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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > The 02-09 "How-To" and DIY Section

The 02-09 "How-To" and DIY Section Threads on Do-It-Yourself and How-To goes here.

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  #11  
Old 08-08-2018, 10:08 PM
rlabarge rlabarge is offline
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2003 GMC Envoy SLE XL
Steel Gray Metallic 4.2L I6 4X4
Join Date: Sep 2013
Location: Oxford, PA
Posts: 3
Oops, meant to say 15 years from the date it was put into service.
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  #12  
Old 08-11-2018, 03:17 PM
MWSchaefer77 MWSchaefer77 is offline
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2003 Chevy TrailBlazer LTZ
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Feb 2018
Location: sanford, ME
Posts: 37
Yeah, tried the dealer. It was a hard no with an attitude. The weird thing is, it doesn't seem to leak when sitting still at idle so, idk. The fuel pump relay got very hot to touch
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  #13  
Old 08-12-2018, 09:43 AM
fixer34 fixer34 is offline
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2002 Chevy TrailBlazer LTZ
Olympic White 4.2L I6 4X4
Join Date: Jul 2012
Location: Chicago suburbs, IL
Posts: 9
pull the tank...

Not quite as easy as some have stated, but still not a bad job. Need to get the back end up about a foot higher than the car usually sits. Also have to disconnect the fuel inlet hose to the tank.

I tried the 'cut an access hole' on my 2001 Blazer (not a TB, but similar arrangement) to replace the pump that way. The problem comes in trying to remove the fuel pump locking ring. Most likely it will be rusted in place and you may have cut/bend/break the old one to get it off, so buy a new ring when you get the pump. You will need working room to do this.
*my new fuel pump did NOT come with new nylon locks for the hose connector. Buy some of those also.*
Then you will want to clean up the area around the mount ring and lastly the new locking ring takes some force to get it in place.
All of this is a lot easier with the tank on the ground....

Probably a good time to replace the fuel filter also, and remember to reconnect ALL the fuel lines. (ask me how I know...)
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  #14  
Old 08-22-2018, 08:11 PM
sw904 sw904 is offline
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2006 Chevy TrailBlazer LT
Summit White 4.2L I6 4X4
Join Date: Oct 2011
Location: US
Posts: 6
Dropping the tank

I replaced the fuel sender on my '06 4.2L which requires pulling everything out. From the time I touched my tools until hitting the shower was 5.5 hrs with 1/2 hr lunch break. I did the job out in the driveway and nothing was left outside. Note: without the special tool it takes 4 hands to get the pump out! Fortunately, for me, my friend drove up at the right time! Be patient, take your time. Replace anything that looks suspicious unless you enjoy pulling tanks. Definitely run the tank down first. Gasoline weighs 6 pounds per gallon!
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