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hardly worth mentioning
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
53,630 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 Chevrolet Impala cooling system problems

cooling system problem

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2003 Chevrolet Impala Owner Comments

problem #9

May 062010

Impala 6-cyl

  • 111,439 miles


I took my 2003 Chevy Impala, V6 2.4 L, to a jiffylube for a standard oil change. There they informed me that I had a coolant leak, and they topped-off my antifreeze for only $4. since repairs aren't affordable at the moment, I continued to drive my Impala to school and work only. I was on my way to class early one afternoon, about a week after my oil change and my engine was over heating and engine coolant was completely gone. Luckily I was only 2 miles from my home and had a friend run some antifreeze and water to my break-down location. I put enough antifreeze and water into the radiator to get me home, where my car will sit until repaired. It is to my understanding that all 2003 V6 2.4 L Impala have this problem. If that is the case, why hasn't GM recalled this vehicle for proper repairs? an investigation into this matter would be greatly appreciated from a struggling american that lives in a region of the country where public transportation is obsolete and a motorized vehicle is a necessity.

- Swiftwater, PA, USA

problem #8

Nov 152009


  • 64,000 miles
Leaking head gasket causing engine cooling system problems.

- Philadelphia, PA, USA

problem #7

Jan 012009


  • 36,300 miles
My 2003 Chevy Impala had lost all the dex cool antifreeze and was overheating w/the engine light coming on. On further investigation, my mechanic says it is the intake manifold and is likely caused by the dex cool coolant as this has been an ongoing problem with that particular coolant clogging up and destroying the intake manifold. I checked out the website for dexcool and you had to be in on the claim by October 2008 to get any type of reimbursement. It is January 09 so I guess I am now stuck with the problem"???" I am requesting a total recall of all the vehicle made with dex cool as this is eating through and destroying the cheaply made parts of my car. A search on the internet amazingly brought up so many problems with these poorly made parts it is sickening. I am upset that I received nothing from my dealer regarding this problem or from GM for that matter. Recall this problem and make the automaker responsible. By the way, my car has only 36,000 miles on it. Take that for a car in need of a costly repair with that few of miles! thanks for your help in this matter as it is very frustrating as a consumer.

- Bascom, OH, USA

problem #6

Sep 142007


  • 150,000 miles


The contact owns a 2003 Chevrolet Impala. In August of 2007, while driving approximately 25 mph, the turn signals failed. Immediately following this incident, while driving approximately 35 mph, the vehicle overheated. The contact pulled to the side of the road, lifted the hood, and noticed smoke rising from the engine. She took the vehicle to a local repair shop and the mechanic informed her that the radiator was cracked and needed to be repaired. The repairs were made, but the vehicle overheated again months later. In August of 2008, body work was performed on the vehicle and afterwards the exterior lighting began to illuminate on and off automatically. She took the vehicle back to the body shop and was informed that the failure was due to a defective combination switch. The combination switch was replaced and the mechanic stated that the repair was unsuccessful; therefore, the original part was reinstalled. After the failed attempt to repair the failure, the mechanic performed a diagnostic test and stated that the failure was due to the combination switch. The manufacturer and dealer have not been notified. The current mileage was 171,920 and failure mileage was 150,000.

- Sacramento, CA, USA

problem #5

Mar 102006

Impala 6-cyl

  • Automatic transmission
  • 72,000 miles
I own Chevrolet Impala which is less than 3 years old. The coolant is supposed to last 100,000 miles or more. But the system has problems and it leaks. The car gets overheated and presents a fire hazard.

- Sugar Land, TX, USA

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problem #4

Oct 032005

Impala 4WD 6-cyl

  • Automatic transmission
  • miles
I own a 2003 Impala I was very pleased with my vehicle, even though I have had to have my rotors and brakes fixed twice still pleased overall. However, about a month ago I took my car in for a normal oil change after returning home, I noticed I didn't have any anti-freeze in my car. I called a spoke to a service tech he informed me that I probably had a leak somewhere. I brought it in he informed me there was a hair line crack in my gasket and I needed a new water pump. The cost to repair it would be over one thousand dollars. What I cannot understand why did my low coolant indicator light come on. Why did I have to discover this problem on my own? after reviewing other complaints I find I am not alone with having a coolant concern. I feel that this should be looked into more carefully. It is certainly a problem with the coolant system in the 2003 Impala and this failure should not be at the expense of the consumer.

- Detroit, MI, USA

problem #3

Feb 062004

Impala 6-cyl

  • Automatic transmission
  • 3,900 miles


Driving 2003 Impala in rain when engine died suddenly in the middle of street, causing traffic hazard. Starter refused to turn overeven though elctricsl system continued to function, dealer said water got into engine and Chevy was not responcible, engine would have to be rebuilt at owners expense.

- Islip, NY, USA

problem #2

Oct 272003

Impala 6-cyl

  • Automatic transmission
  • 2,000 miles
Strong smell of anti-freeze in the passenger area of 2003 Chevrolet Impala.

- Roanoke, VA, USA

problem #1

Jan 222003

Impala 6-cyl

  • Manual transmission
  • 43,030 miles
$688 to replace the upper engine plenum due to anti-freeze leak from engine.

- Amston, CT, USA

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