1975-78 BUICK

Year, Engine & Fuel System

Emission Control Systems & Devices

Remarks

1975

3.8L (231") V6 2-Bbl.

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR, SPK , CAM, CTO, EFE, ISS⁽²⁾, SDV⁽²⁾

⁽¹⁾	Type 4 closed.

⁽²⁾	Calif. only.

⁽³⁾	350" 4-Bbl. Century Wagons & LeSabre Sedans & Coupes (Calif. only).

⁽⁴⁾	Federal only.

⁽⁵⁾	All Exc. 4-Bbl. w/AIS.

⁽⁶⁾	350" 4-Bbl. Century, Regal, LeSabre & Estate models (Calif. only).

⁽⁷⁾	LeSabre Sedan & Coupe in Calif. early production. All LeSabre, Estate, Electra & Riviera models for later production.

⁽⁸⁾

A/T only

4.0L (250") 6-Cyl. 1-Bbl.⁽⁴⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR, SPK , EFE, ISS, OTS

4.0L (250") 6-Cyl. 1-Bbl.⁽²⁾⁽⁸⁾

PCV ⁽¹⁾ , TAC, AIS, EVAP, OC, EGR, SPK , EFE, ISS, OTS

4.3L (260") V8 2-Bbl.⁽⁸⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, BP/EGR, SPK , BPS, CTO, EFE, FAI

5.7L (350") V8 2 & 4-Bbl.

PCV ⁽¹⁾ , TAC, AIS ⁽³⁾ , EVAP, OC, EGR, SPK , CAM, CTO, EFE⁽⁵⁾, FAI, TDP⁽⁶⁾

6.5L (400") 2 & 4-Bbl.⁽⁸⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR, SPK , CTO, EFE

7.5L (455") 4-Bbl.⁽⁸⁾

PCV ⁽¹⁾ , TAC, EVAP, OC, EGR, SPK , CAM, CTO, EFE, FAI, TDP⁽⁷⁾.

1976

3.8L (231") V6 2-Bbl.

PCV, TAC, EVAP, OC, EGR , A/C-ISS⁽¹⁰⁾, EFE, EFE-PVS, EGR-PVS, ISS⁽⁹⁾

⁽⁹⁾	Calif. only.

⁽¹⁰⁾	Skylark w/A/C.

⁽¹¹⁾	Federal only.

⁽¹²⁾	Early production (Calif.).

⁽¹³⁾	Late production (Calif.).

4.3L (260") V8 2-Bbl.⁽¹¹⁾

PCV, TAC, EVAP, OC, BP/EGR , BPS, EGR-TCV, FAI, SAVM⁽¹¹⁾

4.3L (260") V8 2-Bbl.⁽⁹⁾⁽¹²⁾

PCV, TAC, EVAP, OC, BP/EGR , BPS, EFE, EFE-PVS, EGR-PVS, FAI

4.3L (260") V8 2-Bbl.⁽¹⁰⁾⁽¹³⁾

PCV, TAC, EVAP, OC, BP/EGR , BPS, FAI, TCV

5.7L (350") V8 2 & 4-Bbl.

PCV, TAC, EVAP, OC, EGR , D-PVS, EFE, EGR-PVS

7.5L (455") 4-Bbl.

PCV, TAC, EVAP, OC, EGR , D-PVS, EFE, EFE-PVS, EGR-PVS

1977

3.8L (231") V6 2-Bbl.

PCV, TAC, AIS ⁽¹⁴⁾ , EVAP, OC, BP/EGR , EFE, EFE-CKV, EFE-TVS, EGR-TVS, SAVM⁽¹⁵⁾

⁽¹⁴⁾	Calif. & Hi Alt. only.

⁽¹⁵⁾	Economy Special only.

⁽¹⁶⁾	A/T with A/C.

⁽¹⁷⁾	Calif. only.

⁽¹⁸⁾	Federal only.

4.9L (301")V8 2-Bbl.

