2003 Suburban check engine light

2003 CHEVROLET SUBURBAN
132,000 MILES • V8 • 4WD • AUTOMATIC
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DUBBER75M
  • MEMBER
  • 1 POST
when truck gets to a cruising speed of about 70 engine light flashes. it sometimes even goes into the reduce power mode which requires you to stop and then it runs fine again. it always runs good as if nothing is wrong.
Jan 19, 2011 at 5:24 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check engine light on
Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.
Jan 19, 2011 at 5:28 PM
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