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 10:19 AM
1999 GMC C1500 Synthetic oil
1999 GMC C1500
PRINCE62
- MEMBER
- 1 POST
- FOLLOW
Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
Advertisement