Buick Regal LS 2001 - 2001 GENERAL MOTORS Century & Regal

Buick Regal LS 2001 - BUZZERS, RELAYS & TIMERS

Buick Regal LS 2001 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
Accessory Time Delay (RAP) Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Back-Up Lamp Relay	Behind left side of dash, mounted to multi-purpose bracket near BCM. See Fig. 8 .
Hazard Lamp/Turn Signal Lamp Flasher	Below left side of dash, mounted on multi-purpose bracket near BCM. See Fig. 8 .
Headlamp Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Rear Compartment Lid Release Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Rear Window Defogger Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .

Buick Regal LS 2001 - CIRCUIT PROTECTION DEVICES

Buick Regal LS 2001 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fuse Block	Behind right side of dash, in right door opening.
Fusible Links (3.1L VIN M)	Left side of engine, on starter assembly. See Fig. 3 .
Underhood Accessory Wiring Junction Block	Mounted to right strut tower.

Buick Regal LS 2001 - CONTROL UNITS

Buick Regal LS 2001 CONTROL UNITS LOCATION

Component	Location
Automatic Transmission Control (BTSI)	Center of console.
Blower Motor Control Module	In right side of HVAC module.
Body Control Module (BCM)	Behind left side of dash, left of steering column.
Cruise Control Module	Front of left strut tower.
Electronic Brake Control Module (EBCM)	At left side of engine compartment, near strut tower.
Ignition Control Module (ICM) (3.1L VIN M)	Top right side of engine. See Fig. 1 .
Ignition Control Module (ICM) (3.8L VIN K)	Top front of engine.
Ignition Control Module (ICM) (3.8L VIN 1)	Top front of engine.
Inflatable Restraint Sensing & Diagnostic Module (SDM)	Below carpet, under right front seat.
Powertrain Control Module (PCM)	Left front side of engine compartment, in air cleaner assembly.
Radio Antenna Module	On rear window header panel, above headliner.
Remote Control Door Lock Receiver (RCDLR)	Left side of dash, on right side of instrument cluster.
Seat Heater Control Module (2)	Below respective front seat.
Sun Roof Module (Express Open)	Center rear of sun roof.

Buick Regal LS 2001 - MOTORS

Buick Regal LS 2001 MOTORS LOCATION

Component	Location
Air Temperature Actuator (Left)	Left side of HVAC module.
Air Temperature Actuator (Right)	Right side of HVAC module. See Fig. 10 .
Blower Motor	Behind right side of dash, in HVAC module. See Fig. 10 .
Engine Coolant Fan Motor (Left)	On left side of radiator.
Engine Coolant Fan Motor (Right)	On right side of radiator.
Idle Air Control (IAC) Valve (3.1L VIN M)	On throttle body assembly. See Fig. 2 .
Idle Air Control (IAC) Valve (3.8L VIN K)	On throttle body assembly. See Fig. 4 .
Idle Air Control (IAC) Valve (3.8L VIN 1)	On throttle body assembly. See Fig. 4 .
Sun Roof Actuator	Center rear of sun roof module.
Windshield Washer Pump	On right front corner of engine compartment, in washer fluid reservoir.
Windshield Wiper Motor	On left side of firewall, below air inlet screen.

