05 LS Overheating - Maintenance and Repair Forum

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05 LS Overheating
Thursday, February 16, 2017 1:23 PM
--- 2005 LS w/ 2.2-EcoTech

so, my 05-LS is overheating, only does it when idling or driving at low speeds....
I literally JUST replaced the thermostat (plus drain & refill) like 3 hours ago & still having the issue.

When driving on the highway, it stays below 180 degrees and never overheats AT ALL... not even a little bit.
But, when I'm peddling around town & staying under 40, plus stop-n-go traffic, it starts over heating.

The fan engages with the A/C, but, doesn't seem to without it.
It will reach 2 lines over the 195 (center) mark, after idling for about 10-15 minutes, but if slow cruising through town, it does it much quicker.
And, when its warm out, like today (73 degrees) this happens really quick, versus when its cold out, it hardly does it at all...

anyone have any ideas, or experience with this?

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DexCool coolant level is full, no sediment, isn't burning, or anything else...
Oil levels too are fine and not burning either.
Trans fluid is clean & full as well.

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