A few weekends ago I had to replace the fan clutch on my '06 Trailblazer EXT LS. In addition to getting the P0495 code from the check engine light, when I rev'd it up it sounded like a jet engine. Instructions: http://www.diystew.com/2006-trailblazer/
see "how too replace water pump on 2002 Trailblazer"
replace water pump 2005 chevy trailblazer vortec 4200
how do you get a water pump off on a 2005 trailblaxer 4.2
Your water pump is probably going out on it.
The torque of a water pump bolt can be requested from the manufacturer. The Chevy Trailblazer has a high torque for the water pump bolt.
where can I find a diragrame that shows how to replace a water pump on a 2006 Chrysler town country tour van
www.trailvoy.com All the answers for your Trailblazer from true enthusiasts!
The 2006 did not have one.
Remove fuel tank for access
it is built in the fuel pump in gas tank
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Replace water pump and gasket