Need Help?

2002 Pontiac Bonneville SE 4dr Sedan

2002 Pontiac Bonneville
Trim Info:
Front Wheel Drive, 4 Door Sedan, Large
20 mpg city / 29 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

October 22, 2012, 4:35 pm

Jody W

Question: Why could it be overheating?

Bonneville with Northstar V8. 102,000 miles on it. Temp gauge maxed out last night. Did Onstar diagnostic on it last night. They said it was ok. Got about a mile from my house this evening and temp gauge starting climbing. Turned around to come back home and it went all the way to max before I got back home. Checked reservoir tank before I left and it was full.

October 23, 2012, 10:54 pm

Richard W
Expert Mechanic

You need to see if the fans are coming on. I think they are not coming on. Warm the car up and see if they come on. Also turn on the A/C they should come on with it. If you have no fans check the relays. Also check for 12 volts at the fans. If they have 12 volts replace the fan motors.

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…