1AFPU00307-Chevrolet GMC Buick Olds Isuzu Fuel Pump & Sending Unit Assembly


Chevrolet GMC Buick Olds Isuzu Fuel Pump & Sending Unit Assembly TRQ


Part Details

This part replaces:

  • Airtex E3549M
  • Dorman 2630353
  • Hollander 323-01416
  • Spectra Premium Industries TNKSP3550M
  • TRQ FPA61912
  • OE # 88966952
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List: $96.95 Save: $22.00
Part 1AFPU00307
In Stock

Orders must be placed by 2pm ET
Delivery options for:

Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Brand #: FPA61912

Frequently bought together

Vehicle Fit
Warranty & Shipping
How-To & Tools

Our electrical and electronic parts are subject to strict quality testing.

Parts cannot be returned after they have been installed. Contact us with any questions before installing the parts.

This fuel pump includes a new electrical connector harness. You will need to remove your existing electrical connector and install the new connector provided in order to install your new fuel pump (instructions are included with the pump).

This fuel pump is not a universal fit item. Because your vehicle’s original connector is prone to failure due to corrosion, cracking, loose pin housings, and wire crimp issues, the OE manufacturer has changed the shape of the connector, requiring the install of a new electrical connector during fuel pump service.

Rigorously Tested

Meets or exceeds all SAE fuel pump performance and durability standards

Highest Quality Material

Consistent high quality plastic molding media.

High-carbon motor commutator and brushes for longer pump life

Direct Fit Replacement

Guaranteed to fit and function correctly for your specific application

Item Condition: New

Attention California Customers:

WARNING:  This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.

  1. step : Disconnecting the Fuse Relay (1:07)
    • Turn on the vehicle
    • Disconnect the fuel pump relay #41
    • Let the engine die
    • Shut the vehicle off
    • Connect the fuel pump relay
  2. step : Disconnecting the Fuel Lines (1:39)
    • Have a drain pan ready
    • Remove the cap from the fuel line
    • Press the valve to release any remaining fuel
    • Push the tabs on either side of the hose and disconnect the rubber fuel hose
    • Disconnect the fuel line to the filter and the two fuel lines above
  3. step : Loosening the Fuel Tank Filler Neck Hose (2:54)
    • Loosen the hose clamp on the fuel filler neck
    • Disconnect the hose from the fuel filler neck
    • Disconnect the wiring harness on top of the gas tank
  4. step : Removing the Gas Tank (3:36)
    • Remove the four 15mm bolts on the crossbar below the gas tank
    • Jack up underneath the gas tank
    • Remove the 15mm bolts from the gas tank straps
    • Use a reciprocating saw or air hammer to remove any rusted bolts
    • Bend the second gas tank strap out of the way to remove the tank
    • Slowly lower the jack
    • Disconnect the wiring harness on the back of the tank
    • Disconnect the fuel sending harness on the top of the tank
    • Lower the gas tank out
  5. step : Removing the Fuel Pump and Sending Unit (6:49)
    • Clean any fuel or debris from the top of the tank
    • Push in the tab and disconnect the fuel lines from the sending unit
    • Use a pick to clean off any rust from the line and a hammer and chisel to remove them if needed
    • Hammer the retaining ring with a hammer and chisel
    • Work the clip out while hammering the ring out at the same time
    • Lift the ring up without dropping rust into the gas tank
    • Remove the fuel pump and sending unit
    • Clean out any debris from around the sending unit
  6. step : Inserting Fuel into the Gas Tank (9:19)
    • Insert a funnel into the gas tank
    • Insert a paper towel in the funnel to filter the gas
    • Pour any excess fuel removed back into the tank
  7. step : Installing the New Fuel Pump and Sending Unit (10:23)
    • Transfer the rubber washer and the clips from the old fuel pump the new one
    • Insert the new fuel pump and sending unit into the tank
    • Hammer the retaining ring in place
    • Push the fuel lines into the sending unit
  8. step : Reinstalling the Gas Tank (11:48)
    • Lift the fuel tank up into place
    • Place a jack underneath the gas tank
    • Connect the wiring harness on the top of the gas tank
    • Tighten the 15mm bolts to the gas tank straps
    • If your fuel tank strap remained in place skip to step 9
    • If the other gas tank strap fell out remove the four 11mm bolts on the drive shaft
    • Replace the bracket and bolts by a few threads
    • Pry the drive shaft out with a flat blade screwdriver
    • Remove the bolts and brackets
    • Pull the shaft down and insert the strap into place
    • Insert the shaft in place
    • Tighten the 11mm bolts to the drive shaft
  9. step : Tightening the Fuel Tank Filler Neck Hose (15:13)
    • Lower the jack from the gas tank
    • Connect the harnesses on the side of the gas tank
    • Push the fuel tank filler neck hose in place
    • Tighten the clamps on the fuel tank filler neck hose
  10. step : Reconnecting the Fuel Lines (15:56)
    • Connect the upper fuel lines into place
    • Insert the fuel lines into the fuel filter
    • Reinstall the cap to the fuel line
    • Replace the cross bar and tighten the 15mm bolts to the cross bar

