Skip to content
Engine coolingPart report

2003 Chevrolet Monte Carlo Engine cooling Problems

Complaints
25about this part
Share
16%of 158 total for the year
Median mileage
75,000miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 25 complaints about the engine cooling of the 2003 Chevrolet Monte Carlo, 16% of the 158 complaints for this model year. Where a mileage was given, the median is 75,000 miles. 7 a fire, according to the filers. 2 recall campaigns on record are filed under a similar system.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I had to replace my cat converter at approx. 65,000 miles, have intermittent headlight failure when switching from high to low beams, certain lights on the stereo and climate controls have gone out, and security/key lock cylinder issues, where the car won't start for an hour or so. Car now has 86,000miles, issues still exist. This is the jeff gordon edition”

NHTSA complaint #10265486, filed 2009-04, 65,000 miles

“I have an 2003 Monte Carlo ss 3.8 . I have had loss of power . It wont go past 4 grand on the tac. I have replaced the plugs and plug wires, coils, fuel filter, idle sensor, tps sensor, EGR, I have had the fuel pump pressure check it is 55 PSI. I think it may be the catalytic converter. I noticed they were recalled on the 01 & 02 models why not the 03 models?”

NHTSA complaint #10248552, filed 2008-11, 95,000 miles

“I had to turn on the a.c. So the car would not overheat --took it in and they had to replace my intake gasked was told this is commen with chevy--3 months later my air compresser is shot already have paid $3,000 and the car only has 50,000 miles.”

NHTSA complaint #10228641, filed 2008-05, 50,000 miles

“I purchased a 2003 chevy Monte Carlo in april 2011 from a used car dealer pmm auto sales whom I trusted and dealt with for years, with less than 115,000 miles and within less then 30 days there was signs of minor problems. When I attempted to have the vehicle checked by the car dealership. I was pushed to the side mainly bc im a female. I did notice a white film when I check the low oil pressure light but I didn't think anything of it bc of my lack of knowledge. Come to find out the intake valve gasket was gone and needed to be replaced. The warranty co. …”

NHTSA complaint #10415204, filed 2011-07, 116,500 miles

“I have a 2003 Chevrolet Monte Carlo. Beginning in august of 2006, my check engine light came on one day so I took the car to the dealer to have it checked. The diagnosis was an exhaust rocker stud had pulled out of the cylinder head. They heli coiled it ,and it was fine for a while. Then in sept. 2006, the same thing happened again,this time the opposite cylinder head. This time they fixed 3 of the studs. Now march 2007,the first cylinder head has the same problem. The dealer was unable to repair the head so it was replaced. …”

NHTSA complaint #10185116, filed 2007-03, 62,592 miles

Related recalls

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
200665%
200533%
200473%
20032516%
20023013%
20014817%
20004218%
19993125%
19981414%
19973018%
19963925%
19951911%
1987240%
1986117%

Other parts of the 2003 Chevrolet Monte Carlo

Electrical system
49 complaintsEngine
32 complaintsBrakes
24 complaintsAir bags
11 complaintsTransmission and drivetrain
11 complaintsOther or unknown
8 complaintsExterior lighting
7 complaintsFuel system
5 complaintsVisibility (wipers, defrost, mirrors)
5 complaintsSuspension
4 complaintsVehicle speed control
4 complaintsSteering
3 complaints

← All problems reported for the 2003 Chevrolet Monte Carlo

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology