fuel pump change - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-04-2003, 03:55 PM   #1
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Is there a way to change the fuel pump without having to lower the gas tank on an 89 Bonneville? For instance, is it accessible by removing the back seat?? I've seen that feature before on other cars.
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Old 11-04-2003, 04:00 PM   #2
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Old 11-04-2003, 08:24 PM   #3
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Sales Fell in October for G.M. and Ford

DETROIT, Nov. 3 - Reporting one of the domestic automobile industry'* toughest months yet this year, the General Motors Corporation and the Ford Motor Company said on Monday that sales fell in October from the month last year.

G.M. said its sales dropped 7 percent in October, while Ford said sales fell 2 percent. Among the Big Three, only the Chrysler Corporation, a unit of DaimlerChrysler of Germany, reported a gain over last year, rising 11 percent to let it remain in third place ahead of the Toyota Motor Company of Japan, which said sales rose 11.7 percent in October
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I wonder if GM would start to design their cars with access to the fuel pump under the rear seat just like the Germans and some of the Japanese manufactures do, their sales just might rise.

But all seriousness aside, GM should start designing cars so that replacing a fuel pump will be just as easy as replacing the alternator(though just not as often).
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Old 11-04-2003, 09:52 PM   #4
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Suspect is a safety issue, they are afraid that if there was a removable panel, people would leave them off. Also the assembly is all steel pipes to the side of the tank, whould have to be a heack of a big panel.

Just dropped the tank to replace one in my '90. Two people helps. Will say ist is almost impossible to snake a siphon hose around all of the bends in the filler tube, fortunately was only at 3/4 so not much came off when pulling the hose off the tank. Siphoned out about 10 gallons.

Manual is right, you just remove the last five screws on the heat shield and the one bolt on the pipe hanger at the inlet to the muffler and the exhaust hangs down far enough to slide the tank out.

Recommend the AC Delco part - EP378 aka 25163468 - about U$70 delivered from GMPartsDirect and $74 at Autozone. Comes with a baggie having a new doughnut ring for the top of the tank & a few other odds and ends. Always replace the strainer also because they get brittle.

I always off the top of the tank with an air gun before losening the ring, keeps debris out of the tank.

Anyone figured out what the wrench size is for the fuel filter ? I used a 13/16" open end but felt more like a 20mm.
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Old 11-04-2003, 10:52 PM   #5
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All correct data padgett, but its a hell of a lotta work for someone who is not mechanically inclined...I watched an amateur (with some guidance) fix his Golf...its was like candy from a baby

GM should fix that issue, a simple pump should not be a $900 dollar job at the dealer for someone who doesn't have the time, hardware, resources or know - how
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Old 11-04-2003, 11:56 PM   #6
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I'm just worried about the metal straps and the possibility of rust on the top of the tank. Its just so risky for amateurs to do. Guess I need to bring my RLD down to FL for routine maintenance eh Don?
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Old 11-05-2003, 12:01 AM   #7
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I'll distract Paul and accidently leave it there
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Old 11-08-2003, 06:23 PM   #8
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Is it possible to cut an access hole in these cars for a fuel pump change? I have seen it used on 86+ F-bodies with great success.
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Old 11-08-2003, 07:42 PM   #9
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Quote:
Originally Posted by PLANT PROTECTION
Is it possible to cut an access hole in these cars for a fuel pump change? I have seen it used on 86+ F-bodies with great success.
Anything is possible, but I would recommend that you drop the gas tank before you torch a hole through to get to the fuel pump.
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Old 11-08-2003, 09:04 PM   #10
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That'* an interesting idea. Perhaps a soaked blanket in between while carefully doing it. If my trunk wasn't so full right now, I'd go and see where the hole would be.

Maybe this should be up in brainstorming.
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