Tools needed for replacement:

    General Tools

  • Chisel
  • Drain Pan
  • Floor Jack
  • Hammer
  • Jack Stands
  • Pick
  • Reciprocating Saw

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 15mm Socket
  • 7mm Socket

  • Wrenches - Metric

  • 11mm Wrench

Need help? Ask one of our Auto Experts
Need help? Ask one of our Auto Experts
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
Does this pump need a filter on the bottom?
Nicholas R August 5, 2016
No your unit has a inline fuel filter
John W August 6, 2016
Has a built in screen no filter necessary
Stephen R August 7, 2016
Blazer will turn over but wont start. I cant hear fuel pump run. Tank has 3/4 of fuel. I replaced the fuel relay and still doesnt run. Could it be the fuel pump?
Edward S December 29, 2016
Yes..I had the similar problem and started with the fuel relay and ended up changing the fuel pump
Juan E December 29, 2016
Yes, it could be the fuel pump. It is not that hard to change even if the tank is almost full. I used a motor cycle jack and lowered it down with the car up on car ramps. You might want to buy new straps for the tank the old ones will most likely be rusted out
Ken S December 29, 2016
Do you know what might be wrong with my car it said low oil pressure then started puttering. Then the steering wheel got tight and I parked it and it wouldn’t turn back on. Is it the fuel pump?
Jon W October 18, 2017
We recommend a professional diagnostic as this could a variety of things. You may start by obtaining the CEL codes if apparent on the dash to provide a initial direction.
Alex P October 18, 2017
Hi would this item fit my 2003 Chevy trailblazer LS 6 cylinder?
Kiara T December 5, 2017
Yes, as long as your 8th VIN digit counting from left to right is an "S".
Alex P December 6, 2017
My car will not start after replacing the fuel pump?
Brad K May 21, 2018
Unfortunately the fuel pump I installed only lasted 9 months to a year and was hard starting from the get-go no substitute for quality when you buy two cheap check fuel pressure verify you have spark at the ignition
Robert R June 12, 2018
Also verify the fuel pump relay is functioning. Did it come with a new fuel pressure sensor?
T E October 30, 2018
Check your ground
J U March 31, 2020
How to return a part under warranty?
Leon D June 4, 2018
Hello. If youd like to return a part you can contact us at the phone number on our website, or the email as well.
Peter L June 4, 2018
G A July 27, 2019
Hey guys how is the quality of this unit ? How long has it lasted yall ? Thanks
Timothy T November 3, 2019
Works great no issues
A D November 3, 2019
1A Autos house brand parts are manufactured by various aftermarket companies specifically for us and built to your vehicles exact OEM specifications. The part carries a lifetime warranty on it against manufacturing defects so you should not have any issues with the product. Please let us know if you have any other questions.
Emma F November 3, 2019

Fits the following Makes:

Year Make Model Description
2004Buick Rainier Buick Rainier V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly
2004Buick Rainier Buick Rainier L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2002-2004Chevrolet Trailblazer Chevrolet Trailblazer L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2004Chevrolet Trailblazer Chevrolet Trailblazer V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly
2002-2004Chevrolet Trailblazer EXT Chevrolet Trailblazer EXT L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2004Chevrolet Trailblazer EXT Chevrolet Trailblazer EXT V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly
2002-2004GMC Envoy GMC Envoy L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2004GMC Envoy GMC Envoy V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly
2002-2004GMC Envoy XL GMC Envoy XL L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2004GMC Envoy XL GMC Envoy XL V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly
2004GMC Envoy XUV GMC Envoy XUV V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly
2004GMC Envoy XUV GMC Envoy XUV L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2004Isuzu Ascender Isuzu Ascender L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2005Isuzu Ascender Isuzu Ascender V8 5.3L (8th Vin Digit M) Fuel Pump & Sending Unit Assembly
2005Isuzu Ascender Isuzu Ascender V8 5.3L (8th Vin Digit M) Fuel Pump & Sending Unit Assembly
2002-2004Oldsmobile Bravada Olds Bravada L6 4.2L (8th Vin Digit S) Fuel Pump & Sending Unit Assembly
2003-2004Oldsmobile Bravada Olds Bravada V8 5.3L (8th Vin Digit P) Fuel Pump & Sending Unit Assembly

Part Interchange

Brand Label Part Number
Airtex E3549M
Spectra Premium SP3550M
Spectra Premium Industries SP3550M

This item may be interchangeable with parts from other brands with the above part numbers. This information is provided only for reference and does not guarantee that the item you are purchasing is identical to parts with part numbers from the brands listed above. To confirm that this item fits your vehicle, use the above "Check Vehicle Fit" option.

