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    Need Help. 2011 Tahoe cooling system will not pressurize.

    Ok, you said" top radiator hose has pressure, hard, but bottom hose does not" . Do you understand how the radiator and inlet and outlet hoses function. There is no way to retain pressure in upper hose and not also the same pressure in lower hose. Using your hands isn't accurate. Get pressure...
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    Okay, new problem, the engine is overheating

    The problem it appears there are multiple condition issues. That don't seem connected. No heat in heater outlet. Hvac control head, blending doors, no or reduced flow through heater core. ( did you pull hose off heatcore return, good coolant flow?) Without being there my first easy idea is cap...
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    Okay, new problem, the engine is overheating

    If in park, idling with rpm increase a slight drop in water level is not unusual. With the new parts, failure of these is odds are less likely but not unknown. You have no heat at heater outlet? Are heat core inlet and outlet hoses temp correct for indicated engine temp? Is thermostat working...
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    Tire pressure for bigger wheels

    Run what is printed on tire. "PXXX" is a passenger vehicle designed tire. What is listed is the everyday specification. In my K2500 with LT 275/16; " maximum inflation 55psi at 2700 lbs per tire" . I normally run 35 in all tires. If I'm going to run a heavy load, fill to higher psi. The higher...
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    Swap rear 3.08 gears for 3.42

    The one problem, important maybe. High perf' vehicle, option codes, does it have limited slip (positraction, locker) ? Your known is that it came eqipt with higher performance parts. Retaining your known parts and swapping out ring and pinion would be my move. Bigger risk obtaining an unkown...
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    Swap rear 3.08 gears for 3.42

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    A better radiator?

    When you say "OEM" , you saying ACDelco, or over the counter at the chevy dealer parts? Delphi was one of the original equiptment assembly suppliers.
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    Fuel tank leaking

    You have three fuel pumps on a 1999 Tahoe... . I need to look this up.
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    1998 Suburban C2500 Towing Performance

    First look at the drivers door jam for vehicle weights and limits, net and gross. Check the info printed in glove box. Do you have the "trailer , towing options"? Suburbans and Tahoes don't come with full floating axles ( maybe real old 60's). Can confirm your axle type by just looking at the...

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