AUTO REPAIR SERVICE

Certified Service Auto Repair and Car Maintenance Service

Hear a rattle? Smell something unusal? Is your car or truck just not feeling “right”? These can all be small signs of a bigger problem. Knowing what to look for between regular maintenance visits can help keep a small issue from becoming a major auto repair.

Below you will find an overview of all the major systems and auto parts within your vehicle and signs of significant wear and tear. When the time is right, or if you ever have concerns, bring your vehicle back to your Chevrolet, Buick, GMC, or Cadillac dealer for any type of auto repair service — major or minor. Your Certified Service technician is trained to know every inch of your vehicle.


HVAC & ENGINE COOLING

Accumulator/Drier
Limited Lifetime Parts Warranty Protection
The accumulator in your vehicle gathers and stores liquid refrigerant until it’s converted into a gas refrigerant.                                            
Sign of wear:
Lack of or insufficient cooling in the cabin
Thermostat
The thermostat regulates the temperature of the engine coolant to maintain proper engine operating temperature.
Signs of wear: 

Engine overheats

Reduced fuel economy

Insufficient heat in cabin
Compressor
Limited Lifetime Parts Warranty Protection
The compressor compresses refrigerant. The compression leads to a change in the refrigerant’s boiling point that helps create the cold air that is delivered through the HVAC system.
Signs of wear:
Lack of or insufficient cooling
Excessive clicking sounds or unusual noises during A/C operation
Water Pump
Limited Lifetime Parts Warranty Protection
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: 

Engine overheating
Leaking coolant
Condenser
Limited Lifetime Parts Warranty Protection
The condenser cools refrigerant gas back into a liquid state.
Sign of wear:
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:
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:
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: 

Engine overheats

Fan doesn’t turn
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:
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:
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:
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: 

Leaking (often a bright green color)

Engine overheats

Sweet smell

IGNITION & BATTERY

Ignition Coil
Limited Lifetime Parts Warranty Protection
The ignition coil increases voltage, creating a surge of energy within your vehicle’s electrical system in order to better ignite the air/fuel mixture within your engine.
Signs of wear:
Engine won’t start
Engine misfiring 

Visible cracks in coil body
Spark Plug
Spark plugs provide the spark that ignites the air/fuel mixture within an engine’s cylinders.
Signs of wear:
Lack of power

Sluggish acceleration

Poor fuel economy
Ignition Modules
Limited Lifetime Parts Warranty Protection
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:
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:
Difficult engine starting

Misfiring

Decreased fuel economy
Starting Motor & Solenoid
Limited Lifetime Parts Warranty Protection
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:
Poor starting qualities including repeated starting attempts

Grinding while cranking
Intermittent starter engagement while trying to start the engine
Alternator
Limited Lifetime Parts Warranty Protection
Your car’s alternator provides power to electrical systems and charges the battery while the vehicle is running.
Signs of wear:
Engine won’t turn over
Loss of battery power

Some loss of electrical power
Alternator warning light illuminates

Dim headlights
Battery
Your car’s battery supplies and stores electrical energy from the alternator when the vehicle’s engine is running. The car 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:
Slow cranking

Weak/dim lights while cranking
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:
Inability to start engine
Poor starting qualities
Misfiring
Decreased fuel economy

FUEL & ENGINE EMISSIONS

Modular Fuel Pump/Sender
Limited Lifetime Parts Warranty Protection
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:
Difficult engine starting

Slow acceleration qualities

Intermittent power loss
Inaccurate fuel gauge reading
Muffler & Tailpipe
The exhaust muffler reduces the noise levels of the engine exhaust by the use of tuning tubes. The tuning tubes create channels inside the exhaust muffler that lower the sound levels created by the combustion of the engine. The tailpipe carries the exhaust gases from the muffler to the rear of your vehicle.
Signs of wear:
Exhaust is louder
Clunking noise in rear of vehicle
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:
Engine won’t start

Reduced or loss of engine power

“Service Engine Soon” light illuminates
Exhaust Gas Recirculation Valve (EGR)

The EGR valve recirculates some of the engine’s exhaust gas back into the intake manifold to be reburned, reducing emissions.
Signs of wear:
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:
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:
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:
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:
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:
“Service Engine Soon” light illuminates
Knock Sensor
Constantly measures the spark knock from the engine so the engine control module can adjust the ignition timing to reduce it.
Sign of wear:
“Service Engine Soon” light illuminates
Throttle Position Sensor (throttle body)
Constantly measures the opening of the throttle body as you depress the accelerator.
Sign of wear:
“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.
Sign of wear:
“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:
Ticking noise from engine
“Service Engine Soon” light illuminates
Fuel Composition Sensor
On vehicles equipped to run on E85 ethanol, this sensor constantly measures the amount of ethanol in the fuel.
Sign of wear:
“Service Engine Soon” light illuminates
Positive Crankcase Ventilation (PCV) Valve
Your vehicle’s PCV valve was designed to regulate unspent combustion gasses so they can be burned in the engine.
Signs of wear:
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 to reduce hydrocarbons, carbon monoxide, and oxides of nitrogen pollutants from the exhaust gas.
Signs of wear:
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:
Exhaust is louder
Clunking noise in rear of vehicle

