AUTO PARTS

Accumulator/Drier:

The accumulator in your vehicle gathers and stores liquid refrigerant until it’s converted into a gas refrigerant.

Sign of wear may include:

• Lack of or insufficient cooling in cabin

Compressor:

The compressor compresses refrigerant. The compression leads to a change in the refrigerant’s boiling point, which helps create the cold air that is delivered through the HVAC system.

Signs of wear may include:

• Lack of or insufficient cooling
• Excessive clicking sounds or unusual noises during A/C operation

Water Pump:

The water pump is responsible for circulating engine coolant through the radiator and engine system to help maintain optimal engine operating temperatures.

Signs of wear may include:

• Engine overheating
• Leaking coolant

Condenser:

The condenser cools refrigerant gas back into a liquid state.

Sign of wear may include:

• Reduced cooling capacity in vehicle cabin due to physical damage or debris

Compressor Clutch:

A critical component of your HVAC system, the compressor clutch engages and disengages your compressor.

Signs of wear may include:

• Reduced cooling in vehicle interior
• Noise when running A/C system
• Rubbing/grinding noise when A/C is off

Blower Motor:

Your vehicle’s blower motor drives air through the HVAC system and into your cabin.

Signs of wear may include:

• Lack of or diminished airflow through cabin vents
• Unusual noises coming from blower motor

Engine Cooling Fan:

The engine cooling fan, located behind your radiator, draws cool outside air through the condenser and radiator at low-speed operation to cool the engine.

Signs of wear may include:

• Engine overheats
• Fan doesn’t turn on
• Poor A/C performance

Expansion Valve:

The expansion valve restricts the flow of refrigerant, allowing it to change from a high-pressure liquid to a low-pressure gas, which provides the cooling effect of A/C.

Sign of wear may include:

• Lack of cooling in cabin

Evaporator:

Warm air from inside your vehicle is delivered to your evaporator. Moisture and heat are then removed from the air and returned to your cabin.

Sign of wear may include:

• Lack of cooling in cabin

Heater Core:

Hot engine coolant from the cooling system circulates through the heater core to provide warm air to the passenger compartment.

Signs of wear may include:

• Sweet smell coming from vents
• Insufficient heat from vents
• Wet carpet on passenger side

Radiator:

Engine coolant flowing through the radiator is cooled by wind and the radiator fan, helping to keep the engine within proper operating temperatures.

Signs of wear may include:

• Leaking (often a bright green color)
• Engine overheats
• Sweet smell

Alternator/Generator:

Your car’s alternator/generator provides power to electrical systems and charges the battery while the vehicle is running.

Signs of wear may include:

• Engine won’t turn over
• Loss of battery power
• Some loss of electrical power
• Alternator warning light illuminates
• Dim headlamps

Ignition Coil:

The ignition coil increases electrical system voltage to help ignite the air/fuel mixture.

Signs of wear may include:

• Engine won’t start
• Engine misfiring
• Visible cracks in coil body

Ignition Modules:

Later-model vehicles with a distributor and coil pack use an ignition module as a switch that, when engaged, supplies power to the coil, which in turn creates the spark that ignites the air/fuel mixture.

Signs of wear may include:

• Engine won’t start
• Engine misfiring
  

Ignition Wire Set: Limited Lifetime Parts Warranty Protection

This specialized wire set carries voltage from the ignition coil, electronic coil pack, or distributor to the spark plugs.

Signs of wear may include:

• Difficult engine starting
• Misfiring
• Decreased fuel economy

Starting Motor & Solenoid:

When starting the engine, the solenoid is energized, which engages the starter pinion into the flywheel, while the starter motor drives the pinion to crank the engine.

Signs of wear may include:

• Poor starting qualities, including repeated starting attempts
• Grinding while cranking
• Intermittent starter engagement while trying to start the engine
  

Battery: Learn More

Your vehicle’s battery supplies and stores electrical energy from the alternator when the vehicle’s engine is running. The vehicle’s battery provides energy to start the engine, plus supplies power to accessories when the engine is not running. For the best combination of longevity, power, and price, we proudly offer a wide range of ACDelco batteries.

Signs of wear may include:

• Slow cranking
• Weak/dim lights while cranking
  

Distributor Cap:

Distributor Cap:Vehicles equipped with a distributor use the distributor cap to act as a hub for spark plug and ignition coil wires.

