Born2bwild
New member
- Jan 13, 2026
- 2
- 0
2020 GMC Elevation 62,000 miles.
I have a problem with the engine cooling fans running on high speed on a cold strat-up. I imagine one of the engine temperature sensors has failed. I disconnected the positive battery terminal for about 30 minutes & then reconnected it. The truck started up without the cooling fans running on high speed. That lasted for about 6 start-ups totaling about 100 miles. I started up again this morning it was 10°F outside & the cooling fans are back to running on high speed at start-up. Any ideas why & what I should do to solve this? Where can I get a good repair manual?
I have a problem with the engine cooling fans running on high speed on a cold strat-up. I imagine one of the engine temperature sensors has failed. I disconnected the positive battery terminal for about 30 minutes & then reconnected it. The truck started up without the cooling fans running on high speed. That lasted for about 6 start-ups totaling about 100 miles. I started up again this morning it was 10°F outside & the cooling fans are back to running on high speed at start-up. Any ideas why & what I should do to solve this? Where can I get a good repair manual?