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Low Coolant sensor location

Posted: Fri Sep 19, 2025 1:09 pm
by santacarl
Hey All,

2001 SSei. Need a new radiator. There are 2 options 1 has low coolant attachment/sensor the other does not have the attachment/sensor.

Is that an option on the SSei or is that standard equipment on the SSei? Where can is the low coolant sensor located...so that I can verify if I have it or not?

Re: Low Coolant sensor location

Posted: Fri Sep 19, 2025 9:42 pm
by harofreak00
No low coolant sensor on any 2000-2005 Bonneville...except the GXP with the 4.6 (sensor is in the overflow reservoir)

Some of the aftermarket radiators will have a hole for a sensor so make sure it comes with a plug for that hole.

Re: Low Coolant sensor location

Posted: Fri Sep 19, 2025 10:43 pm
by santacarl
harofreak00 wrote:No low coolant sensor on any 2000-2005 Bonneville...except the GXP with the 4.6 (sensor is in the overflow reservoir)

Some of the aftermarket radiators will have a hole for a sensor so make sure it comes with a plug for that hole.
Thanks for the response Haro....that explains why I didn't see one! Haha.