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  2. Auto Parts
  3. Lighting and Electrical
  4. Electrical Connectors
  5. Auto Headlight Control Relay Connector
  6. ACDelco PT1821 for 2007

ACDelco PT1821 Auto Headlight Control Relay Connector
for 2007 (please select make/model)

ACDelco PT1821 Auto Headlight Control Relay Connector - 2007

ACDelco
Brand:ACDelco
Part Number: PT1821
UPC: 00021625983042
Weight: 0.14 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

CONNECTORS (B)

ACDelco GM Original Equipment Pigtail Connectors are connectors ready to be spliced into vehicle harnesses, and are GM-recommended replacements for your vehicle's original components. These original equipment pigtail connectors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Color-coded wires allow for easy installation
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Manufactured to GM OE specification for fit, form, and function
  • Offering the quality, reliability, and durability of GM OE
  • Protective outer coverings help provide long-lasting durability

Specifications:

Color:
Black
Gender:
Male
Programming Required:
No
Shape:
Square
Terminal Gender:
Female
Terminal Quantity:
5
Terminal Type:
Blade
Wire Quantity:
5
Country of Origin:
MX

Select a vehicle to narrow ACDelco PT1821 Auto Headlight Control Relay Connector fitment info!

Last Updated: 01/22/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2011

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 
Cadillac STS

3.6L V6 Gas DOHC
1
 
Washer Pump Relay Connector
GM Original Equipment
 

Cadillac STS



3.6L V6 Gas DOHC Washer Pump Relay Connector
GM Original Equipment

1 Per Vehicle

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 

2010

 

2009

 

2008

 

2007

 

2006

 

2005

 
Cadillac STS

4.6L V8 Gas DOHC
1
 
Washer Pump Relay Connector
GM Original Equipment
 

Cadillac STS



4.6L V8 Gas DOHC Washer Pump Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Cadillac STS

3.6L V6 Gas DOHC,
4.4L V8 Gas DOHC Supercharged,
4.6L V8 Gas DOHC
1
 
Windshield Wiper Motor Relay Connector
GM Original Equipment
5-WAY FEMALE BLACK
RWD
 

Cadillac STS



3.6L V6 Gas DOHC,
4.4L V8 Gas DOHC Supercharged,
4.6L V8 Gas DOHC Windshield Wiper Motor Relay Connector
GM Original Equipment
5-WAY FEMALE BLACK
RWD

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Cadillac STS

3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC
1
 
Windshield Wiper Motor Relay Connector
GM Original Equipment
5-WAY FEMALE BLACK
AWD
 

Cadillac STS



3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC Windshield Wiper Motor Relay Connector
GM Original Equipment
5-WAY FEMALE BLACK
AWD

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2009

 

2008

 

2007

 

2006

 
Cadillac STS

4.4L V8 Gas DOHC Supercharged
1
 
Ambient Light Sensor Connector
GM Original Equipment
 

Cadillac STS



4.4L V8 Gas DOHC Supercharged Ambient Light Sensor Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2009

 

2008

 

2007

 

2006

 
Cadillac STS

4.4L V8 Gas DOHC Supercharged
1
 
GM Original Equipment
5-WAY FEMALE BLACK
RWD
 

Cadillac STS



4.4L V8 Gas DOHC Supercharged GM Original Equipment
5-WAY FEMALE BLACK
RWD

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2009

 

2008

 

2007

 

2006

 
Cadillac STS

4.4L V8 Gas DOHC Supercharged
1
 
Washer Pump Relay Connector
GM Original Equipment
 

Cadillac STS



4.4L V8 Gas DOHC Supercharged Washer Pump Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2009

 

2008

 

2007

 

2006

 

2005

 
Cadillac STS

3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC
1
 
Ambient Light Sensor Connector
GM Original Equipment
 

Cadillac STS



3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC Ambient Light Sensor Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2009

 

2008

 

2007

 

2006

 

2005

 
Cadillac STS

3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC
1
 
GM Original Equipment
5-WAY FEMALE BLACK
AWD
 

Cadillac STS



3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC GM Original Equipment
5-WAY FEMALE BLACK
AWD