Buick Regal LS 2001 - SENDING UNITS & SENSORS

Buick Regal LS 2001 SENDING UNITS & SENSORS LOCATION

Component	Location
A/C Refrigerant Pressure Sensor	On left side of engine compartment, on accumulator.
Ambient Air Temperature Gauge Sensor	Behind front fascia, mounted to radiator air baffle.
Camshaft Position Sensor (CMP) (3.1L VIN M)	Top front of engine, below intake plenum.
Camshaft Position Sensor (CMP) (3.8L VIN K)	Front of engine, above crankshaft pulley.
Camshaft Position Sensor (CMP) (3.8L VIN 1)	Front of engine, above crankshaft pulley.
Crankshaft Position (CKP) Sensor (7X) (3.1L VIN M)	Right side of engine, below exhaust manifold. See Fig. 1 .
Crankshaft Position (CKP) Sensor (24X) (3.1L VIN M)	Front of engine, behind harmonic balancer. See Fig. 3 .
Crankshaft Position (CKP) Sensor (3.8L VIN K)	Front of engine, behind harmonic balancer.
Crankshaft Position (CKP) Sensor (3.8L VIN 1)	Front of engine, behind harmonic balancer.
Daytime Running Lamp (DRL) Ambient Light Sensor	Top right side of dash, at base of windshield.
Engine Coolant Temperature (ECT) Sensor (3.1L VIN M)	Top left side of engine, below throttle body.
Engine Coolant Temperature (ECT) Sensor (3.8L VIN K)	Top left side of engine, below throttle body. See Fig. 6 .
Engine Coolant Temperature (ECT) Sensor (3.8L VIN 1)	Top left side of engine, below throttle body. See Fig. 6 .
Heated Oxygen Sensor 1 (HO2S 1)	In right side exhaust manifold.
Heated Oxygen Sensor 2 (HO2S 2)	In exhaust system, rear of catalytic converter.
Inside Air Temperature Sensor	Front of dash, below right side of instrument cluster.
Intake Air Temperature (IAT) Sensor (3.1L VIN M)	Left front of engine compartment, in air cleaner duct.
Intake Air Temperature (IAT) Sensor (3.8L VIN K)	Left front of engine compartment, in air cleaner duct. See Fig. 4 .
Intake Air Temperature (IAT) Sensor (3.8L VIN 1)	Left front of engine compartment, in air cleaner duct. See Fig. 4 .
Knock Sensor (KS) Bank 1 (3.1L VIN M)	Lower left side of engine, above starter. See Fig. 3 .
Knock Sensor (KS) Bank 1 (3.8L VIN K)	Left side of engine, in front of starter. See Fig. 5 .
Knock Sensor (KS) Bank 1 (3.8L VIN 1)	Left side of engine, in front of starter. See Fig. 5 .
Knock Sensor (KS) Bank 2	Lower right side of engine, below exhaust manifold.
Manifold Absolute Pressure (MAP) Sensor (3.1L VIN M)	Top right side of engine, above valve cover.
Manifold Absolute Pressure (MAP) Sensor (3.8L VIN K)	Top of engine, on front of intake manifold.
Manifold Absolute Pressure (MAP) Sensor (3.8L VIN 1)	Top right side of engine, above valve cover.
Mass Airflow (MAF) Sensor (3.1L VIN M)	Left side of engine, in air cleaner duct.
Mass Airflow (MAF) Sensor (3.8L VIN K)	Top rear of engine, part of throttle body assembly. See Fig. 4 .
Mass Airflow (MAF) Sensor (3.8L VIN 1)	Top rear of engine, part of throttle body assembly. See Fig. 4 .
Sunload Temperature Sensor	Top left side of dash.
Throttle Position (TP) Sensor (3.1L VIN M)	On throttle body assembly. See Fig. 2 .
Throttle Position (TP) Sensor (3.8L VIN K)	On throttle body assembly. See Fig. 4 .
Throttle Position (TP) Sensor (3.8L VIN 1)	On throttle body assembly. See Fig. 4 .
Vehicle Speed Sensor (VSS)	Lower right side of engine compartment, on transaxle.
Wheel Speed Sensor (4)	On wheel hub assembly.

Buick Regal LS 2001 - SOLENOIDS & SOLENOID VALVES

Buick Regal LS 2001 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
Automatic Transmission Shift Lock Control Actuator (BTSI)	In column shift.
Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (3.1L VIN M)	Top right side of engine, behind ignition control module.
Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (3.8L VIN K)	Top left side of engine, near center of valve cover.
Evaporative Emissions (EVAP) Canister Purge Solenoid Valve (3.8L VIN 1)	Top right side of engine, near center of valve cover.
Evaporative Emissions (EVAP) Canister Vent Solenoid Valve	Behind left side of rear fascia splash shield, in wheelwell.
Exhaust Gas Recirculation (EGR) Valve (3.1L VIN M)	Top rear of engine, near throttle body. See Fig. 2 .
Exhaust Gas Recirculation (EGR) Valve (3.8L VIN K)	Top rear of engine, near throttle body.
Exhaust Gas Recirculation (EGR) Valve (3.8L VIN 1)	Top rear of engine, near throttle body.
Steering Column Electric Park Lock	In steering column, near ignition key cylinder.
Steering Gear (MSVA) Actuator	Left rear of engine compartment, behind transaxle.
Supercharger By-Pass Valve (3.8L VIN 1)	Top left of engine, above left valve cover.
Vacuum/Electric Solenoid	On right side of HVAC module.

