Between the intake manifold and the engine block; Dude, if you didn't already know that much about your car you shouldn't try to replace it by yourself. Get help.
If it was removed then YES.
Where is the rear washer fluid reservoir located on a 1991 Pontiac Transport
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Unbolt exhaust mainfold from cylinder head. Remove damaged gasket, clean surfaces well, but w/o scratching them. Put new gasket in place, and put exhaust manifold back. Torque bolts to spec - done.
In a 1991 Pontiac 6000 LE, the knock sensor is typically located on the engine block, often near the intake manifold or cylinder head. It may be positioned on the driver's side of the engine, mounted to the block. For precise identification, it's best to consult the vehicle’s service manual or a repair guide specific to that model.
8Where is voltage regulator located
its on the cylinder head. just like any exhaust manifold.
On a 1991 Pontiac 6000, the coil pack is typically located on the engine, mounted near the ignition module. It is usually situated towards the rear of the engine compartment, near the intake manifold. To access it, you may need to remove some components or covers, depending on the specific engine configuration. Always refer to a repair manual for detailed instructions specific to your vehicle.
they are located right at the exhaust manifold
on the valve cover
The fuel pump is located inside the gas tank.
I believe you want to drain the coolant, remove the top hose at the thermostat housing, remove the housing, replace the stat and gasket, reassemble fill with coolant and bleed the system.