Thread: Is this normal? Replacing fuel pump in 2003 Grand Prix

Originally Posted by VinnieGTP

If you truely are just terrified to do this yourself, maybe this is a good option for you:

Replacement Fuel Pump Assembly

Wow Vinnie, are these new? The new fuel pumps I've seen on the net are over $200!


Either way, I'm willing to go with a new OR used one, and it's not that I'm terrified at all, but I just don't have hardly any mechanic knowledge at all, and if I had some sort of guide/instructions/manual, that would be a huge help.

I found these instructions for a 97 on Wikianswers -(WikiAnswers - How to replace a fuel-pump on a 97 grand prix)

In the trunk under the carpet is an acess pannel with about ten plastic 10MM nuts. After removing the nuts remove the pannel, under the pannel is the top of the sending unit. Remove the three lines. One is the pressure. One is the return line and the other is the vapor line. After removing the three lines disconnect the electrical connector remove the snap ring and lift the sending unit out of the tank. reverse precedure for reinstalling


They didn't have anything for a 2003, but what scared me is when I read the instructions for a 99, it mentioned "first thing remove ground battery cable", and so I'm thinking that it'd be a disaster, if I missed a detail like this.

I mean I could just picture myself not doing something, and then the gas somehow igniting, etc.....




Oh and Street Wolf, tell NOS the cat that I am sorry!

Yeah see, that's why I need instructions, or a step by step guide or manual.


I'm searching the internet for that right now, but if anybody can point me to something..... thanks.

Vinnie, about the fuel pump, is there really a difference between that and a regular one that would make it "easier to install"?

I'm looking at the picture of that one, compared to the one listed by MORAD, and they look exactly the same.

So I'm wondering which one I should go with, the used one -





or the new one that isn't "AC Delco"?

Oh and I was almost there, as I found out about a "Haynes manual", but just my luck, they do not cover Pontiac Grand Prix 2003 -

Haynes Repair Manuals

Well you guys probably know this already, but I found this -

Mitchell 1 eAutoRepair - Do-it-Yourself Repair Information

Originally Posted by Zef_66

The best writeup that I can find is here.

But that is about fixing the fuel sending unit. But it gives an overview of what you will be doing as far as taking things apart with some pictures. Not great for a beginner, but it is a start. I will keep looking.

Wow thanks Zef!


That helps!!!


I think I just found one though, let me know what you think of what I just posted when you have a sec.

Originally Posted by VinnieGTP

The container is the same, it's the pump I was talking about that's not a Delco unit. If Morad is selling low mile OEM drop ins I would go that route. He has a 90 on them anyway I think.

Here are more instructions that may show different angles:
http://www.intense-racing.com/walbroinstall.shtml

Wow, those are some great instructions!


THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!

Originally Posted by Zef_66

Mitchell is pretty good, but you have to pay for it. Nothing any better than the writeups that we posted here.

Don't waste your money on Mitchell.

Wow, I see your point!


I can't imagine much difference between the one that Vinnie posted, and the Grand Prix 2003 SE.


I just ordered the pump from MORAD, and the total cost for that was only 80 bucks!!!

Compared to the new units which are around $235, that's a good savings if this thing has decent life left in it.

Originally Posted by Street Wolf

Regardless of what any dealer, or 'mechanic' tells you, there IS, absolutely without a doubt, even without me looking for myself, if you own a Grand Prix, there IS a access panel in your trunk under the carpet right behind your fold down access in the rear seat.

Knowing i want some nitrous you had to post them pics with the bottle in the trunk huh?

Originally Posted by TDCRacing

Knowing i want some nitrous you had to post them pics with the bottle in the trunk huh?

Rofl, sure did.


Just be happy I did'nt show you the other bottles, and the pile of solenoids and lines that are laying around as well.

Why is it that I fill up the tank and gas seems to spill underneath the car? Is it the way I put back the fuel pump? Is it the O-ring or the way the c-clip(new) is fastened?

Originally Posted by qwertyuiop12345

Why is it that I fill up the tank and gas seems to spill underneath the car? Is it the way I put back the fuel pump? Is it the O-ring or the way the c-clip(new) is fastened?

take the cover off and take it down and fill it up ---- it could be any of those things as well as the two lines that aren't the pressure line not being clipped on properly.

Or a hole in the tank, of course.

I didn't lubricate the o-ring...I slid it down the pump a bit instead of bringing it up to the assembly where it usually is. I'm thinking that can be the culprit.