If you are planning on doing your own work, this manual is well worth the $20.00
How to Change water pump on a 2002 Trailblazer?
to change the water pump you need to loosen the main bet by losing the tensioner, then you need to take the bolt around the pump and remember most pump don't come with pulley you have to exchange them. i recommend you going to pepurcar.com and ask a master tech for advise and help they will give you a step by step instruction and its also free
How to Change water pump on a 2002 Trailblazer?
i'm afraid it's not that easy. i'd recommend a chevy dealer do it for you. then the part will get a 1 year warranty if you use AC Delco from the dealership. can't get that kind of warranty with autozone in your driveway.
heres a step by step
http://www.autozone.com/az/cds/en_us/090鈥?/a>
looks easy ,good luck
Take the fan off, lower radiator hose, all bolts off, remove it, clean gasket surface and re-install.
about 100$ labor part prices vary
