2002 GMC C2500


K Hammerle

February, 21, 2010 AT 9:48 AM

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?

1 Answer



February, 27, 2010 AT 3:27 PM

You need to have the code scanned to see what is causing the problem. Most auto parts stores will do this for free.

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