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2026 Buyer's Guide: 2013–2014 GM Fuel Pump Assembly — Buick LaCrosse, Regal, Chevrolet Malibu & Impala
Does your 2013-2014 LaCrosse, Regal, Malibu, or Impala crank for several seconds before it fires? Do you hear a hum from the rear of the car that keeps getting louder? Both point at the fuel system, but not always at the same part. This fuel pump assembly for the 2013-2014 Buick LaCrosse, Regal, Chevrolet Malibu, and Impala is the tank unit, in stock at $93.90.
Two pumps, and mixing them up costs money
Direct injection means the injector sprays fuel straight into the cylinder. Older port injection sprayed it into the intake instead. Building that pressure takes two pumps working in stages.
The tank pump assembly is the electric unit inside the fuel tank. It lifts fuel to the engine at roughly 50 to 94 PSI. Think of it as the feeder.
The high-pressure pump is a small mechanical pump driven by the camshaft. It squeezes that feed to 2,000 PSI and more before fuel reaches the rail.
- Tank pump assembly — electric, inside the tank, fails with long cranks and tank noise.
- High-pressure pump — mechanical, on the engine, fails with hot-start trouble and rich-running codes.
- Both are normal wear items. Replacing one does not fix the other.
Your engine decides which pump you own
Four-cylinder cars carry the 2.4L LEA, the 2.4L LUK eAssist, or the 2.5L LCV. Turbo cars carry the 2.0L LTG, and V6 cars carry the 3.6L LFX.
All five engines appeared across the 2013-2014 LaCrosse, Regal, Malibu, and Impala lineups. All five are direct-injected, so all five depend on both pumps.
The four-cylinder high-pressure pump carries GM number 12641847. Match yours with this list:
- 2.0L and 2.5L four-cylinder — this high-pressure fuel pump for the 2013-2015 Chevrolet Malibu 2.0L and 2.5L at $109.89.
- LaCrosse, Regal, Terrain, or Verano — the high-pressure fuel pump for the Equinox, Malibu, Orlando, Terrain, Verano, LaCrosse, and Regal.
eAssist cars add a 115-volt battery under the hood. Any engine or fuel work on a 2013 LaCrosse or Regal eAssist starts with its disconnect procedure. Skip it and you risk a shock, so leave that job to a shop.
The symptom matrix
Symptoms overlap, which is why so many owners buy the wrong pump. This table sorts the common ones:
| Symptom | Most likely cause | Why |
|---|---|---|
| Long crank, then it fires | Tank pump lost its hold-prime | Pressure drains back after shutdown, so the pump rebuilds it from zero |
| Stalls hot, restarts hard | Weak pump or worn high-pressure pump | Heat raises electrical resistance, and worn pump parts lose output |
| Loud hum or whine from the tank | Tank pump wearing out | Worn bearings and a clogged strainer make the motor work harder |
| Hesitation, hills, hard pulls | Low-side supply falling short | Demand climbs under load and a tired pump cannot keep up |
| No start at all | Check power first | Fuse, relay, or the pump control module near the tank |
The numbers that matter
| Item | Value |
|---|---|
| Part covered | In-tank fuel pump module assembly: pump, strainer, reservoir, level sender, seal |
| Low-side pressure target | 50-94 PSI (345-648 kPa) on these direct-injection engines |
| High-side range | Roughly 290 to 2,176 PSI, rising with engine demand |
| Four-cylinder high-pressure pump | GM 12641847, driven by the camshaft |
| Aftermarket cross-reference | E4045M, cataloged at 80-90 PSI with an oval connector |
| KOEEP pricing | $93.90 assembly, $95.98 E4045M, $109.89 four-cylinder high-pressure pump |
Diagnose it in this order before you buy
Work top to bottom and you will not replace a healthy pump:
- Turn the key to ON with the engine off. Listen at the filler neck for a two-second hum.
- No hum? Check the pump fuse, the relay, and the connector near the tank first.
- Hum present? Fit a fuel pressure gauge and read the low side while cranking. You want 50 PSI or more.
- Shut the engine off and watch the gauge. A reading that drains to zero within minutes is a hold-prime failure, and that is your long crank.
- Low side healthy but problems remain? Now the high-pressure pump and its codes deserve attention.
