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michael, ASE Certified Technician
Category: GM
Satisfied Customers: 667
Experience:  over 18 years GM exp.' Master ASE tech, Adv. Level Driveability ASE, Alt. Fuel ASE
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GMC 1999 1 ton dully 4x4 flat bed truck. 7.4 liter gas engine.

Customer Question

GMC 1999 1 ton dully 4x4 flat bed truck. 7.4 liter gas engine. Problem is the transfer pump is not working. AC Delco 15754298 was put in new 6 weeks ago and has now failed. Where is the pump getting its power from?
Bud XXX-XXX-XXXX [email protected]
Submitted: 7 years ago.
Category: GM
Expert:  michael replied 7 years ago.

hello. there is an updated control module for this pump. below is an excerpt from a service bulletin that could explain the repeated pump failure that your having. i would recommend in addition to installing a new pump... that you install the updated control module. also, below is the wiring schematic for the fuel system.


#01-06-04-037B: Fuel Transfer Pump Inoperative (Replace Fuel Transfer Module) - (Oct 16, 2001)

Subject: Fuel Transfer Pump Inoperative (Replace Fuel Transfer Module)

Models: 1990-2001 Chevrolet and GMC 6-7H C-Series Conventional Medium Duty Models

With Gas Engine (VINs E, D, B, M, P -- RPOs L18, LP4, L21, LRO, LSO)

1997-2001 Chevrolet and GMC 6-7F T-Series Medium Duty Tilt Cab Models

With Isuzu Diesel Engine (VIN 3 -- RPO LG4) or Caterpillar® Diesel Engine (VIN C -- RPO LG5)

1996-2001 Chevrolet and GMC C/K 3500 (1 Ton) Models

With Gas Engine (VINs G, J, R -- RPOs L18, L29, L31) or Diesel Engine (VIN F -- RPO L65)

and Dual Fuel Tanks


This bulletin is being revised to update part usage for C/K 3500 Models in the Parts information. Please discard Corporate Bulletin Number 01-06-04-037A (Section 06 -- Engine/Propulsion System).


Some customers may comment on inoperative secondary fuel tank transfer pumps. In some instances, customers may experience multiple failures of the service replacement pumps.

This condition may be caused by the "Four Minute Final Pump Out" feature of the fuel level control module. This feature can command the transfer pump to on when there is no fuel in the secondary tank.

This command occurs with every ignition cycle for a period of four minutes. These transfer pumps can overheat and become inoperative when they are run dry.

Customers that never add fuel to the secondary tank can further compound this issue. In these cases, the secondary pump would become inoperative in a very short period of time.

Three new transfer pump modules have been released to correct this condition. The new module curtails the "Four Minute Final Pump Out" feature. When the sender in the secondary tank drops to a resistance reading of 2 ohms, the pump-out feature is disabled. At resistance readings greater than 2 ohms, the pump-out feature will continue to function. However, under this condition there should be enough fuel in the tank to prevent pump failure. Replace the fuel transfer module using the procedures and part numbers listed below.


15061010 Fuel Pump Transfer Control Module.



Object Number: 196407  Size: MF



Customer: replied 7 years ago.

Mike, I would like a picture of the pump and location of 15061010 fuel pump transfer control module.

Thanks, Bud,

Where the pump?. This diagram doesn't tell me what I need to know.

Expert:  michael replied 7 years ago.

hello. below is a pic for the transfer module and the transfer pump location.


the transfer module is mounted on the inside of the left frame near the transmission crossmember... and the transfer pump is mounted inside the rear tank.





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