My 05 GXP just turned over 70k..I replaced the plugs and 4 coil packs along with a new intake manifold gasket. It really runs super now..and everything is working fine. Next year I plan on taking it on a 2500 mile trip across country. It truly is a fantastic road car. Brakes were done alittle over a year and a half ago along with new Hankook tires. Really looking forward to this road trip!

I Love my 2005 GXP, miles close to 60k. I too have replaced or fixed just about all the same things as you have and it runs like a scalded dog, excuse my term.. Also White Tri color any troubles with a/c climate temperature control assembly??

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Car Crazy Family~Cancer Warrior! Veterinary Technician and Realtor.
Garage Whore's:
1969 Chevy Nova,
1996 Chevrolet Impala SS 1 owner~ME..
Daily Drivers:
1994 Impala SS,
2012 Silverado Crew Cab V-8,
2003 Cadillac Deville,
2005 Pontiac Bonneville GXP, FOR SALE!
2006 Ford F-150 Crew Cab,
2004 Ford F-150 Extended Cab.

None. It's been working just fine in fact ittl freeze you out! Knock on wood..I haven't had any electrical issues.