Where is the coolant sensor located on a bonneville gxp v8 2005

Hope the orientation is good enough? Two wire connector. Wire colors orange and black. On different engines, I look at it, then decide if easier to get at it from the top or the bottom. It appears to be on driver side, If I'm reading that correctly?

Why ? Does the blower work on high ? but no other speeds ! If it doesn't come on at any speed it's not the resistor . Does the vehicle have automatic climate control or manual ? Automatic doesn't have resistor , has a blower motor control processor . HVAC Blower Motor Circuit You need to test , not guess !

Make sure the radiator is full of coolant. When the engine is cold from sitting several hours open the radiator cap (if you can). It should be 100% full. If not it has a leaks somewhere.

coolant sensor just Under the thermostat 2 wire one yellow and the other black
hope it help

Look at the modulator on the side of the transmission. It's probably gone bad.

Pretty typical for our generation of Bonneville (mine's a 2005 GXP). There are at least two different fans for our generation of Bonneville.
Remove the panel under the passenger side dash; I recall two small screws.
There may be a couple wires to unplug from this panel.
The blower motor is located right above the passenger toes.
Unplug the three wire plug.
Remove a small rubber hose. It has one right angle bend. It's about the size and length of a big thumb.
Remove 3 small screws on the fan, and the fan comes out. Here's my new one: The Hole under the passenger dash. Insert blower here:

I have a 2005 Bonny GXP and have replaced the blower motor.
It is located under the dash, passenger side, just above the passenger toes.
It's easy to replace, and the cost of the blower has come down a lot!
I did a write-up with pictures at: http://www.gmforum.com/showthread.php?t=277509
You may have to register (for free).

Basically, remove the kick panel under the dash. Unplug the blower. Remove the vent hose. remove the three screws holding the fan, and it will drop out.

I have a 2005 Bonneville GXP. I would expect yours to be the same as mine.
My battery is located under the rear seat.
Pull the fron of the seat straight up. There are two clips holding it.
Underneath you'll see the battery and a fuse block.
The cable and holddown clamp is pretty obvious.
Make sure you get the right size battery.
Also loosen the ground strap and inspect for corrosion and retighten.

Hi, check.........I need to know which fuse runs the cooling... on this forum thread. Its not a fuse if the fan turns but could be fan relay. Unplug the coolant temp sensor lovated just below the thermostat houing and see if the fans come on. If they do, it might be the coolant sensor that is bad.

Did it stay there? If so, put a pressure gauge on the engine, to check the actual pressure and then you will be able to tell if it is just the sending unit/pressure sw , that is off.