Buick Regal LS 2001 - SWITCHES

Buick Regal LS 2001 SWITCHES LOCATION

Component	Location
Brake Fluid Level Indicator Switch	In brake fluid reservoir.
Cruise Control Release Switch	Under left side of dash, on brake pedal bracket.
Engine Coolant Level Switch	Mounted on right side of radiator.
Engine Oil Level Indicator Switch (3.1L VIN M)	On bottom of engine oil pan.
Engine Oil Level Indicator Switch (3.8L VIN K)	On bottom of engine oil pan. See Fig. 5 .
Engine Oil Level Indicator Switch (3.8L VIN 1)	On bottom of engine oil pan. See Fig. 5 .
Engine Oil Pressure Indicator Switch (3.1L VIN M)	Lower left side of engine, above starter. See Fig. 3 .
Engine Oil Pressure Indicator Switch (3.8L VIN K)	Lower right side of engine, above transaxle.
Engine Oil Pressure Indicator Switch (3.8L VIN 1)	Lower right side of engine, above transaxle.
Park Brake Indicator Switch	On parking brake assembly.
Park/Neutral Position Switch	On top right rear of transaxle. See Fig. 7 .
Seat Belt Switch	Part of driver's seat belt assembly.
Stoplight Switch	On brake pedal support bracket.
Windshield Washer Solvent Level Switch	Right front corner of engine compartment, in washer fluid reservoir.

Buick Regal LS 2001 - MISCELLANEOUS

Buick Regal LS 2001 MISCELLANEOUS LOCATION

Component	Location
Blower Motor Resistor	Under right side of dash, in right side of HVAC module. See Fig. 10 .
Data Link Connector (DLC)	Under left side of dash, right of steering column.
Fuel Pump Resistor	Outside of right front frame rail, in front of wheel.
Low Frequency Audio Amplifier	Below rear speaker shelf, in trunk.
Power Antenna Amplifier	Above headliner, on rear center of roof.

Buick Regal LS 2001 - CONNECTORS

Buick Regal LS 2001 CONNECTORS LOCATION

Component	Location
C101 (Gray, 20 Pin)	Left side of engine compartment, on strut tower.
C102 (Black, 16 Pin)	On right rear of engine compartment, near generator.
C105 (Gray, 4 Pin)	On radiator, between left & right cooling fans.
C110 (Black, 8 Pin)	On right top of engine, above fuel injector No. 3.
C113 (Gray, 20 Pin)	Left side of engine compartment, top of transaxle.
C120 (Gray, 3 Pin)	Lower right side of engine compartment, below battery tray.
C125 (Black, 1 Pin)	Left rear corner of power steering pump.
C126 (Gray, 2 Pin)	Top center of engine, near injector No. 5.
C141 (10 Pin)	Behind left headlamp.
C142 (10 Pin)	Behind right headlamp.
C171 (Gray, 2 Pin)	Top of left front strut tower.
C172 (Gray, 2 Pin)	Top of right front strut tower.
C200 (Black, 56 Pin)	Behind right side of dash. See Fig. 10 .
C201 (Black, 48 Pin)	Behind dash, on right side of steering column.
C204 (22 Pin)	Behind right side of dash, near shroud.
C205 (Black, 4 Pin)	Behind dash, on right side of steering column.
C206 (Black, 3 Pin)	Behind right side of dash, near C200.
C207 (Black, 3 Pin)	In steering column.
C215 (Yellow, 2 Pin)	Behind dash, on right side of steering column.
C216 (Yellow, 2 Pin)	Behind dash, on right side of steering column.
C240 (Natural, 10 Pin)	In console, behind console shift.
C242 (Black, 3 Pin)	Behind ashtray.
C301 (Black, 16 Pin)	On left "A" pillar.
C302 (Black, 16 Pin)	On right "A" pillar.
C311 (Black, 6 Pin)	Below driver seat.
C312 (Black, 6 Pin)	Below passenger seat.
C351 (Black, 10 Pin)	On left "B" pillar.
C352 (Black, 10 Pin)	On right "B" pillar.
C390 (Black, 8 Pin)	On right side of package shelf support.
C395 (Black, 2 Pin)	In rear compartment, under right side of package shelf.
C398 (Black, 3 Pin)	Behind right "C" pillar trim panel.
C399	Right side of rear package shelf.
C401 (Gray, 6 Pin)	In rear compartment, behind left taillamp.
C402 (Gray, 6 Pin)	In rear compartment, behind right taillamp.
C403 (Black, 8 Pin)	Left side of rear compartment.
C404	Left side of rear compartment.
C405 (Black, 8 Pin)	Rear compartment floor, forward of spare tirewell.
C406	Left side of rear compartment.
C410 (Black, 8 Pin)	Right side of rear compartment, above wheelhouse.
C420 (Blue, 2 Pin)	In rear compartment, under center of package shelf.
C423 (Black, 16 Pin)	Near left rear wheelhouse.
C915 (Black, 4 Pin)	In center of rear compartment lid applique.

