Engine overheats at high speeds

2015 CHEVROLET TAHOE
85,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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HASSAN1110
  • MEMBER
  • 1 POST
The engine temperature is normal at the low speed but the engine overheated on higher speeds. No error at the system and no coolant leak.
Aug 5, 2018 at 9:03 AM
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ASEMASTER6371
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 52,796 POSTS
Good afternoon.

I assume you mean it is overheating?

Two things come to mind.

1. Thermostat. It may not be totally open.

2. Radiator clogged with debris not allowing circulation at higher rpm.

Roy

https://www.2carpros.com/articles/engine-overheating-or-running-hot
Aug 5, 2018 at 2:25 PM
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