Thanks for the info. Looking to see if it will bolt on without much if any modification to my truck. I have dual alternator as well so I wonder if there will be space.Sure sounds like time to switch thermostat brand. Motorad has been a trusted name for a long time (I hope that hasn't changed) - Motorad 423195 should be the correct one for you. Also 7332195 is their fail-safe design, but in the case of the 6.td even failing open may not be enough to save your engine, so next up, please consider...
Since your application is a heavier-than-normal vehicle: https://www.thedieselpage.com/features/dualstats.htm - though it'll cost you. It just might save you the expense of total engine replacement, though. You probably already know about this upgrade, but if you haven't read this particular article, please do. Heavy trucks like ambulances are specifically mentioned as to why this upgrade was engineered by GM.
Richard
These 2
96-02 GMC Chevy 6.5L Turbo Diesel - Dual Thermostat Housing Crossover 12553405 | eBay
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And
1996 - 2002 GMC CHEVROLET 6.5L TURBO DIESEL DUAL THERMOSTAT HOUSING P/N 12553405 | eBay
Find many great new & used options and get the best deals for 1996 - 2002 GMC CHEVROLET 6.5L TURBO DIESEL DUAL THERMOSTAT HOUSING P/N 12553405 at the best online prices at eBay! Free shipping for many products!
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Look like they will bolt right in. Does that sound right?
And I'm already seeing coolant seepage out of the new gasket, from the high flow WP I guess.That would explain it according to that article .
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