Question about 1999 Pontiac Grand Am

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Have a 99 grand am.disconnected battery to ch a nge fuel sending unit .assembled back together now can't start car and security light on steady. Help

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Sounds like you got a brain error in it and if it has a security system start there for sure, get a diagnostic test. Some parts stores will offer it for not to much money. And it will tell all of whats wrong with it if there is anything besides a security glitch. Good luck

Posted on Apr 21, 2015

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Engine cranks, won't start. Three days later, it starts???

probaly a fuel pump its common for vehicles to do that the best thing to do next is a fuel pressure check to verifiy its the pump

Posted on Apr 15, 2009

  • 72 Answers

SOURCE: 99 Grand am Security light comes on every time and car wont start

you cant disable the unit.. it is integral with the engines computer.. turn the key to the on position and leave it for 10 minutes.. the security light should stop flashing in 10 minutes or so , when it does , start the vehicle.. if it is a recurring problem , replace the ignition lock cylinder as it is a common problem with these cars.

Posted on Jul 29, 2009

  • 1 Answer

SOURCE: 99 chevy cavalier theft system light on steady, car wont crank.

My 2000 cavalier has done this for 6 months. You take your key out then open your door, wait ten minutes and the system resets itself and the car will start-annoying you bet!!!

Posted on Aug 21, 2009

  • 1 Answer

SOURCE: 99 Bonneville wont start, Security light on

how to get the security light off and to get my car off security so it will stay running

Posted on Apr 18, 2010

  • 1 Answer

SOURCE: Pontiac Grand Prix 94, will not start. Security lighty

try a new ignition switch.

Posted on Apr 23, 2010

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1 Answer

How to install a fuel pump in a 1989 Mercury Grand


Should take you the better part of a weekend afternoon:
  1. Depressurize the fuel system, either by removing the fuse for the fuel pump or by disconnecting the plug from the Inertia Switch, then start the vehicle and let it run until it dies (usually it will run for less than three seconds before the fuel pressure drops to 0). I also recommend draining as much of the fuel from the tank as possible, and use that fuel in your lawn equipment (do not put it back into the vehicle).
  2. Disconnect the negative battery connector.
  3. Support the fuel tank with a hydraulic jack, and remove the two nuts securing the fuel tank straps. Once the tank is loose, lower the tank carefully.
  4. When they are visible, remove the fuel line, the return line, the vapor line, and the electrical connectors to the fuel level sending unit and the fuel pump.
  5. Remove the tank completely once all connections are disconnected.
  6. DRAIN REMAINING FUEL AND DEBRIS FROM TANK AND DISPOSE OF SAFELY (do not reuse).
  7. Remove retaining ring from the "hanger assembly," and remove the fuel pump hanger assembly from the tank. The fuel pump can then be removed from the fuel assembly.
  8. Once you remove the hanger assembly, look at the intake screen (also known as the "fuel sock). If it has significant rust in it, DO NOT WASTE TIME - REPLACE THE ENTIRE FUEL TANK (you can find them online for about $110). Don't waste time replacing fuel system components if your fuel tank is rusted!!
  9. BE SURE TO REPLACE THE INTAKE STRAINER (fuel sock), even if you do nothing else.
  10. Reverse procedure to reassemble. You may need to get a new "locking ring" for the hanger assembly (cheap)
  11. Reconnect everything, and hoist the tank back into place. Use NEW FUEL (start with about 5 gallons).
  12. Reconnect the negative battery cable.
  13. To repressurize the fuel system, turn the key from OFF to ON, count to five, turn the key back OFF, count to five again, then immediately do the same thing three more times. The fourth time, you should be able to START the vehicle.

Sep 05, 2014 | Cars & Trucks

1 Answer

My digital gas gage reads full all the time I have to go by my miles and sometimes that don't work and I run out of gas..how do I fix my problem


This is a common problem and to correct this problem will require the replacement of the fuel sending unit. The fuel sending unit is inside the fuel tank and has the fuel pump mounted in it. This requires the removal of the gas tank and then the fuel sending unit can be removed from the tank.