Signs of wear may include:

• Inability to start engine
• Poor starting qualities
• Misfiring
• Decreased fuel economy
  

Modular Fuel Pump/Sender:

This two-part component delivers fuel from your tank to the fuel injectors while monitoring and sending fuel-level information to your fuel gauge.

Signs of wear may include:

• Difficulty starting engine
• Slow acceleration qualities
• Intermittent power loss
• Inaccurate fuel gauge reading

Engine Control Module (ECM):

This module monitors and synchronizes the operation of the ignition, emission, and fuel-injection systems. All sensors input information to the ECM to constantly adjust the air/fuel mixture for optimum emissions, drivability, and performance.

Signs of wear may include:

• Engine won’t start
• Reduced or loss of engine power
• "Service Engine Soon” light illuminates
  

Exhaust Gas Recirculation (EGR) Valve:

The EGR valve recirculates some of the engine’s exhaust gas back into the intake manifold to be reburned, reducing emissions.

Signs of wear may include:

• Rough-running engine
• Engine hesitation or stalling
• “Service Engine Soon” light illuminates
  

Fuel Injector:

The fuel injector sprays a fine mist of fuel into a vehicle’s intake manifold or cylinders a fraction of a second before the spark plug ignites it.

Signs of wear may include:

• Sluggish engine performance
• Poor acceleration
• “Service Engine Soon” light illuminates

Mass Air Flow Sensor:

This sensor measures the amount of air entering the engine.

Signs of wear may include:

• Engine hesitation
• Stalling
• Decline in engine performance
• “Service Engine Soon” light illuminates
  

Oxygen Sensor:

The oxygen sensor measures the amount of leftover oxygen from the combustion process in the exhaust.

Signs of wear:

• Rough-running engine
• Poor fuel economy
• “Service Engine Soon” light illuminates
  

Engine Coolant Temperature Sensor:

Constantly measures the engine’s coolant temperature.

Signs of wear may include:

• Cooling fan(s) on high all the time
• Poor fuel economy
• “Service Engine Soon” light illuminates
  

Intake Air Temperature Sensor:

Constantly measures the temperature of the incoming air to the engine.

Signs of wear may include:

• Rough-running engine
• Poor fuel economy
• “Service Engine Soon” light illuminates

Humidity Sensor:

Constantly measures the humidity of the incoming air to the engine.

Sign of wear may include:

• “Service Engine Soon” light illuminates

Knock Sensor:

Constantly measures the spark knock from the engine so the ECM can adjust the ignition timing to reduce it.

Signs of wear may include:

• Lack of power
• “Service Engine Soon” light illuminates
  

Throttle Position Sensor (throttle body):

Constantly measures the opening of the throttle body as you depress the accelerator.

Signs of wear may include:

• “Reduced Engine Power” light illuminates
  

Accelerator Pedal Position Sensor:

Constantly measures the amount the accelerator is depressed so the ECM can open the throttle proportionately to increase acceleration.

Signs of wear may include:

• “Reduced Engine Power” light illuminates
  

Fuel Pressure Sensor:

Constantly measures the fuel pressure in the fuel rail so the ECM can maintain the pressure at optimum levels.

Signs of wear may include:

• Ticking noise from engine
• “Service Engine Soon” light illuminates

Positive Crankcase Ventilation (PCV) Valve:

Your vehicle’s PCV valve is designed to regulate unspent combustion gases so they can be burned in the engine.

Signs of wear may include:

• Engine runs rough or unexpectedly stalls
• “Service Engine Soon” light illuminates

Catalytic Converter(s):

The catalytic converter is an emission control device added to the engine exhaust system in order to help reduce hydrocarbons, carbon monoxide, and oxides of nitrogen pollutants from the exhaust gas.

Signs of wear may include:

• Exhaust is louder
• Rotten-egg smell

Resonator:

Some exhaust systems are equipped with a resonator. The resonator, located either before or after the muffler, allows the use of mufflers with less back pressure. Resonators are used when vehicle characteristics require specific exhaust tuning.

Signs of wear may include:

• Exhaust is louder
• Clunking noise in rear of vehicle

Wheel Bearing: Limited Lifetime Parts Warranty Protection

The wheel bearing is mounted on a wheel hub, which in turn is connected to the axle. The bearings help reduce friction and increase your control of the vehicle as the wheel turns over the surface of the road.