PCV, TAC, EVAP, OC, BP/EGR, SPK , DSVMV, DTVS, DVDV⁽¹⁶⁾, EFE-CKV, EFE-TVS

5.0L (305") V8 2-Bbl.

PCV, TAC, EVAP, OC, BP/EGR , EFE-CKV, EFE-TVS, EGR-TVS

5.7L (350") V8 4-Bbl. (VIN H & J)

PCV, TAC, EVAP, OC, BP/EGR , EFE, EFE-TVS, EGR-TVS

5.7L (350") V8 4-Bbl. (VIN L)

PCV, TAC, AIS 4, EVAP, OC, BP/EGR, SPK , DTVS⁽¹⁷⁾, EFE, EFE-CKV, EFE-TVS, EGR-TVS

5.7L (350") V8 4-Bbl. (VIN R)

PCV, TAC, AIS ⁽¹⁴⁾ , EVAP, OC, BP/EGR, SPK , CTVS, DTVS, EFE, EGR-TCV

6.6L (403") V8 4-Bbl.

PCV, TAC, AIS ⁽¹⁴⁾ , EVAP, OC, BP/EGR, SPK , CTVS, DTVS, EFE, EGR-DTVS⁽¹⁷⁾, EGR-TCV, SAVM⁽¹⁸⁾, VRV⁽¹⁸⁾

1978

3.2L (196") V6 2-Bbl.

PCV, TAC, EVAP, OC, EGR , EFE, EFE-CKV, EFE-TVS, EGR-TVS

⁽¹⁹⁾	Century, Regal, Skyhawk & Skylark with M/T.

⁽²⁰⁾	Calif. & Hi Alt. only.

⁽²¹⁾	Estate Wagon, LeSabre & Riviera with A/T & A/C.

⁽²²⁾	A/T & A/C only.

⁽²³⁾	Calif. only.

⁽²⁴⁾	Federal only.

3.8L (231") V6 2-Bbl.

PCV, TAC, AIS ⁽²⁰⁾ , EVAP, OC, EGR , ADS⁽¹⁹⁾, EFE, EFE-CKV, EFE-TVS, EGR-TVS, ISS⁽²¹⁾

3.8L (231") V6 2-Bbl. Turbo

PCV, TAC, EVAP, OC, EGR , EFE, EFE-CKV EFE-TVS, EGR-TVS

3.8L (231") V6 4-Bbl. Turbo

PCV, TAC, AIS, EVAP, OC, EGR , EFE, EFE-CKV, EFE-TVS, EGR-TVS

4.9L (301") V8 2-Bbl.

PCV, TAC, EVAP, OC, EGR, SPK , DS VMV⁽²²⁾, DTVS, DVDV⁽²²⁾, EFE, EFE-CKV, EGR-TVS, SVB, TCV

5.0L (305") V8 2-Bbl.

PCV, TAC, EVAP, OC, EGR , EFE, EFE-CKV EFE-TVS, EGR-TVS

5.0L (305") V8 4-Bbl.

PCV, TAC, EVAP, OC, EGR , EFE, EFE-CKV EFE-TVS, EGR-TVS

5 7L(350") V8 4-Bbl (VIN X)

PCV, TAC, EVAP, OC, EGR, SPK , EFE, EFE-TVS, EGR-TVS

⁽²⁵⁾	Century, Regal, Skyhawk & Skylark with M/T.

⁽²⁶⁾	Calif. & Hi Alt only.

⁽²⁷⁾	Estate Wagon, LeSabre & Riviera with A/T & A/C.

⁽²⁸⁾	A/T & A/C only.

⁽²⁹⁾	Calif. only.

⁽³⁰⁾	Federal only.

5 7L (350") V8 4-Bbl (VIN L)

PCV, TAC, AIS, EVAP, OC, EGR, SPK , EFE, EFE-CKV, EFE-TVS, EGR DTVS⁽²⁹⁾, EGR-TVS

5 7L(350") V8 4-Bbl (VIN 4)

PCV, TAC, AIS ⁽²⁶⁾ , EVAP, OC, EGR, SPK , CTVS, DTVS, DVDV⁽²⁹⁾, EFE, TCV, VRV⁽³⁰⁾

6 6L (403") V8 4-Bbl.

