Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

Print this page

8.0

pretty bad
Typical Repair Cost:
$500.00
Average Mileage:
88,141 miles
Total Complaints:
3 complaints

Most Common Solutions:

  1. replace valve cover gaskets (2 reports)
  2. not sure (1 reports)
2003 Chevrolet Monte Carlo engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2003 Chevrolet Monte Carlo:

Unsubscribe any time. We don't sell/share your email.

2003 Chevrolet Monte Carlo Owner Comments

problem #3

Jun 072014

Monte Carlo SS V6

  • Automatic transmission
  • 100,000 miles

A D V E R T I S E M E N T S

click to see larger images

valve cover gaskets on both banks were seeping valve cover gaskets on both banks were seeping valve cover gaskets on both banks were seeping valve cover gaskets on both banks were seeping valve cover gaskets on both banks were seeping valve cover gaskets on both banks were seeping

I'm not sure how long this problem had been going on. My car's heater coil drained into the floorboard of my car causing alarm. It was only when I went to have the heater coil replaced that I learned the condition of my cooling system. I have learned that this has been a SERIOUS problem with GM vehicles. I was never notified, but learned today that there has been a class action lawsuit that was filed and settled and I was never notified. These conditions should be notified by GM so that it does not cause a breakdown.

- , Florence, KY, USA

problem #2

Nov 272011

Monte Carlo LS 3.4L V6

  • Automatic transmission
  • 66,200 miles

I purchased a beautiful 2003 Chevy Monte Carlo back in 2005. It was a certified used vehicle with 21,000 miles. Paid 1500 for extended warranty. Around 30,000 miles i had the lower intake manifold gasket replaced. At 53,546 i had lower intake manifold gasket replaced again. Now at 66,200 LIM gasket needs replacing again. The first two repairs were covered by warranty. The cost of repair is $1200-1500, which is now not under warranty. Of course the cost is a factor but more important is the frequency of the problem. It's apparent there's a defect in this area of the 3.4L V6. I am 57 yrs old and love American cars.GM and the rest the American car makers own up to your mistakes or suffer the consequences. Need a Bail Out?

- , East Palo Alto, CA, USA

problem #1

Nov 182010

Monte Carlo

  • Automatic transmission
  • 98,222 miles

From what I have heard and researched online this is fairly common around 60,000 miles. I'm pretty particular when it comes to my vehicles so I guess it held up pretty well. Still a nice chuck of change to fix though.

- , Orlando, FL, USA

Not what you are looking for?