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Why is there no fuel to the fuel pump on my 1976 GMC 3/4 t Sierra 25 with S3 tank/ 2switch fuel delivery system and cruise control.

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  • Cars & Trucks Master
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Hole in tank
clogged filter
gas tank empty
clogged fuel line
wrong tank selected
hole in fuel line
tank clogged with rust Why is there no fuel to the fuel pump on my 1976 - 25322561-21syibu3fgwpdxocjnkpw0ib-5-0.jpg

Posted on Dec 15, 2014

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6ya6ya
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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: 1997 gmc sierra p/u 5.0l 2wd needs fuel pump

NO dont drop tank, you will be sorry, take bed off, only like 6 or 8 bolts, and you will have more room to work, and its a pain in the *** to undo the lines and drop the tank, you cant get in there to do it, but just basic tools nothing special, be sure and try not to make any sparks while takein off that ring to get the pump out, and put an ac delco pump on there

Posted on Feb 11, 2009

  • 1 Answer

SOURCE: 94 GMC truck diesel starts,runs and then dies and will not start

I have the same problem and have trouble codes 35 and 36. I found out that there is a computer module that needs replaced as it sits low in a valley and gets hot and seperates. I am reseaching about the a/m fix that installs the new module away from heat.

Posted on Mar 12, 2009

mechanicm639
  • 253 Answers

SOURCE: Fuel problem 2002 GMC Sierra 1500

Really by the way you describe it you need to check the fuel pressure. There is a valve on the fuel rail for testing it. You will need a fuel pressure gauge. It should have 55 to 65 psi. It will not run on less than 50 psi. If you have less then it will be your pump. Good Luck

Posted on May 26, 2009

  • 10 Answers

SOURCE: fuel pump fuse located on 1997 gmc sierra

The fuse is actually a Relay Switch and its located in the Fuse Relay Center on the driverside of the engine compartment. The Black Box is labled Fuse Relay Center, the diagram on the cap displays which Relay is the Fuel Pump relay...the Relay switch is usually $8-$15 depending on where you shop

Posted on Jul 28, 2009

  • 432 Answers

SOURCE: 1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control

May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.

Posted on Feb 05, 2010

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I have 2008 GMC sierra 5.3 L with a new fuel pump. And no power to the pump. Any ideas where to look?


Fuel Pump Flow Control Module (FPCM) - LMF
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a 25 KHZ PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal. Maximum current supplied to the fuel pump is 15 amps. A liquid fuel pressure sensor provides fuel pressure feedback to the FPCM.
Electronic Returnless Fuel System (ERFS) - LMF
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure vent valve within the fuel tank provides an added measure of fuel pump flow control module (FPCM). Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control.

Fuel Pump Flow Control Module (Gas except LU3/LMG/LY6/LC9)
Mounted to the rear frame, near the spare tire mount
Wheels/Vehicle Underbody Component Views
Component Connector End Views
Fuel Pump Relay - Secondary (Gas with LY6)
On the fuse block - underhood bracket

DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
DTC P0192: Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage
DTC P0193: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage
DTC P0230: Fuel Pump Relay Control Circuit
The engine control module (ECM) sends the fuel enable signal to the fuel pump control module (FPCM). The control module monitors the voltage on the fuel pump relay control circuit. If the control module detects an incorrect voltage on the fuel pump relay control circuit, a fuel pump relay control DTC sets.
The control module monitors the voltage on the fuel pump relay control circuit. If the control module detects an incorrect voltage on the fuel pump relay control circuit, a fuel pump relay control DTC sets.
DTC P0231: Fuel Pump Control Circuit Low Voltage
DTC P0232: Fuel Pump Control Circuit High Voltage
DTC P023F: Fuel Pump Control Circuit
DTC P025A: Fuel Pump Control Module Enable Circuit

Your best bet , take it to a qualified repair shop , dealer .

Mar 25, 2017 | GMC Cars & Trucks

1 Answer

02 seirra Cruze control not working the switch has been replaced so the wipers n everything works but not the Cruze?i checked the fuse already also.


fuel gauge in tank is a common problem for GMC truck

fuel gauge have nothing to do with the cruise control ,, look if cruise module is hook up to trottle body. and with scanner read data of cruise set.resume and switch on/off function.

hope it helps

Oct 06, 2014 | 2002 GMC Sierra

1 Answer

Where is the fuel filter on 2007 gmc 1500 sierra


It does not have a user-serviceable fuel filter. In 2004 when GM went to what is called a "returnless" fuel system, they incorporated the fuel filter into the in-tank fuel pump. That means from 2004 to present, the only way to replace the fuel filter is to replace the entire fuel pump.

Sep 03, 2013 | 2007 GMC Sierra 2500HD

1 Answer

Where is the fuel pressure sensor located on 2000 GMC Sierra p/up 5.3


They didn't have a fuel pressure sensor in 2000.... are you referring to the fuel tank pressure sensor? That sensor measures the vacuum/pressure in the fuel tank and is related to evaporative emission control. That sensor is externally located directly on top of the fuel pump on top of the fuel tank. It has a 3-wire connector plugged into it.

Sep 01, 2013 | 2000 GMC Sierra

1 Answer

How to replace fuel pump on 2001 gmc pickup 3/4


the fuel pump is inside the fuel tank. some techs just lower the fuel tank down, others remove the bed. personaly dropping the tank is harder, but lifting off the bed requires about 4 strong people.

Jan 07, 2010 | 2001 GMC Sierra 2500HD

2 Answers

Replaceing fuel pump on gmc sierra


pull the bed off or drop the gas tank

Nov 24, 2009 | 2001 GMC Sierra 1500HD

1 Answer

99 GMC Sierra turns off while in route.


SOUND LIKE FUEL PUMP WEAK OR FUEL TANK FULL OF SEDIMENT.CHECK FUEL PRESSURE.IT SHOULD BE 9 - 13 PSI FOR TBI FUEL INJECTION SYSTEM. 55 - 61 PSI FOR MULTIPORT FUEL INJECTION SYSTEM.IF FUEL PRESSURE IS LOW REPLACE FUEL FILTER FIRST.IF THAT DONT HELP.FUEL PUMP BAD.

Aug 15, 2009 | 1993 GMC Sierra

2 Answers

Changed fuel pump on 99 gmc sierra and has gone out again in less than 2 months, any suggestions what could be causing it?


Did you change the fuel filter? A partially clogged fuel filter will burn up a brand new pump. Otherwise I would suspect you just got a brand new bad fuel pump. Has happened to me twice, so it is possible. Some parts I pay more for to get the OEM brand. Fuel pumps, water pumps, heater core, etc. Any hard to replace part, I buy from the dealer or from a parts store that sells the OEM brand.

Aug 03, 2009 | 1999 GMC Sierra

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