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2002 Pontiac Bonneville SE 4dr Sedan

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


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