Signs of wear may include:

• Grinding
• Whining or squealing noises
• Looseness or roughness felt in the steering wheel
  

CV Joint/Boot:

The CV boot protects the CV joint (in front-wheel-drive automatic transaxle vehicles) from harmful moisture, sand, dust, and other roadway debris. If the boot is worn or damaged, these particles can eat away at the CV joint, potentially causing the need to replace the CV joint or even a half axle.

Signs of wear may include:

• Lubricant leak
• Clicking sounds during turning
• Clunks during acceleration
• Front-end vibrations
  

Engine: Learn More

The engine is the heart of your vehicle. Most engines use combustion (igniting an air/fuel mixture to create mechanical energy) to create power that is delivered to the wheels, which in turn propels the vehicle..

Signs of wear may include:

• Rough running
• High oil or fuel consumption
• Visible smoke while engine is running
  

Transmission/Transaxle: Learn More

The transmission/transaxle in your vehicle uses a combination of hydraulics and gears to transfer power from the engine to the wheels. Transmissions are utilized in rear-wheel-drive applications and transaxles on front-wheel-drive.

Signs of wear may include:

• Noticeable transmission/transaxle slippage
• Lack of acceleration
• Transmission fluid emits a burning odor
  

Differential/Rear Axle:

The differential receives power from the drive shaft and delivers power to rear-drive wheels through a series of gears.

Signs of wear may include:

• Clanking noise
• Whining or humming noise at steady speed or during coast down
  

Flywheel:

This round, multi-toothed disc connects the engine, clutch system, and automatic transmission.

Signs of wear may include:

• Noticeable transmission slippage
• Lack of acceleration
• Failure to engage
• Erratic transmission operation
  

Shocks & Struts: Limited Lifetime Parts Warranty Protection

The ride and handling system supports your vehicle’s weight, helps keeps the wheels in contact with the road, and helps provide a comfortable ride.

Signs of wear may include:

• Excessive ball joint play
• Leaking oil along the shock body
• Broken mounts or mounting hardware
• Worn or missing bushings
• Excessive vehicle bounce
• Cupped tire wear
  

Shock Absorber: Limited Lifetime Parts Warranty Protection

The shock absorbers on your vehicle help minimize spring bounce, helping to keep wheels in contact with the road and providing a smoother ride.

Signs of wear may include:

• Excessive vehicle bounce
• Cupped tire wear
  

Strut Mount/Bearing:

The strut mount helps improve strut operation by absorbing energy and restoring smooth steering, while the bearing allows the strut to turn with the wheels while steering.

Signs of wear:

• Suspension noise
• Uneven tire wear
• Steering wheel does not easily return to center position
  

Ball Joint:

The ball joint is a pivot point for the wheel assembly, allowing the wheels to turn and move up and down with the suspension.

Signs of wear may include:

• Rough ride
• Play in steering-wheel
• Slow or stiff steering-wheel return
• Excessive tire wear on one side
  

Coil Springs:

Your suspension system’s coil springs support the weight of your vehicle and maintain vehicle ride height.

Signs of wear may include:

• Low vehicle ride height
• Rough, unstable, or uncontrollable ride
• Excessive tire wear on one side
  

Bushing:

The bushings attached to the suspension system provide a cushioned link between control arms and chassis.

Signs of wear may include:

• Excessive steering-wheel play
• Hard steering
• Noise
• Wobble
• Irregular tire wear
  

Power Steering:

The hydraulic power-steering pump is a constant displacement pump that provides hydraulic pressure and flow for the power-steering gear. The hydraulic power-steering pump is belt-driven off your engine.

Signs of wear may include:

• Fluid leakage
• Difficult low-speed steering
• Whining noise while turning
• Steering-wheel wobble
• Pump housing leakage

Rack-and-Pinion:

This steering assembly uses a long steel bar that is meshed with a pinion gear and connected to rods that turn the front wheels. The rack-and-pinion can be hydraulically assisted by a power-steering pump or electrically assisted.

Signs of wear may include:

• Excessive play in steering wheel
• Steering-wheel vibration
• Unusual noises while turning the wheel
  

Idler Arm:

The idler arm in your vehicle acts as a pivot point to the steering linkage assembly.

Sign of wear may include:

• Irregular tire wear, such as feathering or scrubbing
  

Pitman Arm:

On vehicles that utilize a steering gear, the pitman arm connects the steering gear and steering linkage.

Sign of wear may include:

• “Wandering” and excessive steering with little directional change