coolant over flows out overflow tube

2000 GMC SIERRA
217,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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TREYNOLDS32
  • MEMBER
  • 1 POST
I am loosing coolant through overflow tube, what can cause that issue?
Jul 20, 2014 at 3:03 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
have coolantsystem pressure checked for internal leaks like a headgasket
Jul 20, 2014 at 3:53 AM
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