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Re: 99 3.1 V6 coolant loss overflow tube
Goto NAPA and get a hydrocarbon sniffer for your coolant. Still sounds like heads or gaskets to me. Only way to introduce large amounts of pressure into the coolant before it overheats. You said it dumped a bunch right out of your driveway. A sniffer will tell you, you shouldn't have any hydrocarbons in your coolant. If you do You know what the deal is.
Heads, gaskets, or heaven forbid a block....
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10 hours away from John Deere master certified
also master certified ASE tech. Exp. in both.
Went to school for cars, wound up staying with Deere dealer for a while, so schooling there too. Also couple years exp in GM and some GM training
Gave up wrenching for "Greener Pastures"
Current job: RN
2010 Silverado Z71 5.3L 65xxx
Wife's
2007 Suburban 1500 LTZ 5.3L 102xxx
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