One more suspect lives near the tank on these cars. The fuel pump control module — the small computer that switches the pump — is a known failure point on 2013-2015 Malibus. Rule it out before you drop the tank.
Codes help you pick a side. Low-side codes mean the tank pump; rail-pressure codes mean the high-pressure pump:
- P228C / P00C6 — rail pressure too low while cranking, so the low side is starving the high side.
- P0089 / P228D — rail pressure performance, which points at the high-pressure pump.
- P0231 / P0232 — pump circuit low or high, which means fuse, wiring, or control module territory.
- P018B / P2635 — pressure sensor or pump performance codes worth checking with a gauge.
The E4045M number, explained
Aftermarket catalogs speak their own language. The E4045M is an Airtex-family reference number for the module that fits the 2013-2015 LaCrosse, Regal, Malibu, and XTS. It is not a GM part number.
The value of that number is comparison shopping. Catalog data describes it as an 80 to 90 PSI unit with an oval connector and a sealing ring included.
This E4045M fuel pump module assembly for the 2013-2015 Chevrolet Malibu and Buick LaCrosse is $95.98 at KOEEP. Dealer-catalog equivalents for the same job list around $400.
- Need other fuel or ignition parts while you are in there? The engines and engine parts collection gathers the rest of that lineup.
Read your engine code before you order
One trap hides in the model names. The 2013 Impala is the previous generation, and the 2014 Impala is the redesigned car. Same badge, different car underneath.
So match parts by model year and engine code, never by the badge alone. Your engine code is the eighth character of the VIN, and it is also printed on a sticker under the hood.
Want the same fitment detail in checklist form for later? The 2013-2014 GM fuel pump assembly buyer's guide on our blog works through the specs step by step.
Repeat the hold-prime test before ordering anything else. A fast pressure drop points at the check valve, a leaking seal ring, or a connector that never fully seated.
If the low side holds steady and hot starts stay hard, the mechanical high-pressure pump becomes the next honest suspect.
Frequently asked questions
Is the tank pump assembly the same as the high-pressure pump?
No. The assembly feeds at 50-94 PSI, and the high-pressure pump raises that above 2,000 PSI. These direct-injected cars need both.
Why does my car crank so long before starting?
The fuel system is losing prime after shutdown, so the pump rebuilds pressure from zero. A hold-prime test on the low side shows it.
My 2013 Malibu hums loudly from the tank. Is that the pump?
A whine that keeps getting louder is a classic weak-pump sign. A clogged strainer or frequent low fuel levels make it worse.
Does the assembly include the fuel level sender?
Complete modules do, and the E4045M cross-reference ships with a strainer and sealing ring. Match your unit before ordering.
Can a weak tank pump damage the high-pressure pump?
Yes. The mechanical pump depends on the low side for cooling and lubrication, so starving it wears it out early.
Where is the pump on these cars?
Inside the fuel tank, reached through an access opening under the rear seat or trunk floor depending on the model.
Do I need programming after replacing the pump assembly?
The assembly itself needs no programming. Cars with a separate pump control module may need a relearn after that module is changed.
Get the right pump the first time
The 2013-2014 LaCrosse, Regal, Malibu, and Impala fuel pump assembly is in stock at $93.90. Still unsure which pump your engine calls for? Send a request for a quote, email support@koeep.com, or message us on WhatsApp.
- Low-side fuel pressure target of 50-94 PSI (345-648 kPa) for the 2013-2015 Chevrolet Malibu 2.5L — Go-Parts fuel system technical data
- High-side rail pressure range of roughly 290-2,176 PSI on GM direct-injection four-cylinder engines — JustAnswer GM fuel system data
- Documented long-crank case with low-side pressure falling to 0 PSI after shutdown — Chevy Malibu Forum, "Long cranking time, 2.0L" thread
- GM high-pressure fuel pump and direct injection system overview — TediousRepairs.com guide
- E4045M module specifications: gasoline, strainer inlet, sealing ring, 12 V, 80-90 PSI, oval connector — eBay and GearUpAuto catalog listings
- GM 12641847 high-pressure fuel pump covering 2.4L and 2.5L engines, 2010-2017, including 2013-2014 Malibu — Amazon and GM parts catalog cross-references
- 115 V eAssist battery disconnect procedure on the 2013 LaCrosse eAssist — GMC Terrain Forum, "Difference between 2.4 and 2.4 LUK mild hybrid" thread
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