fuel filter change

Are any special tools needed to replace the fuel filter on a 04 TB? How are the fuel lines connected? Quick connectors? Any suggestions on fuel filters?
Thanks for your help.

I've heard that you have to drop the tank skid plate for clearance. No biggie from what I hear. Just normal clamps for the filter. My 2005 has the filter in the tank.:banghead:

Joel

Have you changed your filter on the '05 yet? I have same here and interested in knowing where and how easy it is to do so?

There's no fuel filter to change on the 2005+ TB's (as far as I know). It's inside the tank. Someone posted a pic of a typical cannister looking filter, but I don't see how that's possible for an in-tank filter. In-tankers are almost always a big sock on the pump suction. You can replace the sock on a pump changeout.

Joel

The filter on my '02 is located inside the frame rail on the drivers side. Small clamp with a very rusted screw hold it on. You can change it with a pair of needle nose. Be carefull with the plastic clips though.

I recently changed the fuel filter on my 04 and it was very easy. One screw and the two fuel line clips. It is mounted on a frame support just in front of the fuel tank. $22.00.

On my old car, when changing the fuel filter, I used to take out the fuel filter fuse, crank over the engine a few times to get all the fuel and pressure out of the lines and THEN disconnect the lines on the filter so I didn't get sprayed. Should I do the same thing on the Trailblazer? Thanks guys.

On my old car, when changing the fuel filter, I used to take out the fuel filter fuse, crank over the engine a few times to get all the fuel and pressure out of the lines and THEN disconnect the lines on the filter so I didn't get sprayed. Should I do the same thing on the Trailblazer? Thanks guys.
Pretty old thread here, but anyway there is a pressure bleed off valve next to the fuel filter.

What is the standing fuel pressure supposed to be on those? I know the '05 models have pressure controlled via in tank FMU and not a remote FPR, but the '04s are just the plain old, supply/regulator/return line system.

What is the standing fuel pressure supposed to be on those? I know the '05 models have pressure controlled via in tank FMU and not a remote FPR, but the '04s are just the plain old, supply/regulator/return line system.
I am driving a 2002 and don't know the fp specs, some mod huh!!?? I believe it is 55-60.

That's probably right. I've got one (2004) at 56-57 PSIG rock steady. It has the typical "no power in second gear" problem. Time for a reflash, I'm thinking.

..I know the '05 models have pressure controlled via in tank FMU and not a remote FPR, but the '04s are just the plain old, supply/regulator/return line system.

Good info! I was wondering why I could not locate a FPR on the fuel rail of my 2005. There's only a shraeder valve about where the FPR *used* to be. Interesting. What is FMU?

Thanks
Joel

Good info! I was wondering why I could not locate a FPR on the fuel rail of my 2005. There's only a shraeder valve about where the FPR *used* to be. Interesting. What is FMU?

Thanks
Joel
Pump voltage is increased /deceased on demand by the pcm based on engine load, the system is returnless and of course no regulator, no inline filter either.Actually I believe the pump is pulse width modulated by the pcm rather than actual voltage changes to the pump, I will look into that. FMU, Fuel Management Unit.

..I believe the pump is pulse width modulated by the pcm rather than actual voltage changes to the pump, I will look into that. FMU, Fuel Management Unit.

I guess the good thing is less plumbing, bad thing is anything with "management unit" in it sounds expensive :uhoh: !

Thanks
Joel

it is expensive....that "little black box" is one of the more expensive parts of a "modern" car. EBCM's(Electronic Brake Control Module) are worse. did one on a Tahoe the other day, over $900, JUST FOR THE PART!

As not to start a new thread... I gather the 03's fuel filter is in the same area along the frame as the 02?? I need to change mine this weekend. So... no special tools needed?? On my ford truck,you got to have them special line quick disconnect tool.:banghead:

Samr place, same disconnect tool for all the GM lines.

Thanks Max.. I guess I can buy them at a local autoparts store.. might as well get them along with the filter.

No special tool needed. Just a set of needle nose pliers and a small phillips,took less then 5 monutes.