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2009

 

2008

 

2007

 

2006

 

2005

 
Cadillac STS

3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC
1
 
GM Original Equipment
5-WAY FEMALE BLACK
RWD
 

Cadillac STS



3.6L V6 Gas DOHC,
4.6L V8 Gas DOHC GM Original Equipment
5-WAY FEMALE BLACK
RWD

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Back Up Light Switch Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Back Up Light Switch Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Daytime Running Lamp Relay Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Daytime Running Lamp Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Fuel Heater Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Fuel Heater Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Interior Light Relay Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Interior Light Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Neutral Safety Switch Relay Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Neutral Safety Switch Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Starter Motor Relay Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Starter Motor Relay Connector
GM Original Equipment

1 Per Vehicle

2008

 

2007

 

2008

 

2007

 
Chevrolet T6500

7.8L L6 Diesel Turbo
1
 
Body Wiring Harness Relay Connector
GM Original Equipment
 

Chevrolet T6500



7.8L L6 Diesel Turbo Body Wiring Harness Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Back Up Light Switch Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Back Up Light Switch Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Daytime Running Lamp Relay Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Daytime Running Lamp Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Fuel Heater Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Fuel Heater Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Interior Light Relay Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Interior Light Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Neutral Safety Switch Relay Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Neutral Safety Switch Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Starter Motor Relay Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Starter Motor Relay Connector
GM Original Equipment

1 Per Vehicle

2007

 

2007

 
Chevrolet T7500

7.8L L6 Diesel Turbo
1
 
Body Wiring Harness Relay Connector
GM Original Equipment
 

Chevrolet T7500



7.8L L6 Diesel Turbo Body Wiring Harness Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T8500

7.8L L6 Diesel Turbo
1
 
Back Up Light Switch Connector
GM Original Equipment
 

Chevrolet T8500



7.8L L6 Diesel Turbo Back Up Light Switch Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T8500

7.8L L6 Diesel Turbo
1
 
Daytime Running Lamp Relay Connector
GM Original Equipment
 

Chevrolet T8500



7.8L L6 Diesel Turbo Daytime Running Lamp Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T8500

7.8L L6 Diesel Turbo
1
 
Fuel Heater Connector
GM Original Equipment
 

Chevrolet T8500



7.8L L6 Diesel Turbo Fuel Heater Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T8500

7.8L L6 Diesel Turbo
1
 
Interior Light Relay Connector
GM Original Equipment
 

Chevrolet T8500



7.8L L6 Diesel Turbo Interior Light Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T8500

7.8L L6 Diesel Turbo
1
 
Neutral Safety Switch Relay Connector
GM Original Equipment
 

Chevrolet T8500



7.8L L6 Diesel Turbo Neutral Safety Switch Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
Chevrolet T8500

7.8L L6 Diesel Turbo
1
 
Starter Motor Relay Connector
GM Original Equipment
 

Chevrolet T8500



7.8L L6 Diesel Turbo Starter Motor Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Back Up Light Switch Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Back Up Light Switch Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Body Wiring Harness Relay Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Body Wiring Harness Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Daytime Running Lamp Relay Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Daytime Running Lamp Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Fuel Heater Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Fuel Heater Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Interior Light Relay Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Interior Light Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Neutral Safety Switch Relay Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Neutral Safety Switch Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T6500

7.8L L6 Diesel Turbo
1
 
Starter Motor Relay Connector
GM Original Equipment
 

GMC T6500



7.8L L6 Diesel Turbo Starter Motor Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Back Up Light Switch Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Back Up Light Switch Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Body Wiring Harness Relay Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Body Wiring Harness Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Daytime Running Lamp Relay Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Daytime Running Lamp Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Fuel Heater Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Fuel Heater Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Interior Light Relay Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Interior Light Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Neutral Safety Switch Relay Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Neutral Safety Switch Relay Connector
GM Original Equipment

1 Per Vehicle

2009

 

2008

 

2007

 

2009

 

2008

 

2007

 
GMC T7500

7.8L L6 Diesel Turbo
1
 
Starter Motor Relay Connector
GM Original Equipment
 

GMC T7500



7.8L L6 Diesel Turbo Starter Motor Relay Connector
GM Original Equipment

1 Per Vehicle

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