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2003 Chevy Trailblazer Service Engine Light On. Fan Not Bl

Tiny
JERR1
  • MEMBER
  • 2003 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 61,000 MILES
Recently, I noticed the Service Engine Light would come on and a day later it would go out. Everything back to normal ¦most recently it came on again and this time I noticed the heating gauge escalated to 260 degrees which is telling me the car is about to overheat. Quickly I turn on the heating to control the gauge until I was able to get home. When cutting the car off I can hear the coolant boiling. I also noticed that fan was not on. What would be the problem?
A. Thermostat
B. Sensor to the fan or fan is out of order
C. Lack of Coolant
D. Fuse
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Wednesday, July 28th, 2010 AT 8:18 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi jerr1, Welcome to 2carpros and Ty for the donation.

Lets try replacing the thermostat and direct power to the fan motor if it comes on test the fan relay and the coolant temperature sensor
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Wednesday, July 28th, 2010 AT 8:32 AM

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