2005 Chevy Trailblazer was running hot replaced thermostat drove around for awhile was fine it was on 210 came back later on drove it it went to 260 when I start it the gauge is on 260 turn off it’s still on 260
Cars & Trucks - Chevrolet - TrailBlazer - 2005 Chevrolet TrailBlazer
Answers & Comments
Check REAL temperature with a scanner. Likely it's your temperature sensor, which in your case, is located right above the thermostat. You're lucky, it changed locations in 2006 PIA, but 05 is easy.
Sounds like the sending unit.
That is where the wire plugs in for the temp gauge, on or near the thermostat housing.