Radiator petcock location for '04 GXP - 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 10-11-2013, 10:31 AM   #11
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I can't tell which side, but from the looks of it, its on the drivers side, BOTTOM. Item #10.

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Old 10-11-2013, 02:19 PM   #12
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Well, after continued searching I finally found the drain plug. It'* on the driver side at the bottom of the radiator. You need to remove the complete splash pan and then remove the plastic brace that goes from side to side just above the lower bumper valance. I removed the 2 plastic push pins connecting the brace on the driver side. It'* pliable so just move it out of the way. You will need a 19mm closed end wrench to open the drain plug. I completely removed it and put a funnel up to the drain w/ a hose on it to keep the mess to a minimum.
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Old 10-11-2013, 06:01 PM   #13
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I knew there had to be one somewhere. Good job Bill.
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Old 11-11-2013, 10:16 PM   #14
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So that'* where that rascal sits. Nice find Bill!. I've been scratching my head for years. When it came time to change the Dex out I had a friend with a machine change it out.
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