Chevrolet Epica EGR Vacuum Modulator Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(15,227)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(15,227)

EGR Vacuum Modulator Replacement Service

How much does a EGR Vacuum Modulator Replacement cost?

On average, the cost for a Chevrolet Epica EGR Vacuum Modulator Replacement is $209 with $114 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2006 Chevrolet EpicaL6-2.5LService typeEGR Vacuum Modulator ReplacementEstimate$343.01Shop/Dealer Price$410.02 - $588.53
2004 Chevrolet EpicaL6-2.5LService typeEGR Vacuum Modulator ReplacementEstimate$323.01Shop/Dealer Price$390.03 - $568.56
2005 Chevrolet EpicaL6-2.5LService typeEGR Vacuum Modulator ReplacementEstimate$323.01Shop/Dealer Price$390.03 - $568.56
Show example Chevrolet Epica EGR Vacuum Modulator Replacement prices

What is the EGR Vacuum Modulator all about?

Your vehicle’s exhaust gas recirculation (EGR) system is used to reduce your engine’s emissions by lowering the combustion chamber temperature. This produces less nitrous oxides, and burns pollutants contained in the exhaust gas that are reintroduced into the intake manifold. If the EGR valve opens and allows exhaust gases into the intake, the engine runs more smoothly and efficiently. However, this is not the case at idle, when the engine needs the most vacuum for proper operation.

If the EGR valve opens at idle, you can experience a rough idle and possibly a knock. Engine power is negatively affected at low RPM’s. Engineers implemented a control that closes the EGR valve when the engine is running at lower RPM’s. The engine produces lower vacuum at lower engine speeds, so it’s natural that the control is modulated by the engine’s own vacuum. The EGR vacuum modulator is a diaphragm that closes when the engine vacuum drops to idle, and opens as soon as the vacuum increases. It’s also known as a vacuum modulated valve. If the EGR vacuum modulator is leaking vacuum, is blocked internally, or is leaking, the Check Engine light will come on and the engine may start to knock.

Keep in mind:

  • The EGR system assists in reducing engine emissions. An improperly operating EGR system can cause a smog test failure.
    • Vacuum hoses become brittle over time. Take precautions to not damage the vacuum hoses when working on the EGR system.

How it's done:

  • The EGR vacuum modulator is verified that it needs to be replaced. The engine top trim cover is removed to access the modulator.

  • The defective EGR vacuum modulator is removed from the bracket near the EGR valve and is disconnected.

  • The new EGR vacuum modulator is installed and reconnected.

  • The engine is started and the EGR vacuum modulator is tested for computer codes and operation.

  • The vehicle is road tested to ensure proper operation of the EGR vacuum modulator.

Our recommendation:

The EGR vacuum modulator does not have a replacement interval. It will likely need replacement at some time because it does contain a filter. It can be inspected any time a vacuum test needs to be performed on the engine vacuum. If the EGR vacuum modulator is deemed to be faulty, you will need to have it replaced by one of our expert technicians.

What common symptoms indicate you may need to replace the EGR Vacuum Modulator?

  • Check Engine light is on
  • Engine knock at idle
  • Engine idles rough

How important is this service?

The EGR system partly controls your vehicle’s emissions, and a faulty EGR vacuum modulator can cause your car to fail a smog test. In addition, your vehicle may not idle, or may knock at idle. It is recommended to replace a faulty EGR vacuum modulator as soon as possible.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Chevrolet mechanics

Real customer reviews from Chevrolet owners like you.

Excellent Rating

(15,227)

Rating Summary
14,268
476
111
84
288
14,268
476
111
84
288

Shane

17 years of experience
267 reviews
Shane
17 years of experience
Chevrolet Traverse V6-3.6L - Tire Rotation - Hutto, Texas
Shane knows my car very well

Brian

23 years of experience
695 reviews
Brian
23 years of experience
Chevrolet Cavalier L4-2.2L - shift cable bushing - Orange Park, Florida
Brian is a most knowledgeable, expert mechanic. I love that he "shows" you what's wrong and then fixes it! I highly recommend Brian for all your auto repairs & maintenance needs!

Joseph

20 years of experience
652 reviews
Joseph
20 years of experience
Chevrolet Impala V6-3.5L - Heater Blower Motor Resistor - Salt Lake City, Utah
showed up early, quick friendly

Joseph

33 years of experience
540 reviews
Joseph
33 years of experience
Chevrolet Suburban 1500 V8-5.3L - Suspension Air Bag Replacement (Driver Side Rear) - Dallas, Texas
Very professional and knows what he's doing. I highly recommend him.

Excellent Rating

(15,227)

Rating Summary
14,268
476
111
84
288
14,268
476
111
84
288
Number of Chevrolet services completed
167497+
services done by our mechanics
TOTAL NUMBER OF EXPERT Chevrolet MECHANICS
1600+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Hyundai Santa Fe
Over Over the years, the Hyundai Santa Fe has really started to come into its own as an SUV. The vehicles have always been affordable, and the same holds true with the 2012 model. Key Features The vehicle offers bucket...
How Long Does a Power Steering Pump Pulley Last?
In In a hydraulic power steering system, which is what the vast majority of cars on the road today use, fluid must be pumped through a series of lines and hoses to the steering rack. That is done by the...
Pennsylvania Parking Laws: Understanding the Basics
Knowing Knowing the parking laws and regulations in the state of Pennsylvania is just as important as knowing all of the other rules of the road. If you were to park in an illegal area, you could face fines and...

What is proper reading on wires inside distributor?

11.88 is low for an automotive battery. A reading within .2 volts of the battery can be expected. It may just be running out of juice from cranking and will need to be charged fully before it is put to...

Oil leaked heavily out of my car while driving home while making a revved up noise.

Hi there. Check the engine for any oil leaks that are visible to you. Check the front seal, the oil pan, the oil filter, the oil drain plug (make sure its tight), the valve cover gaskets, the oil cooler lines,...

FNR5 Transmission skipping 2nd and 3rd gears.

It is very possible that there could be pieces of RTV in the valve body causing a restriction. It is also possible that the transmission itself could have some internal damage causing this issue. I would recommend having the vehicle...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com