REMOVAL AND INSTALLATION Fig. 1: Fuel pump unit 8470h037.gif
  1. Disconnect the negative battery cable.
  2. Relieve fuel system pressure.
  3. Remove fuel filler cap to release fuel tank vapors. Leave cap off until repairs are completed. Gasoline fuel vapors are extremely flammable. Ensure that fuel is stored in a container that can be properly sealed. Never store fuel in an open container. Store container in a safe place away from heat.
  4. Remove fuel tank by performing the following:
    1. Step 1: Drain fuel from the tank into an approved container for storage.
    2. Step 2: Raise and safely support the vehicle.
    3. Step 3: Remove rear stabilizer bar at links, pivot bar downward.
    4. Step 4: Remove hoses and pipes from tank unit.
    5. Step 5: Remove hoses at tank from filler and vent pipe.
    6. Step 6: Disconnect tank unit harness from rear body harness.
    7. Step 7: Support fuel tank and disconnect 2 fuel tank retaining straps.
    8. Step 8: Remove tank from vehicle.
  5. Remove sending unit, gasket and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel tank sending unit.
  6. Pull fuel pump up into attaching hose while pulling outward away from bottom support. Take care to prevent damage to rubber insulator and strainer during removal. After pump assembly is clear of bottom support, pull pump assembly out of rubber connector for removal. To install:
  7. Push fuel pump assembly into attaching hose.
  8. Install fuel tank sending unit and pump assembly into tank assembly. Use new O-ring seal during reassembly.
  9. Install cam lock over assembly and lock by turning clockwise.
  10. Support tank and position in vehicle. Install tank straps and secure with retaining bolts. Tighten to 25 ft. lbs. (33 Nm).
  11. Connect tank unit harness to body harness.
  12. Connect hoses to filler and vent pipes. Tighten clamps.
  13. Connect hoses and pipes to tank unit.
  14. Connect rear stabilizer bar to links. Tighten bolts to 42 ft. lbs. (58 Nm).
  15. Lower vehicle.
  16. Refill tank and install filler cap.
  17. Connect negative battery cable.
  18. Start engine and check for leaks.

Dec 24, 2010 | 1992 Oldsmobile Toronado

1 Answer

Do i have to drop gas tank to change fuel pump on 99 grand am gt?


Yes. It's not a terribly difficult job though. First back the car onto some ramps and set the parking brake firmly. Disconnect the electrical connector for the fuel pump / fuel level sending unit. You will need to loosen the hose clamps around the fuel filler neck hose and the vent hose and remove the rubber hoses at one (either) end. There will be some 'quick disconnect' fuel lines. To disconnect these, you need to squeeze the two white plastic inside pieces together and pull them apart (it will be very obvious when you see them). Put a hydraulic floor jack under the gas tank with a piece of wood on top of it to distribute the weight of the tank over a larger area. Then you can unscrew the two straps that hold the fuel tank up and gently and slowly lower it down. Once it is down, there is a lock ring on the top of the tank that holds the fuel pump / fuel level sending unit assembly in the tank. Use a brass punch to loosen the lock ring to avoid sparks. Make sure to replace the fuel strainer and any O rings when you do the pump. Installation is (as always) the reverse of removal. Also, remember to drain any remaining fuel from the tank while you have it removed. This will make installation a lot easier.

Dec 07, 2010 | 1999 Pontiac Grand Am GT

1 Answer

Can I access the fuelpump through the trunk on a 94 concours c4.6


According to the instructions, it is not accessible through the trunk on the 94 Cadillac --- REMOVAL AND INSTALLATION Fig. 1: Fuel pump unit 8470h037.gif
  1. Disconnect the negative battery cable.
  2. Relieve fuel system pressure.
  3. Remove fuel filler cap to release fuel tank vapors. Leave cap off until repairs are completed. Gasoline fuel vapors are extremely flammable. Ensure that fuel is stored in a container that can be properly sealed. Never store fuel in an open container. Store container in a safe place away from heat.
  4. Remove fuel tank by performing the following:
    1. Step 1: Drain fuel from the tank into an approved container for storage.
    2. Step 2: Raise and safely support the vehicle.
    3. Step 3: Remove rear stabilizer bar at links, pivot bar downward.
    4. Step 4: Remove hoses and pipes from tank unit.
    5. Step 5: Remove hoses at tank from filler and vent pipe.
    6. Step 6: Disconnect tank unit harness from rear body harness.
    7. Step 7: Support fuel tank and disconnect 2 fuel tank retaining straps.
    8. Step 8: Remove tank from vehicle.
  5. Remove sending unit, gasket and pump assembly by turning cam lock ring counterclockwise. Lift assembly from fuel tank and remove fuel pump from fuel tank sending unit.
  6. Pull fuel pump up into attaching hose while pulling outward away from bottom support. Take care to prevent damage to rubber insulator and strainer during removal. After pump assembly is clear of bottom support, pull pump assembly out of rubber connector for removal. To install:
  7. Push fuel pump assembly into attaching hose.
  8. Install fuel tank sending unit and pump assembly into tank assembly. Use new O-ring seal during reassembly.
  9. Install cam lock over assembly and lock by turning clockwise.
  10. Support tank and position in vehicle. Install tank straps and secure with retaining bolts. Tighten to 25 ft. lbs. (33 Nm).
  11. Connect tank unit harness to body harness.
  12. Connect hoses to filler and vent pipes. Tighten clamps.
  13. Connect hoses and pipes to tank unit.
  14. Connect rear stabilizer bar to links. Tighten bolts to 42 ft. lbs. (58 Nm).
  15. Lower vehicle.
  16. Refill tank and install filler cap.
  17. Connect negative battery cable.
  18. Start engine and check for leaks.
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Aug 26, 2010 | Cadillac Escalade ESV Cars & Trucks

