1999 Chevrolet Monte Carlo Engine cooling Problems
- Complaints
- 31about this part
- Share
- 25%of 125 total for the year
- Median mileage
- 77,800miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 31 complaints about the engine cooling of the 1999 Chevrolet Monte Carlo, 25% of the 125 complaints for this model year. Where a mileage was given, the median is 77,800 miles. 1 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.
“Intake manifold coolant leak, happened to my 3.1 engine, and to several of my friends, each with the 3.1 engine. Each stated a cost of $ 650.00 for this repair, seems this happens to all the 3.1 liter engines, shouldn't Chevrolet own up to this problem? When it happens to a select few thats one thing, when it happens to all of then is it not a design flaw?”
NHTSA complaint #10068207, filed 2004-05, 85,000 miles“My 1999 Monte Carlo stated leaking antifreeze dips at a time. Then the next thing I know there was puddles of anti-freeze under my car. I took the car to a shop and the mechanic said I needed a intake manifold gasket and that's going to be $450.00. I didn't have the money so I had the car pushed home and now I am waiting to get the car fixed when I can come up with the money.”
NHTSA complaint #10104355, filed 2004-12, 91,000 miles“I was at a friends for several hours proceeding incident. I drove my 1999 chevy Monte Carlo z34 about 1 mile from my friends to taco bell. The car had been running great. I went inside to order I was in their 10-15 minutes. When I came out smoke was coming from under the hood. I opened the hood and the top of the engine was on fire. Taco bell employees called 911 and then provided a fire extinguisher. The fire was put out by the extinguisher and they cancelled the 911 call. I called a tow company and had the car towed home due to the hour and my engine being melted.”
NHTSA complaint #10243150, filed 2008-09, 189,457 miles“Vehicle has a 3.1l v6 engine that was leaking coolant as a result of a cracked intake manifold gasket. I was told by my mechanic that they are replacing this gasket on at least one vehicle a week. And they are just a small shop. The first problem I noticed with this vehicle was a slow leak in the cooling system. This occurred in the summer of 2002. Later in the year, I noticed coolant on the garage floor and thought perhaps the radiator was leaking. When I took the car in to be repaired on december 16, 2002, it had 51,223 miles on it. …”
NHTSA complaint #10069949, filed 2004-01, 51,223 miles“We were preparing to take a long trip and took our 1999 Monte Carlo into our mechanic for a pre-trip once-over. He just called and informed us that the radiator was almost empty and that there is a leak in the intake manifold gasket, it can (and will) be fixed for a cost of $750.00. Our mechanic has a small shop and he has fixed the same problem at least once a month on GM products with a 3.1 liter engine, he just had a buick last week with the identical problem. Doesn't anybody else see this as an issue that GM needs to take some kind of action about?? …”
NHTSA complaint #10116111, filed 2005-03, 44,554 milesRelated recalls
- 15V701000Oct 26, 2015General Motors LLC (GM) is recalling certain model year 1998-1999 Chevrolet Lumina and Oldsmobile Intrigue, 1997-2004 Buick Regal and Pontiac Grand Prix…Covers: Chevrolet Monte Carlo 1998–2004, Pontiac Grand Prix 1997–2004, Buick Regal 1997–2004 +3 more
- 09V116000Apr 8, 2009General motors is recalling 1,497,516 my 1997-2003 buick regal, my 1998-2003 chevrolet lumina, monte carlo and impala, my 1998-1999 oldsmobile intrigue, my…Covers: Chevrolet Monte Carlo 1998–2003, Pontiac Grand Prix 1997–2003, Buick Regal 1997–2003 +3 more
Related service bulletins
- 10246631Sep 1, 2013Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
- 10012148Jun 1, 2004New rear main seal and special tool for installation.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2006 | 6 | 5% |
| 2005 | 3 | 3% |
| 2004 | 7 | 3% |
| 2003 | 25 | 16% |
| 2002 | 30 | 13% |
| 2001 | 48 | 17% |
| 2000 | 42 | 18% |
| 1999 | 31 | 25% |
| 1998 | 14 | 14% |
| 1997 | 30 | 18% |
| 1996 | 39 | 25% |
| 1995 | 19 | 11% |
| 1987 | 2 | 40% |
| 1986 | 1 | 17% |
Other parts of the 1999 Chevrolet Monte Carlo
49 complaintsElectrical system
10 complaintsEngine
9 complaintsTransmission and drivetrain
7 complaintsVisibility (wipers, defrost, mirrors)
6 complaintsExterior lighting
5 complaintsSteering
5 complaintsFuel system
4 complaintsBody and structure
4 complaintsAir bags
3 complaintsEquipment
3 complaintsOther or unknown
3 complaints
← All problems reported for the 1999 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