DRIVELINE & POWERTRAIN

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 reduce friction and increase your control of the vehicle as the wheel turns over the surface of the road.
Signs of wear:
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:
Lubricant leak

Clicking sounds during turning

Clunks during acceleration
Front-end vibrations
Engine
The engine is the heart of your vehicle. Most engines use combustion (igniting an air/fuel mixture to create mechanical energy) to generate power that is delivered to the wheels, which in turn propels the vehicle.
Signs of wear:
Rough running
High oil or fuel consumption

Visible smoke while engine is running
Transmission/Transaxle
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 applications.
Signs of wear:
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:
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 transmissions.
Signs of wear:
Noticeable transmission slippage

Lack of acceleration 

Failure to engage
Erratic transmission operation
Clutch
Manual vehicles use this combination of components to engage and disengage the engine to and from the transmission for changing gears.
Signs of wear:
Clutch slippage

Clutch engage failure

SUSPENSIONS

Shocks & Struts
Limited Lifetime Parts Warranty Protection
The ride and handling system supports your vehicle’s weight, keeps the wheels in contact with the road, and helps provide a comfortable ride.
Signs of wear:
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
Control Arm
Control arms join wheel hubs to the vehicle frame, allowing for a full range of motion while maintaining proper wheel alignment.
Signs of wear: 

Uneven tire wear

Suspension noise or misalignment
Steering wheel wobble or vibration
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:
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:
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:
Excessive steering wheel play
Hard steering

Noise

Wobble
Irregular tire wear

STEERING PARTS

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:
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: 

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: 

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:

“Wandering” and excessive steering with little directional change
Tie-Rod End
The tie-rod end connects or ties the steering linkage to the wheel hub assembly, allowing for the transfer of motion to the wheel.
Signs of wear:
Rough or stuttered steering
Play in steering wheel
Inner or outer tire edge wear

BELTS, HOSES & FILTERS

V-Ribbed Serpentine Belt
This belt transfers power from the crankshaft to the alternator, water pump, air conditioning compressor, and power-steering pump (if applicable).
Signs of wear:
Slipping and/or squealing belt
Dimming headlights while driving
Loss of battery charging
Cabin Air Filter
Cabin air filters prevent a majority of airborne particles from entering the cabin.
Sign of wear:
Decreased climate control (heating and A/C) airflow
Timing Chain/Belt
Your vehicle’s timing chain/belt synchronizes the engine’s camshaft and crankshaft.
Signs of wear: 

Engine stops
Engine backfires
Air Conditioning Hose
Refrigerant stored under high pressure is transferred from your vehicle’s evaporator in the engine compartment to the condenser in front of the radiator.
Sign of wear:
A/C inoperative
Heater Hose
The heater hose within your vehicle routes the hot engine coolant to the heater core to heat the cabin.
Signs of wear:
Coolant leak

Cracking/hardening/brittleness of hose
Radiator Hose
The radiator hose moves coolant from the engine to the radiator to be cooled.
Signs of wear:
Leaking
Elevated engine temperature

Coolant leak

Cracking/hardening/brittleness of hose

“Check Engine” light illuminates
Engine Air Filters
These filters prevent harmful debris from entering your engine.
Signs of wear:
Sluggish acceleration

Decreased fuel efficiency
Oil Filter
Your vehicle’s oil filter cleans engine oil to help reduce wear on the engine’s internal components.
Signs of wear:
Oil leaks
Burning oil smell
Automatic Transmission Filter
This filter keeps certain abrasive particles in the transmission fluid from reaching the transmission’s internal components.
Signs of wear:
Late shifts
Slipping in and out of gear
In-Line Fuel Filter
This filter was designed to trap fuel contaminants before they enter the engine’s fuel delivery system.
Signs of wear:
Lack of power

Vehicle will not start

Vehicle only runs in idle or low speeds

Oil Change: 5-Quart Oil Change, Tire Rotation, and Vehicle Inspection for $39.95
Complimentary Car Battery Test
Brake Service: ACDelco Professional DuraStop Brake Pads Installed for $99.95