1999 GMC C1500 Synthetic oil

1999 GMC C1500
123,000 MILES • V8 • 2WD • AUTOMATIC
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PRINCE62
  • MEMBER
  • 1 POST
I have a 1999 GMC Suburban 5.7 with 123,000 miles. Can i change to a synthetic oil. Would i need to flush the engine.
Feb 23, 2008 at 2:19 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
yes you can, no don't flush!
Feb 23, 2008 at 2:23 AM
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