What are the symptoms of a bad ignition coil?

A failing ignition coil can cause several symptoms, including the “Check Engine Light” appears, engine misfires, difficulty starting the vehicle, reduced fuel economy and loss of power during acceleration.

How often should spark plugs be replaced?

Spark plug replacement intervals depend on the type of spark plug and the vehicle’s engine. Refer to your vehicle’s Owner’s Manual for more information.

How can I tell if my distributor cap and rotor need replacing?

Distributor caps and rotors typically need replacement when you notice engine misfires, difficult vehicle startup, reduced engine performance, corrosion or carbon tracking on the cap, or cracks or wear on the rotor.

What is the difference between glow plugs and spark plugs?

Glow plugs are used in diesel engines to preheat the combustion chamber for a cold start. Spark plugs are used in gasoline engines to ignite the air and fuel mixture.

Does the "Service Engine Soon" light tell me when my vehicle needs a tune-up?

No. The "Service Engine Soon" light comes on when the vehicle’s computer detects a minor malfunction, an engine emissions issue or that routine maintenance is needed. For more information, refer to your vehicle owner's manual.

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GM Genuine Parts D1539J (25981009) Brake Light Switch

Product ID: 3855465

Details

Brand
GM GENUINE
Circuit Type
1-way
Connector Type
Plug In
Contact Type
Normally Open
Item dimensions L x W x H
3.9 x 2.1 x
Material
Plastic

⚡5V operating voltage

🔧OE-spec fit & function

🛠️12-month/12,000-mile warranty

$70.35

Duties & taxes included

In stock

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Description

🚦 Stop in style with GM Genuine precision!

DURABILITY YOU CAN TRUST - Backed by GM Genuine Parts quality and a 12-month/12,000-mile warranty for peace of mind.
PRECISION OE ENGINEERING - Manufactured to exact GM specifications for seamless integration and reliable performance.
PLUG AND PLAY INSTALLATION - Designed for easy, hassle-free replacement with a simple plug-in connector and hinge lever actuator.
CRUISE CONTROL COMPATIBILITY - Restores flawless cruise control function by resolving common brake switch faults—drive smarter, not harder.
INSTANT BRAKE LIGHT ACTIVATION - Electrically triggers brake lights the moment you press the pedal, enhancing safety and communication on the road.

The GM Genuine Parts D1539J Brake Light Switch is a factory-recommended replacement engineered to meet GM OE standards. Operating at 5 volts with a reliable hinge lever actuator, it ensures instant brake light activation and restores cruise control functionality. Designed for easy plug-and-play installation, this durable switch is backed by a 12-month/12,000-mile warranty, making it the smart choice for GM vehicle owners who demand quality and performance.

Specifications

ASIN	B001KSGJKQ
Actuator Type	Hinge Lever
Best Sellers Rank	#19,885 in Automotive ( See Top 100 in Automotive ) #51 in Automotive Interior Switches
Brand Name	GM GENUINE PARTS
Circuit Type	1-way
Color	Black
Compatible Devices	GM vehicles
Compatible with Vehicle Type	car
Connectivity Protocol	X-10
Connector Type	Plug In
Contact Material	Gold Or Silver
Contact Type	Normally Open
Control Method	Touch
Control Type	mechanical
Controller Type	Push Button
Customer Reviews	4.8 4.8 out of 5 stars (4,840)
Included Components	25981009
International Protection Rating	IP00
Item Dimensions	3.9 x 2.1 x 0.9 inches
Item Type Name	Brake Light Switch
Item Weight	0.27 g
Manufacturer	ACDelco
Material Type	Plastic
Model	D1539J
Mounting Type	Through Hole Mount
Number of Items	1
Number of Positions	2
Operation Mode	manual
Part Number	25981009
Specification Met	Oe
Switch Type	Push Button
Terminal	Blade
UPC	707773543177
Unit Count	1 Count
Warranty Description	12 Months / 12,000 Miles (Parts Only)

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