Buick Regal LS 2001 - GROUNDS

Buick Regal LS 2001 GROUNDS LOCATION

Component	Location
G100	Right side of engine compartment, at base of battery.
G101	Front left side of radiator support.
G111 (3.1L VIN M)	Lower left front of engine, on transaxle stud, left of starter.
G111 (3.8L VIN K)	Right front of engine, on ignition control module bracket.
G111 (3.8L VIN 1)	Right front of engine, on ignition control module bracket.
G113 (3.1L VIN M)	Lower left front of engine, on transaxle stud, left of starter.
G113 (3.8L VIN K)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G113 (3.8L VIN 1)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G117 (3.1L VIN M)	Lower left front of engine, on transaxle stud, left of starter.
G117 (3.8L VIN K)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G117 (3.8L VIN 1)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G171 (3.1L VIN M)	Lower left front of engine, on transaxle stud, left of starter.
G171 (3.8L VIN 1)	Lower left front of engine, on transaxle stud, left of starter.
G171 (3.8L VIN K)	Lower left front of engine, on transaxle stud, left of starter.
G200	Behind right side of dash compartment. See Fig. 10 .
G201	Below dash, left side of steering column.
G203	Below dash, right side of steering column.
G301	Inside left door sill, forward of left front seat.
G401	Inside rear compartment, below left side of rear window trim panel.
G402	Inside rear compartment, below right side of rear window trim panel.

