1997 GMC Yukon service engine light blinking

Tiny
KRISHUTCHINS
  • MEMBER
  • 1997 GMC YUKON
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 168,000 MILES
My service engine light is on and it starts blinking when I reach about 40mph. What does that mean?
Thursday, June 5th, 2014 AT 7:37 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The check engine light indicates that the car's computer has identified a problem. Since it is flashing, chances are you have a misfire. What I need you to do is take the vehicle to a nationally recognized parts store and ask them to scan the computer for trouble codes. Once I get that information, I can guide you as to what should be done next.

Most of the parts stores will scan it for free unless you live in California. They passed a law that prohibits them from doing it.

Let me know what you find. Also, the symptoms you notice when driving.

Joe
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Thursday, June 5th, 2014 AT 7:49 PM

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