PCV, TAC, AIS ⁽²⁶⁾ , EVAP, OC, EGR, SPK , CTVS, DTVS, DVDV, EFE, EGR-DTVS⁽²⁹⁾, SAVM, TCV, VRV

1979

3 2L(196") V6 2-Bbl. (VIN C)⁽³¹⁾

PCV, TAC, EVAP, OC, EGR, SPK , DTVS, EFE, EFE-CKV, EFE-TVS, EGR-TVS, SAVM

⁽³¹⁾	Federal only

⁽³²⁾	Calif. only.

⁽³³⁾	Calif. & Hi Alt only.

⁽³⁴⁾	Riviera only.

⁽³⁵⁾	Exc. VIN 2.

3.8L (231") V6 2-Bbl (VIN A & 2)

PCV, TAC, AIS ⁽³²⁾ , EVAP, TWC ⁽³²⁾ , EGR, SPK, CEC , DTVS⁽³⁵⁾, EFE, EFE-CKV, EFE-TVS, EGR-TVS, SAVM⁽³⁵⁾, TAC-TCV

3.8L (231") V6 4-Bbl. Turbo (VIN 3)

PCV, TAC, AIS, EVAP, OC, EGR , EFE, EFE-CKV, EFE-TVS, EGR-TVS, SUB-TVS⁽³⁴⁾, TAC-TCV⁽³⁴⁾

4.9L (301") V8 2-Bbl (VIN Y)

PCV, TAC, EVAP, OC, EGR, SPK , CTVS, DTVS, DVRV, EFE, EFE-TVS, SRDV

4.9L(301") V8 4-Bbl (VIN W)

PCV, TAC, EVAP, OC, EGR, SPK , DS-VMV, DTVS DVDV, EFE, EFE-TVS, SVB-TVS

5.0L (305") V8 4-Bbl (VIN H)

PCV, TAC, AIS ⁽³³⁾ , EVAP, OC, EGR , CP-TVS, DTVS, EFE, EFE-CKV, EFE-TVS, SDV

5.7L (350") V8 4-Bbl (VIN L)

PCV, TAC, AIS ⁽³³⁾ , EVAP, OC, EGR , CP-TVS, EFE, EFE-CKV, EFE-TVS

5.7L (350") V8 4-Bbl (VIN X)

PCV, TAC, EVAP, OC, EGR , CP-TVS, CTVS EFE, EFE-TVS EGR-TVS

5.7L (350") V8 4-Bbl (VIN R)

PCV, TAC, AIS ⁽³²⁾ , EVAP, OC, EGR , CTVS, DTVS, EGR-DTVS⁽³²⁾, EGR-TCV

6.6L (403") V8 4-Bbl (VIN K)