Buick Regal LS 2001 - SPLICES

Buick Regal LS 2001 SPLICES LOCATION

Component	Location
S101	Cooling fan jumper harness, 20 cm from left connector to engine cooling fan motor.
S102	Cooling fan jumper harness, 20 cm from left connector to engine cooling fan motor.
S103	Cooling fan jumper harness, 19.5 cm from right connector to engine cooling fan motor.
S104	Cooling fan jumper harness, 19.5 cm from right connector to engine cooling fan motor.
S105	Engine wiring harness, front of engine compartment, 4 cm from C105 breakout.
S106	Engine wiring harness, left side of engine compartment, 7 cm from PCM breakout.
S109	Engine wiring harness, top left of engine, 6 cm from C110 breakout.
S115	Automatic transaxle wiring harness, inside transaxle housing, 19 cm from C113.
S121	Fuel injector jumper harness, midway between fuel injector No. 3 breakout, & MAP sensor breakout.
S124	Forward lamp wiring harness, below left headlamp, 7 cm from left headlamp breakout.
S144	ICM harness, 12 cm from ICM.
S145	ICM harness, 18 cm from ICM.
S167	Engine wiring harness, left side of engine compartment, 4 cm front PCM breakout.
S202	I/P wiring harness, right side of steering column, 19 cm from radio breakout.
S203	I/P harness, above instrument cluster, 4 cm from fog lamp switch, instrument cluster breakout.
S205	I/P wiring harness, below dash, near C201, 14 cm from G201 breakout.
S211	I/P wiring harness, right side of steering column, 20 cm from instrument cluster breakout.
S220	I/P wiring harness, right side of steering column, 18 cm from G200 breakout.
S221	I/P wiring harness, right side of steering column, 17 cm from data link connector breakout.
S228	I/P wiring harness, right side of dash, 24 cm from G200 breakout.
S230	I/P wiring harness, 18 cm from radio breakout.
S231	I/P wiring harness, 33 cm from HVAC control module connector.
S233	I/P wiring harness, behind center of dash, 4 cm from radio breakout.
S234	I/P wiring harness, right side of steering column, 13 cm from instrument cluster breakout.
S240	I/P wiring harness, right side of steering column near C201, 1 cm from SP205 breakout.
S241	I/P wiring harness, below radio, 15 cm from radio breakout.
S242	I/P wiring harness, below radio, 22 cm from radio breakout.
S249	I/P wiring harness, near steering column, 4 cm from C201 breakout.
S258	I/P wiring harness, 4 cm left of HVAC control module breakout.
S263	I/P wiring harness, near blower motor, 4 cm from door lock relay breakout.
S267	I/P wiring harness, right side of dash, 11 cm from G200 breakout.
S268	I/P wiring harness, right side of dash, 7 cm from breakout for group of four relays.
S269	I/P wiring harness, near blower motor, 13 cm from door lock relay breakout.
S270	I/P wiring harness, behind right side of dash, 4 cm from blower motor control module.
S283	I/P wiring harness, left side of steering column, 4 cm from headlamp switch breakout.
S291	I/P wiring harness, 7 cm from data link connector breakout, toward C201.
S292	I/P wiring harness, midway between headlamp switch breakout & back-up lamp relay breakout.
S295	Ashtray jumper wiring harness, inside ashtray, 5 cm from C242.
S301	Body wiring harness, right outside floor, next to passenger seat, 40 cm from C312 breakout.
S302	Main body wiring harness, 4 cm from SDM breakout, toward C312.
S303	Body wiring harness, on floor, under driver's seat, 10 cm from C311 breakout.
S307	Body wiring harness, on floor near center of vehicle, 20 cm from C325.
S314	Body wiring harness, below right side of front passenger seat, 4 cm from G302 breakout.
S315	Body wiring harness, below right front passenger seat, 10 cm from right wiring channel.
S323	Body wiring harness, on top of tunnel between front seat, 10 cm from C250 breakout.
S325	Body wiring harness, left side floor, under driver's seat, 23 cm from G301 breakout.
S326	Body wiring harness, below right front seat, 63 cm from C312 breakout.
S330	Driver seat adjuster wiring harness, 20 cm from C311 breakout.
S333	Passenger seat wiring harness, 20 cm from C312 breakout.
S335	Front floor console wiring harness, inside console, 7 cm from auxiliary power outlet breakout.
S336	Front floor console wiring harness, inside console, 20 cm from C240.
S348	Body wiring harness, floor, under passenger seat, 16 cm from C312 breakout.
S350	Body wiring harness, floor, under passenger seat, 10 cm from C312 breakout.
S383	Quarter courtesy & reading lamp wiring harness, left side of windshield header, 31 cm from left sunshade mirror breakout.
S385	Quarter courtesy & reading lamp wiring harness, 5 cm from right sunshade mirror breakout.
S401	OnStar(R) module jumper harness, left side of rear compartment, 11 cm from VIU connector.
S402	Right taillamp wiring harness, 3 cm from P402.
S403	Left taillamp wiring harness, 3 cm from P401.
S406	Body wiring harness, right side of rear compartment, 4 cm from right radio speaker breakout.
S408	Body wiring harness, right side of rear compartment, 33 cm from C390 breakout.
S409	Body wiring harness, below rear window panel, 10 cm from C405 breakout.
S410	Body wiring harness, left floor, under rear seat, 7 cm from C405 breakout.
S414	Body wiring harness, 5 cm from C420 breakout.
S416	CHMSL wiring harness, center of package shelf, 5 cm from center high mounted stop lamp breakout.
S418	Main body wiring harness, 7 cm from rear compartment courtesy lamp breakout.
S420	Body wiring harness, right side of rear compartment, 23 cm from C390 breakout.
S424	Main body wiring harness, 9 cm from rear compartment courtesy lamp breakout.
S431	Left taillamp wiring harness, 5 cm from P401.
S432	Right taillamp wiring harness, 5 cm from P402.
S440	Body wiring harness, in rear compartment, 6.5 cm from right rear radio speaker breakout.
S504	Left front door wiring harness, in left front door, 8 cm from master window switch breakout.
S506	Left front door wiring harness, 4 cm from driver door lock switch breakout.
S604	Right front door wiring harness, in right front door, 8 cm from front passenger window switch breakout.
S606	Left front door wiring harness, 4 cm from driver door lock switch breakout.
S905	Rear compartment lid wiring harness, in rear compartment lid, 7 cm from P415.
S915	Back-up lamp wiring harness, in rear compartment lid, 17 cm from P415.
S919	Back-up lamp wiring harness, in rear compartment lid, 23 cm from P415.
S930	Rear compartment lid wiring harness, in rear compartment lid, 38 cm from P432.