Direct Drop-In In-Tank Fuel Pump, 99-04 GM Truck

Direct Drop-In In-Tank Fuel Pump, 99-04 GM Truck

Part Number: 18312
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Product Info

This system is designed to work in trucks equipped with the OEM plastic fuel tanks only; some of the 1999 models may still have a steel tank, which will not fit this Phantom series. The 1999-2004 models with a plastic tank for which this Phantom is designed use a smaller factory opening than the later 2005-2017 models, which have their own series of Phantom drop in kits.

The smaller opening in the 1999-2004 tanks does limit the pump configurations which will fit.  These tanks will accommodate several pump options including; a single 340, a dual 340, and a single 450 pump. Any other combination of more/larger pumps will not physically fit through the factory tank opening.

The Silverado and Sierra tanks have a tank depth of approximately 14.00”, while the other models are shallower with depths around 8.25”. The Phantom systems will accommodate both.

The 2500 truck models can be up to 17.00” deep; the Phantom system will also accommodate this as well.

Not configured for use with the OEM, pulse-modulated-to-pressure, pump control.

Requires installation of return style fuel system including high flow AN style fuel lines, fuel filter and EFI bypass regulator with return line.  Contact Aeromotive Tech Support with any questions and for more information.

This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.

Horsepower Ratings

 


 

Additional information


  • Must be a new body style/plastic tank for the model year 1999



This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.

Installation Instructions

Instruction Manual
18312 Installation Instructions

Download PDF
Instruction Manual
18313 Installation Instructions

Download PDF
Instruction Manual
18314 Installation Instructions

Download PDF

Product warranty

Limited Warranty for Aeromotive Products for the United States of America

Aeromotive, LLC warrant to the original end user purchaser in the United States that the Aeromotive and Waterman Racing Components branded products (“Product(s)”) shall be free from defects in material and workmanship for the warranty durations set forth in the chart below from the date of purchase or delivery, whichever is later.

 Products Warranty Duration
  • Aeromotive marine pumps
2 years
  • All other Aeromotive products
  • Waterman Racing Components products
1 year

 

Because Aeromotive, LLC (collectively, the “Company”) cannot control the quality of products sold by unauthorized sellers, this warranty applies only to Products that were purchased from the Company or the Company’s authorized sellers in the United States, unless otherwise prohibited by law. Company reserves the right to reject warranty claims for Products purchased from unauthorized sellers, including unauthorized Internet sites.

This warranty does not cover any defects due to normal wear and tear, damage due to misuse, alteration to the product, negligence, damage caused by aftermarket applied coatings, discoloration, or corrosion of finished surfaces. This warranty also does not cover damage resulting from collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap or like products, or rust occurring after installation.

Purchasers of a Product who wish to make a warranty claim based upon an alleged Product defect should email the Company at techs@aeromotiveinc.com the following information: (1) Product subject to the claim, (2) brief description of the alleged defect, (3) date and place of purchase/delivery, (4) proof of purchase (showing when and where the Product was purchased), and (5) pictures or videos of the Product. If you purchased on an online marketplace, please be sure the proof of purchase shows from whom you purchased (this information is available in your order history). In some instances, Company may instruct you to mail the Product to Company for inspection and/or repair; if such instruction is provided, Company will provide you with a prepaid shipping label. You can also contact the Company Monday – Friday, 8AM – 6:30PM CT at (913) 808-2376.

Company will replace or repair a defective Product that is covered by this warranty. This
warranty does not cover the cost of removal or installation. Company will pay for the return shipping of the Product to the purchaser.

There are no warranties which extend beyond those stated herein. ANY IMPLIED
WARRANTIES THAT MAY BE APPLICABLE TO PRODUCTS, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. Some States do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

UNDER NO CIRCUMSTANCES SHALL THE COMPANY BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES BASED UPON BREACH OF THIS LIMITED
WARRANTY, BREACH OF CONTRACT OR STRICT LIABILITY. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

If you have any questions about whether a seller is authorized, please contact us at (913) 808-2376.

This warranty supersedes any warranties stated in product manuals or other written materials.

Effective Date: March 16, 2026

Returns & replacements

Returns:

  • Accepted within 90 days of purchase.
  • Prior authorization required; items must be new and resaleable.
  • Call 913-808-2376 to initiate a return and get an RGA.
  • Ship unused products in original packaging with proof of purchase.
  • You pay return shipping; use a trackable method.
  • Refund excludes initial shipping fees and may include up to a 15% restocking fee.
  • Refunds processed within 5-10 days of return acceptance.

Limits of Responsibility:

  • See Product Warranty page for more info.

Reviews

Direct Drop-In In-Tank Fuel Pump, 99-04 GM Truck

Direct Drop-In In-Tank Fuel Pump, 99-04 GM Truck

Part Number: 18312
Choose your Pump Option:
Regular price $670.37
Sale price $670.37 Regular price

Part Number: 18312
Does This part fit My vehicle?

Assembled custom for you in 3-4 weeks in Kansas

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Product Info

This system is designed to work in trucks equipped with the OEM plastic fuel tanks only; some of the 1999 models may still have a steel tank, which will not fit this Phantom series. The 1999-2004 models with a plastic tank for which this Phantom is designed use a smaller factory opening than the later 2005-2017 models, which have their own series of Phantom drop in kits.