PCV, TAC, AIS ⁽³²⁾ , EVAP, OC, EGR , CTVS DTVS, EGR-DTVS, EGR-TCV

A/C-ISS - A/C Idle Speed-Up Solenoid

ACV - Air Control Valve

ADS - Anti-Dieseling Solenoid

AIS - Air Injection System

AMgV - Air Management Valve

APCV - Air Pump Control Valve

APDV - Air Pump Diverter Valve

ASS - Air Switching Solenoid

ASV - Air Switching Valve

ATS - Air Temp. Sensor

BP/EGR - Backpressure EGR

BPS - Backpressure System/Sensor

BPT - Backpressure EGR Transducer

BPV - By-Pass/Backpressure Valve

C-4 - Computer Controlled Catalytic Converter

CAM - Choke Air Modulator Switch

CANCV - Canister Control Valve

CCS - Controlled Combustion System

CDR - Crankcase Depression Relief

CEAB - Cold Engine Air Bleed

CEC - Combined Emission Control Valve

CEC - Computerized Engine Control

CESS - Cold Engine Sensor Switch

CKV - Check Valve

CP - Canister Purge

CPS - Canister Purge Solenoid

CPV - Canister Purge Valve

CTO - Coolant Temp. Override

CTS - Coolant Temp. Switch

CTVS - Choke Thermal Vacuum Switch

CV - Control Valve/Crankcase Ventilation

DBC - Dual Bed Catalytic

DCLV - Deceleration Valve

DELEL V - Deceleration Valve

DLV - Delay Valve

DPS - Differential Pressure Sensor

D-PVS - Distributor Ported Vacuum Switch

DS - Distributor Spark

DSVMV - Distributor Spark Vacuum Modulator Valve

DTVS - Distributor Thermal Vacuum Switch

DVAS - Distributor Vacuum Advance Solenoid

DVDV - Distributor Vacuum Delay Valve

DVRV - Distributor Vacuum Regulating Valve

EAC - Electric Air Control Valve

EAS - Electric Air Switching Valve

ECU - Electronic Control Unit

EFE - Early Fuel Evaporation

EFE-PVS - EFE Ported Vacuum Switch

EFE-TVS - EFE Thermal Vacuum Switch

EFI - Electronic Fuel Injection

EGR - Exhaust Gas Recirculation

EGRCS - EGR Control Solenoid

EGR-DTVS - EGR Dist. Thermal Vac. Switch

EGR-PVS - EGR Ported Vac. Switch

EGR-TCV - EGR Thermal Control Valve

EPR - Exhaust Pressure Regulator

ESC - Electronic Spark Control

ESS - Electronic Spark Selection

EST - Electronic Spark Timing

ETS - Engine Temp. Switch

EVAP - Evaporative Control System

FAI - Fresh Air Intake System

FBVS - Fuel Bowl Vent Solenoid

ISS - Idle Stop Solenoid

MAP - Manifold Absolute Pressure Sensor

MPFI - Multi-Port Fuel Injection

NLV - Non-Linear Valve

O ₂ - Oxygen Sensor

OC - Oxidation Catalyst

ORC - Oxidation Reduction Catalytic

OTS - Oil Temp. Switch for Early Fuel Evaporation

PAS - Pulse Air Solenoid

PCV - Positive Crankcase Ventilation

PEVR - Power Enrichment Vacuum Regulator

PFI - Port Fuel Injection

PR-CV - Pressure Control Valve

PSV - Pulse Air Shut-Off Valve

PV - Pulse Air Valve

R-DLV - Retard Delay Valve

RDV - Distributor Retard Delay Valve

RLY - Relay

SAVM - Spark Advance Vacuum Modulator

SBC - Single Bed Catalytic

SDV - Spark Delay Valve

SOL - Solenoid

SOL-ASS - Solenoid Assembly

SRDV - Spark Retard Delay Valve

SVB - Secondary Vacuum Break

SWV - Switching Valve

TAC - Thermostatic Air Cleaner

TAS - Throttle Actuator Solenoid

TBI - Throttle Body Injection

TBVV - Thermal Bowl Vent Valve

TCS - Transmission Controlled Spark

TCV - Thermal Control Valve

TDP - Throttle Closing Dashpot

TK - Throttle Kicker

TP-CV - Tank Pressure Control Valve

TPS - Throttle Position Sensor

TPI - Tuned Port Injection

TRV - Transmission Vacuum Valve

TVS - Thermal Vacuum Switch

TVV - Thermal Vacuum Valve

TWC - Three-Way Catalyst

VCKV - Vacuum Check Valve

YCS - Vacuum Control Switch

VDV - Vacuum Delay Valve

VIS - Vacuum Input Switch

VM-CV - Vacuum Modulator Check Valve

VMV - Vacuum Modulator Valve

VP - Vacuum Pump

VRS - Vacuum Retard Switch

VRV - Vacuum Reducer/Regulator Valve

VS - Vacuum Switch

VSENS - Vacuum Sensor

VSS - Vacuum Switch Solenoid

VSV - Vacuum Switching Valve

WSTGT - Wastegate

WSTGT-ACT - Wastegate Actuator

WSTGT-SOL - Wastegate Solenoid