Brands Vehicles

Lowest Prices

Free Returns

Online Since 2009

JOIN GEARS TO SAVE 5%

ACDelco 55488558 Oxygen Sensor


Brand:	ACDelco
Part Number:	55488558
UPC:	808709821335
Weight:	0.19 lbs
Condition:	New

Availability:	0 in Stock
	OUT OF STOCK

Product Information

Description:

Get the ACDelco 55488558 Oxygen Sensor for your vehicle. Buy now and secure your purchase online!

GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle's exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

Detects oxygen content in the exhaust gases to help optimize emissions
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM regularly updates production and service part designs to integrate new materials and technologies
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
This part requires programming and/or special setup procedures. GM Service Information describes the procedures and special tools needed to ensure proper operation in the vehicle

Specifications:

Connector Gender:

Female

Connector Shape:

Oval

Mounting Type:

Screw-In

Overall Length:

12.2 in.

Overall Length:

310 mm

Programming Required:

Yes

Sensor Type:

Heated

Terminal Gender:

Male

Thread Diameter:

18 mm

Thread Size:

M18x1.5

Universal Or Specific Fit:

Specific

Wire Quantity:

Wiring Harness Length:

10.14 in.

Wiring Harness Length:

257.5 mm

Country of Origin:

Select a vehicle to narrow ACDelco 55488558 Oxygen Sensor fitment info!

Last Updated: 04/30/2024

Years

Vehicle

Per Vehicle

Position

Fit Notes

Fitment Notes

Buick Envision

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904

Buick Envision

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904

1 Per Vehicle

Cadillac CT4

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

Cadillac CT4

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

1 Per Vehicle

Cadillac CT4

2.7L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904
Eng: L3B
8th VIN Digit: L

Cadillac CT4

2.7L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: L3B
8th VIN Digit: L

1 Per Vehicle

Cadillac CT5

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

Cadillac CT5

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

1 Per Vehicle

2019

Cadillac CT6

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

Cadillac CT6

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904

Cadillac XT4

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904

1 Per Vehicle

2022

Cadillac XT4

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904
EURO 6D EMISSION SYSTEM(NCL)

Cadillac XT4

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
EURO 6D EMISSION SYSTEM(NCL)

1 Per Vehicle

2022

Cadillac XT4

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

MATING CONN USE 19330904
JAPAN WLTP EMISSION SYSTEM(NM9)

Cadillac XT4

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
JAPAN WLTP EMISSION SYSTEM(NM9)

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

1 Downstream Left (Driver)

TIER 3 FEDERAL EMISSION SYSTEM(NTB),SULEV30 CALIFORNIA EMISSIONS(NUG),SULEV30 KOREAN EMISSIONS(NUL)
MATING CONN USE 19330904

Cadillac XT4

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) TIER 3 FEDERAL EMISSION SYSTEM(NTB),SULEV30 CALIFORNIA EMISSIONS(NUG),SULEV30 KOREAN EMISSIONS(NUL)
MATING CONN USE 19330904

1 Per Vehicle

SAVE 10% SITEWIDE Click to Apply

ACDelco 55488558 Oxygen Sensor

Product Information

Description:

Features and Benefits:

Specifications:

Select a vehicle to narrow ACDelco 55488558 Oxygen Sensor fitment info!

Buick Envision 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904

Buick Envision

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904 1 Per Vehicle

Cadillac CT4 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904Eng: LSY8th VIN Digit: K

Cadillac CT4

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904Eng: LSY8th VIN Digit: K 1 Per Vehicle

Cadillac CT4 2.7L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904Eng: L3B8th VIN Digit: L

Cadillac CT4

2.7L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904Eng: L3B8th VIN Digit: L 1 Per Vehicle

Cadillac CT5 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904Eng: LSY8th VIN Digit: K

Cadillac CT5

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904Eng: LSY8th VIN Digit: K 1 Per Vehicle

Cadillac CT6 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904Eng: LSY8th VIN Digit: K

Cadillac CT6

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904Eng: LSY8th VIN Digit: K 1 Per Vehicle

Cadillac XT4 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904

Cadillac XT4

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904 1 Per Vehicle

Cadillac XT4 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904 EURO 6D EMISSION SYSTEM(NCL)

Cadillac XT4

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904 EURO 6D EMISSION SYSTEM(NCL) 1 Per Vehicle

Cadillac XT4 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904 JAPAN WLTP EMISSION SYSTEM(NM9)

Cadillac XT4

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904 JAPAN WLTP EMISSION SYSTEM(NM9) 1 Per Vehicle

Cadillac XT4 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

TIER 3 FEDERAL EMISSION SYSTEM(NTB),SULEV30 CALIFORNIA EMISSIONS(NUG),SULEV30 KOREAN EMISSIONS(NUL) MATING CONN USE 19330904

Cadillac XT4

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) TIER 3 FEDERAL EMISSION SYSTEM(NTB),SULEV30 CALIFORNIA EMISSIONS(NUG),SULEV30 KOREAN EMISSIONS(NUL) MATING CONN USE 19330904 1 Per Vehicle

Cadillac XT4 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904

Cadillac XT4

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904 1 Per Vehicle

Cadillac XT5 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904Eng: LSY8th VIN Digit: 4

Cadillac XT5

2.0L L4 Gas DOHC Turbo Downstream Left (Driver) MATING CONN USE 19330904Eng: LSY8th VIN Digit: 4 1 Per Vehicle

Cadillac XT6 2.0L L4 Gas DOHC Turbo

1

Downstream Left (Driver)

MATING CONN USE 19330904Eng: LSY8th VIN Digit: 4

SAVE 10% SITEWIDE
Click to Apply

Buick Envision

2.0L L4 Gas DOHC Turbo

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904

1 Per Vehicle

Cadillac CT4

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

1 Per Vehicle

Cadillac CT4

2.7L L4 Gas DOHC Turbo

MATING CONN USE 19330904
Eng: L3B
8th VIN Digit: L

2.7L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: L3B
8th VIN Digit: L

1 Per Vehicle

Cadillac CT5

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

1 Per Vehicle

Cadillac CT6

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: K

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
EURO 6D EMISSION SYSTEM(NCL)

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
EURO 6D EMISSION SYSTEM(NCL)

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
JAPAN WLTP EMISSION SYSTEM(NM9)

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
JAPAN WLTP EMISSION SYSTEM(NM9)

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

TIER 3 FEDERAL EMISSION SYSTEM(NTB),SULEV30 CALIFORNIA EMISSIONS(NUG),SULEV30 KOREAN EMISSIONS(NUL)
MATING CONN USE 19330904

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) TIER 3 FEDERAL EMISSION SYSTEM(NTB),SULEV30 CALIFORNIA EMISSIONS(NUG),SULEV30 KOREAN EMISSIONS(NUL)
MATING CONN USE 19330904

1 Per Vehicle

Cadillac XT4

2.0L L4 Gas DOHC Turbo

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904

1 Per Vehicle

Cadillac XT5

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: 4

2.0L L4 Gas DOHC Turbo

Downstream Left (Driver) MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: 4

1 Per Vehicle

Cadillac XT6

2.0L L4 Gas DOHC Turbo

MATING CONN USE 19330904
Eng: LSY
8th VIN Digit: 4