The smaller opening in the 1999-2004 tanks does limit the pump configurations which will fit.  These tanks will accommodate several pump options including; a single 340, a dual 340, and a single 450 pump. Any other combination of more/larger pumps will not physically fit through the factory tank opening.

The Silverado and Sierra tanks have a tank depth of approximately 14.00”, while the other models are shallower with depths around 8.25”. The Phantom systems will accommodate both.

The 2500 truck models can be up to 17.00” deep; the Phantom system will also accommodate this as well.

Not configured for use with the OEM, pulse-modulated-to-pressure, pump control.

Requires installation of return style fuel system including high flow AN style fuel lines, fuel filter and EFI bypass regulator with return line.  Contact Aeromotive Tech Support with any questions and for more information.

This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.

Horsepower Ratings

 


 

Additional information


  • Must be a new body style/plastic tank for the model year 1999



This product is not legal for sale or use on emission-controlled vehicles except when used as a direct replacement part matching OEM specifications.

Installation Instructions

Instruction Manual
18312 Installation Instructions

Download PDF
Instruction Manual
18313 Installation Instructions

Download PDF
Instruction Manual
18314 Installation Instructions

Download PDF

Product warranty

Limited Warranty for Aeromotive Products for the United States of America

Aeromotive, LLC warrant to the original end user purchaser in the United States that the Aeromotive and Waterman Racing Components branded products (“Product(s)”) shall be free from defects in material and workmanship for the warranty durations set forth in the chart below from the date of purchase or delivery, whichever is later.

 Products Warranty Duration
  • Aeromotive marine pumps
2 years
  • All other Aeromotive products
  • Waterman Racing Components products
1 year

 

Because Aeromotive, LLC (collectively, the “Company”) cannot control the quality of products sold by unauthorized sellers, this warranty applies only to Products that were purchased from the Company or the Company’s authorized sellers in the United States, unless otherwise prohibited by law. Company reserves the right to reject warranty claims for Products purchased from unauthorized sellers, including unauthorized Internet sites.

This warranty does not cover any defects due to normal wear and tear, damage due to misuse, alteration to the product, negligence, damage caused by aftermarket applied coatings, discoloration, or corrosion of finished surfaces. This warranty also does not cover damage resulting from collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap or like products, or rust occurring after installation.

Purchasers of a Product who wish to make a warranty claim based upon an alleged Product defect should email the Company at techs@aeromotiveinc.com the following information: (1) Product subject to the claim, (2) brief description of the alleged defect, (3) date and place of purchase/delivery, (4) proof of purchase (showing when and where the Product was purchased), and (5) pictures or videos of the Product. If you purchased on an online marketplace, please be sure the proof of purchase shows from whom you purchased (this information is available in your order history). In some instances, Company may instruct you to mail the Product to Company for inspection and/or repair; if such instruction is provided, Company will provide you with a prepaid shipping label. You can also contact the Company Monday – Friday, 8AM – 6:30PM CT at (913) 808-2376.

Company will replace or repair a defective Product that is covered by this warranty. This
warranty does not cover the cost of removal or installation. Company will pay for the return shipping of the Product to the purchaser.

There are no warranties which extend beyond those stated herein. ANY IMPLIED
WARRANTIES THAT MAY BE APPLICABLE TO PRODUCTS, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. Some States do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

UNDER NO CIRCUMSTANCES SHALL THE COMPANY BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES BASED UPON BREACH OF THIS LIMITED
WARRANTY, BREACH OF CONTRACT OR STRICT LIABILITY. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

If you have any questions about whether a seller is authorized, please contact us at (913) 808-2376.

This warranty supersedes any warranties stated in product manuals or other written materials.

Effective Date: March 16, 2026

Returns & replacements

Returns:

  • Accepted within 90 days of purchase.
  • Prior authorization required; items must be new and resaleable.
  • Call 913-808-2376 to initiate a return and get an RGA.
  • Ship unused products in original packaging with proof of purchase.
  • You pay return shipping; use a trackable method.
  • Refund excludes initial shipping fees and may include up to a 15% restocking fee.
  • Refunds processed within 5-10 days of return acceptance.

Limits of Responsibility:

  • See Product Warranty page for more info.

Reviews

Direct Drop-In In-Tank Fuel Pump, 99-04 GM Truck
Direct Drop-In In-Tank Fuel Pump, 99-04 GM Truck
Pump Option:
340 lph
Regular price $670.37
Sale price $670.37 Regular price
Year / Make / Model 1999-2004 Chevrolet Silverado 1500
Engine Type V8
Engine Size(s) Liters: 4.8, 5.3, 6.0
Cubic Inches: 294, 325, 364

Year / Make / Model 1999-2004 Chevrolet Silverado 2500
Engine Type V8
Engine Size(s) Liters: 5.3, 5.7, 6.0
Cubic Inches: 325, 350, 364

Year / Make / Model 1999-2004 GMC Sierra 1500
Engine Type V8
Engine Size(s) Liters: 4.8, 5.3, 6.0
Cubic Inches: 294, 325, 364

Year / Make / Model 1999-2004 GMC Sierra 2500
Engine Type V8
Engine Size(s) Liters: 5.3, 6.0
Cubic Inches: 325, 364

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