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see attached link. the thermostat housing is under a throttle body housing. the rear bolt will be hard to get at, not impossible, without removing it. The thread recommended linking 2, 13mm box end wrenches to get enough torque.
Don't forget to bleed it when you are done. Follow the radiator hose to the engine block above the water pump. Should see a housing with a brass bolt. Bring car up to temp and slowly loosen bolt until coolant starts to come out then tighten. DO NOT OVERTORQUE - the head of the brass bolt will snap off. I think there is a 2nd bleed point but can't remember

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14y ago
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Q: How do you change thermostat in 95 Chevy Lumina?
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