I had the exact same issue occur last week (Temp spike, temp @ 150 when off). The coolant reservoir was full, so I figured my thermostat was stuck shut. I replaced it (losing a good amount of coolant) & noticed that the "low engine coolant" light on the DIC kept coming on. Eventually (with enough ...

Thanks Carl.

I'm on the complete opposite end of the state (45 minutes from Cincinnati).

I'm workign on some pic. Will update soon.

Hi everyone!

I've been viewing the site for the past few months (picking up some good info) & figured it's about time I joined.

I bought my 2005 Bonneville GXP about a year ago & ABSOLUTELY LOVE IT!! (I always liked the big Pontiacs - my dad had a '62 Bonneville convertible & I had a '72 Catalina ...