Break-in procedure - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-23-2005, 02:58 PM   #11
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Originally Posted by RemingtonDave
Anybody know just how fast the GXP will go in 3rd gear?
I had my foot in it and when I rolled off the throttle at 125 she shifted into 4th.
Just wondering.


im gonna say 128
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Old 12-19-2005, 10:45 PM   #12
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Default GXP Top Speed

I have personally seen 137MPH and run out of road prior to throttle (2005 GXP)
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