Need Help?

2005 Cadillac STS Base 4dr Sedan V6

2005 Cadillac STS
Trim Info:
Rear Wheel Drive, 4 Door Sedan, Mid-Size
17 mpg city / 24 mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
Enter current mileage for most
accurate info about this vehicle

Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.
back to question list

Ask the Community

Ask Our Auto Mechanics

January 17, 2013, 1:36 pm

Joshua W

Question: what causes my car to idle rough when i turn my a/c on?

my car has a rough idle whenever it is sitting with the a/c. it happens as soon as the a/c is turned on.

January 22, 2013, 8:09 pm

Richard W
Expert Mechanic

You need a tune up. That is where I would start first.

0/0 users found this helpful.

January 24, 2013, 9:11 am

Joshua W

I changed my spark plugs but the problem is still there, I found a leak in my radiator hose. Could it be causing some kind of stress on my fan since its always lower in fluid than it needs to be??

0/0 users found this helpful.

January 24, 2013, 11:04 pm

Richard W
Expert Mechanic

No its putting stress on the engine. It could over heat and then you are look at big money to fix.

0/0 users found this helpful.

January 25, 2013, 5:16 am

Joshua W

ok what should i try next since i replaced the spark plug??

0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to

My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…