

Newton-meter Torque

NO

Normally Open

NOx

Oxides of Nitrogen

NOVRAM

Non-Volatile Random Access Memory

O

Oxygen

O²S

Oxygen Sensor

OBD

On-Board Diagnostics

OBD II

On-Board Diagnostics Second Generation

OCC

Occupant Climate Control

OD

Outside Diameter

ODO

Odometer

OE

Original Equipment

OEM

Original Equipment Manufacturer

OHC

Overhead Camshaft

Ω

Ohm

ORN

Orange

ORVR

On-Board Refueling Vapor Recovery

OSS

Output Shaft Speed

oz

Ounce(s)

P

PAG

Polyalkylene Glycol

PASS, PSGR

Passenger

PC

Pressure Control

PCB

Printed Circuit Board

PCS

Pressure Control Solenoid

PCV

Positive Crankcase Ventilation

PM

Permanent Magnet

PNK

Pink

PNP

Park/Neutral Position

PRNDL

Park, Reverse, Neutral, Drive, Low

POS

Positive, Position

PPL

Purple

ppm

Parts per Million

PSP

Power Steering Pressure

psi

Pounds per Square Inch

psig

Pounds per Square Inch Gauge

pt

Pint

PTC

Positive Temperature Coefficient

PWCM

Power Window Control Module

PWM

Pulse Width Modulated

Q

qt

Quart(s)

R

R-134a

Refrigerant-134a

RAM

Random Access Memory, Non-permanent memory device, memory contents are lost when power is removed.

RAP

Retained Accessory Power

Ref

Reference

Rev

Reverse

RF

Right Front, Radio Frequency

RFA

Remote Function Actuation

RH

Right Hand

ROM

Read Only Memory, Permanent memory device, memory contents are retained when power is removed.

RPM

Revolutions per Minute Engine Speed

RPO

Regular Production Option

RR

Right Rear

RT

Right

RTV

Room Temperature Vulcanizing Sealer

RWD

Rear Wheel Drive

S

s

Second(s)

SAE

Society of Automotive Engineers

SDM

Sensing and Diagnostic Module

SEO

Special Equipment Option

SFI

Sequential Fuel Injection

SIC

Secondary Information Centre

SOC

State of Charge

SPS

Service Programming System

sq ft, ft²

Square Foot/Feet

sq in, in²

Square Inch/Inches

SIR

Supplemental Restraint System

SS

Shift Solenoid

sync

Synchronize

T

TAC

Throttle Actuator Control

Tacho

Tachometer

TCC

Torque Converter Clutch

TCS

Traction Control System

TDC

Top Dead Center

TEMP

Temperature

TFP

Transmission Fluid Pressure

TFT

Transmission Fluid Temperature

TP

Throttle Position

TPA

Terminal Positive Assurance

TPMS

Tyre Pressure Monitoring System

TR

Transmission Range

TRANS

Transmission

TXV

Thermal Expansion Valve

U

UBEC

Underhood Body Electrical Centre

U-joint

Universal Joint

UV

Ultraviolet

V

V

Volt(s), Voltage

V6

Six-Cylinder Engine, V-Type

V8

Eight-Cylinder Engine, V-Type

Vac

Vacuum

VF

Vacuum Fluorescent

VIO

Violet

VIN

Vehicle Identification Number

V ref

Voltage Reference

VSES

Vehicle Stability Enhancement System

VSS

Vehicle Speed Sensor

W

w/

With

WHT

White

w/o

Without

WOT

Wide Open Throttle

WSS

Wheel Speed Sensor

Y

yd

Yard(s)

YEL

Yellow