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The waterpump on the 4200 Trailblazer is located on the front of the engine. This would be the first smaller sized pulley just above the crankshaft pulley. Good luck
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4 bolts hold the shroud on. 2 on bottom,2 on top. Leave on in on the top until you remove the clutch fan. Clutch fans are a pain to get off with out the right tools. Once off, remove the bolt from the shroud and pull them out together. Remove the serpentine belt. Remove the pump.
the sending unit inside the tank is bad if you have high miles you might want to change the fuel pump while your dropping the fuel tank out to do the sending unit as it is connected to the pump anyway
On 05+ Trail Blazer, the fuel filter is integral with the fuel pump inside
of the fuel tank. It is a non-serviceable part. On 02-04s, the filter is
on the drivers side frame rail at about the B-pillar. If your trail Blazer is a late 04 which means that it was build close to the 05 Trail Blazer, you may have a non serviceable fuel filter. Good luck and check under your Trail Blazer or look at your manufactured date sticker on the door which would help you indicate if your 04 is a early Trail Blazer and you'll have the fuel filter on the inside frame rail under the driver's door.
First you need to drain down the coolant, secound take top of fan shrould off 2#10 bolts on each side, third loosen fan bolts, fourth take belt off, fifth take fan off, sixth unbolt anything that is bolted to water pump like power steering pump, maybe ac. pump heater hoses ect. last take 4 bolts out that hold water pump to block 2 on each side and thats it. Clean old gasgets off engine block and bolt on new pump with new gasgets witch will come with new pump. Put back to gether in reverse order.
Click on x to openupper right corner with about 5 bolts
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