: Changing fuel filter



NelsonSTS
10-29-10, 11:27 PM
I'm going to be changing the fuel filter on my '05 STS. What is the exact location of the fuel filter? I read online that its by the fuel tank on the right rear passenger side. I also read about a special tool to disconnect the quick-connect fittings on the filter. How necessasry is this tool and can I use a substitute for it like a pair of pliers? Thanks

Regulator
10-30-10, 09:16 AM
This is one nasty job. I would advise you to pay a jiffy lube type place to do it for you....well worth it.

Otherwise, my recommendation is to buy the expensive GM fuel filter removal tool and it takes much more muscle than you think it would in order to get the tool wedged in the line to remove the filter. When the filter is removed, be prepared for plenty of gas getting everywhere.

To answer your question....there is no way you can remove the filter without this tool. In fact, you almost can't remove it with the tool.

Good luck

EChas3
10-30-10, 09:48 AM
Some members report success with less expensive 'generic' tools. EWill3rd tells us that Cadillac no longer considers fuel filter replacement as periodic scheduled maintenance. He only recommends replacement when an issue suggests reduced fuel flow.

NelsonSTS
10-31-10, 08:45 PM
I take it since there was no comment on the location I stated for the filter I atleast have the correct spot. And depending on how I feel this coming weekend will decide on if I change the filter myself or take it somewhere. Thanks again guys.

Pjazz
10-31-10, 09:29 PM
I'm glad this was asked. I was debating if I should pay the stealer a recommended 50k fuel filter replacement plus some type of injector flush. I know I don't want to deal with replacing the filter myself, and since the car is running pretty smoothly maybe I won't bother.

EChas3
10-31-10, 09:32 PM
Hey guys! Can anyone confirm the fuel filter location for Nelson? A pic would make his task much easier.

Pjazz - Spend the $90 on throttle-body service or clean it yourself. You'll enjoy the improved throttle response (IMHO).

Midnight
10-31-10, 11:57 PM
I changed mine, it was on the passenger side like in front of the rear tire, not too bad to get to. You definitely need fuel line disconnector tools of the right size... and even with them it takes a ton of hand strength to pop them. At least mine did. Also, there's hardly any room - if my tools had wasted any space they wouldn't have worked. Mine were this kind: http://www.greatnecksaw.com/images/product_images/large/25052.jpg

NCgator8
07-04-15, 11:16 AM
I'm going to be changing the fuel filter on my '05 STS. What is the exact location of the fuel filter? I read online that its by the fuel tank on the right rear passenger side. I also read about a special tool to disconnect the quick-connect fittings on the filter. How necessasry is this tool and can I use a substitute for it like a pair of pliers? Thanks

The tool is very necessary. A pair of pliers will not work without tearing everything up. Spend a few dollars and get the tool- K-D 3321. Now, according to the service manual, there may be a couple of different types of fittings used, so check for that as well.

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This is one nasty job. I would advise you to pay a jiffy lube type place to do it for you....well worth it.

Otherwise, my recommendation is to buy the expensive GM fuel filter removal tool and it takes much more muscle than you think it would in order to get the tool wedged in the line to remove the filter. When the filter is removed, be prepared for plenty of gas getting everywhere.

To answer your question....there is no way you can remove the filter without this tool. In fact, you almost can't remove it with the tool.

Good luck

It has been my experience that if you push the fitting toward the tool first to disengage it, that works much better.

EChas3
07-05-15, 07:33 PM
They must have changed the design. More than one member post referenced the ease of the job on 2005-7 models as long as an inexpensive tool was used.

EWill3rd once posted the fuel filter change was even dropped from the regular maintenance schedule. Use Top Tier fuel and it never gets dirty.

NCgator8
07-06-15, 06:58 AM
A little note about changing the fuel filter- even though I have never had to bleed a fuel rail, this one I did, because the car would crank for many seconds before starting after changing the filter. Prior to changing the filter, it would start right up. Maybe due to the design of the rail, as it sits a ways above the injectors. I do not recall any mention of this in the Service Manual. OBTW, the Service Manual does have the procedure for changing the filter. IMHO, the procedure would not be in there if they did not think that it may need periodic service or replacement. Just sayin'.

Maximln
07-06-15, 10:04 PM
I'm just double checking. I didn't notice anything in the maintenance schedule about changing the fuel filter & a few people have noted that changing it is no longer necessary unless there is an issue. I just got the 08 so I want to make sure I am doing all the proper maintenance. Come to think of it, I don't think I ever changed it on my 06 with 160k & I never had any issues either!

Max