Brand #: FPA61912
Product Reviews
4.35/ 5.0
31 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
we were very happy with the item and was delievered on time, will do more with this company, they said the gasket wouldnt come with it, but it did,got everything with it ,installed like the old one with no problems,
January 26, 2017
possible fuel level issue
Great price and vehicle runs great but..... fuel gauge took 15 minutes and 10 miles to climb almost to full when I filled the tank. Hopefully its just a fluke and will correct itself?
January 30, 2017
Fuel pump didnt work
Fuel pump is defective and does not work. Ended up taking to garage to get fixed. Customer service was great, issued a refund promptly
February 6, 2017
This part worked no problems during or after installation plus I saved lots of money doing the installation myself.
February 10, 2017
Replacement of Fuel Pump
The module was a little different from the original, but following the video on removal and installation, the job went fairly smoothly. Works great and no more leaks. My Trailblazer is almost 14 years old, but with the help of 1A, it will live on a few more years.
February 14, 2017
Exactly what I needed. Great price!!!
Fuel pump works great at an unbelievable price. I opted for two day shipping, didnt get it until the forth day. They refunded all shipping charges??
February 18, 2017
It was delivered promptly and installation was very easy after the tank was removed. The tank level gauge was slightly higher but after tank was filled it shut the gas pump down at the full line instead of reading higher on the gauge. Now when it gets real low I know I still have about 2 1/2 gals left which is great for turnpike driving. Thanks for the great service and product.
March 13, 2017
Fuel pump assembly
Exact fit and it works perfectly , everything I have purchased from 1A has been very good service. I have recommended the company to many family members and friends
May 18, 2017
Fuel Pump
I was completely with the service, speedy delivery, and quality of the product I received. I had trouble with my credit card going through (my own fault) and the guys were very helpful!
June 25, 2017
Highly recommend
I am very pleased with this purchase. I actually had to call the company to make sure there wasnt a mistake on the price. The gentleman I talked to was very nice and knowledgeable about the product. I have purchased from this company many times and have never had a bad experience.
November 7, 2017
So far its working
Has bin in for about 6 days. But cant trust my gauge anymore must be a ground issue somewhere im thinking
November 16, 2017
Worked great, on time delivery love dealing with 1aAuto always good experience!
December 30, 2017
Not satisfied
Turns on will work fine for a bit then shuts off. All that work to drop the tank and have to replace it again with a better unit
January 4, 2018
5.3l chevy trailblazer ext fuel pump
I was very satisfied with the price of the fuel pump i ordered. The quality of the assembly was much better tha expected. The delivery time frame was up to par as well i would highly recomend 1a auto for any of your auto parts needs i have ordered several times from them and will continue to shop with them for all of my aito needs
April 7, 2018
Fuel pump & Sending Unit Module
Perfect. Fit my 02 Envoy just like it came from the factory. It says the gasket doesnt come with the package, but guess what, it was in there. So happy I shopped around!
April 24, 2018
GMC fuel pump
I couldnt be happier. The price was right ,the delivery was fast . Thanks 1aAuto
April 27, 2018
Easiest part of the job was ordering and installing the unit. Now the rusty piece of crap that I had to dig out of the fuel lines was another story. The unit was delivered in a couple days with standard FREE shipping. None of that week to 10 days crap for 1AAuto.com! Unit came with a replacement connector, but my connector was fine and the new unit plugged right in. Tested my pressure afterwards and right at the upper end of spec! Good job 1A Auto! The only problem I had was the fuel line O-rings were not up to the task , is I had to drop the tank a 2nd time and replace those. But that was not the new units fault. The old unit had rusted so bad that the O-rings were damaged so do yourself a favor and change the O-rings on both pressure and return lines. Thanks Guys. Saved me several hundreds of dollars by doing it myself. Watching the videos were very helpful!
August 23, 2018
great service and great part
part installed just fine, and problem is solved. I would recommend 1afp to everyone. GaB
September 21, 2018
Feul pump
So far so good very good product and big savings on the pockets.. will not order parts from anyone else.. thanks
September 28, 2018
fuel pump
actualy you sent me the wrong fuel pump I dont know what it fits but it aint what I orderd
October 6, 2018
Great service
Art was correct and shipped in a very timely manner. Would order from 1Aauto any time for any needed parts needed in the future without hesitation! Great DYI vides also.
October 30, 2018
Happy with my service and product. This is the second time I ordered from you and never had an issue.
December 2, 2018
The best part’s hands down.
Why spend money at those other auto part store’s. 1A Auto is the place to shop for quality part’s. I love saving money and they can definitely save you a lot of dollar’s.
December 25, 2018
Good product
Ordered this part to avoid paying $1,500 at the dealer. Very satisfied with the whole experience. Good quality part. Great price.
February 1, 2019
Fuil pump
Fast delivery and was just what I ordered and was good price
March 20, 2019
Fit like a glove
Fuel pump and sending unit module fit parfect and raised the fuel pressure to the required pressure . All is running like a new one . The quality of the pump is as good as the oe i took out !
June 26, 2019
easier than expected
the new pump gave me complete satisfaction. Its design made the change over simple.
July 20, 2019
new fuel pump chevy trailblazer
I just finished installing my new fuel pump from A1auto and it was a direct fit for my vehicle. I am very happy with the product and this is the second or 3 time to buy from them and will continue to do so as the part always fit and are quality. thanks again A1auto. Kevin Rosien
July 30, 2019
I was really pleased with how quick I received my order. Parts n box they came in were in perfect shape part fit nicely n works like a charm thank u so much 1AAuto for ur speediness on sending my order out n such perfect parts
August 22, 2019
Dont buy this
This part was on my truck for 2 weeks and completely failed. I dont even drive 50 miles a week either. I dont even know if I want to check for a warranty or just take the lost.
July 22, 2020
2004 Trailblazer Fuel Pump
Fuel pump was a perfect fit, works well. Fuel gauge works fine too. Removing the gas tank was was the hard part.
July 31, 2020
Customer service


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Saturday - Sunday 8:00am - 4:30pm ET

Chevrolet GMC Buick Olds Isuzu Fuel Pump & Sending Unit Assembly TRQ-1AFPU00307 does not fit your:

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