2002 GMC C2500 eng.light

2002 GMC C2500
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K HAMMERLE
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  • 1 POST
Electrical problem
2002 GMC C2500 V8 Four Wheel Drive Automatic

Why does the service eng light come on at 45-65 mph.Goes out when off hyway ?
Feb 21, 2010 at 1:48 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
you need to have the code scanned to see what is causing the problem. most auto parts stores will do this for free....
Feb 27, 2010 at 7:27 AM
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