2 Answers

I am getting no diesel into my fuel filter is their a electric pump in my tank or is the fuel pump part of the injector pump


Fuel Pump REMOVAL & INSTALLATION Navajo and B Series Pick-up Models NOTE: To gain access to the fuel pump, it is necessary to remove the fuel tank.
  1. Depressurize the fuel system and remove the fuel tank from the vehicle.
  2. Remove any dirt that has accumulated around the fuel pump attaching flange, to prevent it from entering the tank during service.
  3. Turn the fuel pump locking ring counterclockwise using a locking ring removal tool and remove the locking ring.
  4. Remove the fuel pump and bracket assembly.
  5. Remove the seal gasket and discard it. To install:
  6. Put a light coating of heavy grease on a new seal ring to hold it in place during assembly. Install it in fuel tank ring groove. Fig. 1: Fuel pump and sending unit used on the B Series Pick-up regular cab 89685g02.gif
    Fig. 2: Fuel pump and sending unit used on the B Series Cab Plus Pick-up 89685g03.gif
    Fig. 3: Fuel pump and sending unit used on the Navajo 89685g04.gif

  7. Insert the fuel pump assembly into the fuel tank, then secure it in place with the locking ring. Tighten the ring until secure.
  8. Install the tank in the vehicle.
  9. Install a minimum of 10 gallons of fuel and check for leaks.
  10. Install a pressure gauge on the throttle body valve and turn the ignition ON for 3 seconds. Turn the key OFF, then repeat the key cycle five to ten times until the pressure gauge shows at least 30 psi. Reinspect for leaks at the fittings.
  11. Remove the pressure gauge. Start the engine and check for fuel leaks.
MPV Models
  1. Relieve the fuel system pressure and disconnect the negative battery cable.
  2. Remove the rear seat and lift up the rear floormat. Remove the fuel pump cover.
  3. Disconnect the sending unit/fuel pump assembly electrical connector and the fuel lines.
  4. Remove any dirt that has accumulated around the sending unit/fuel pump assembly so it will not enter the fuel tank during removal and installation.
  5. Remove the attaching screws and remove the sending unit/fuel pump assembly.
  6. If necessary, disconnect the electrical connectors and the fuel hose and remove the pump from the sending unit assembly.
  7. Installation is the reverse of the removal procedure. Be sure to install a new seal rubber gasket. Fig. 4: Remove the rear seat and floormat to service the fuel pump 90975g06.gif
    Fig. 5: Removing the fuel pump assembly 90975g07.gif
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Aug 17, 2010 | 1995 Mazda MPV

1 Answer

How to change a fuel pump on a 2005 Nissan


Nissan Car Altima & Sentra 1999-06 Repair Guide
Fuel Pump - Removal & Installation
  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Relieve the pressure from the fuel system.
  3. Remove or disconnect the following:
    NOTE When the fuel sending unit needs to be removed, pull the tab upwards. The tab is located on the sending unit, opposite the end of the float. After the tab is pulled, the sending unit will lift straight out of the tank bracket.
    Negative battery cable Rear seat and the access cover Fuel pump electrical connector Fuel lines from the fuel pump assembly Locking ring Fuel gauge assembly Fuel tube and connector from the fuel gauge
    Fuel pump by pinching the 2 locking tabs together. Lift the fuel pump assembly straight upward and out of fuel tank. O-ring and discard
  4. Place a clean rag in the hole to keep out dirt.
To install:
  1. Remove the rag
  2. Install or connect the following:
    NOTE Verify that the mark on the fuel tank and the components are aligned when installing the pump and fuel gauge sending unit.
    New O-ring and fuel pump Electrical connection and fuel tube to the fuel gauge sending unit Fuel sending unit into the tank
  3. If equipped with a threaded lock ring torque the ring to 22-26 ft. lbs. (30-35 Nm). If equipped with a lock ring held by six retaining screws, torque the screws to 18-22 inch lbs. (2-2.5 Nm).
    Fuel lines and fuel pump electrical connector. Always install new clamps on the fuel lines. Negative battery cable
  4. Start the engine, check for leaks and repair if necessary.
    Fuel pump access cover Rear seat

The fuel pump is located in the fuel tank on all vehicles. In-tank fuel pumps are accessible by lifting up the rear seat to gain access to the inspection cover.
  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Relieve the fuel system pressure.
  3. Remove or disconnect the following:
    Negative battery cable Rear seat from the vehicle Inspection cover that is located under the rear seat Inlet and outlet fuel lines from the fuel pump assembly Fuel pump and gauge wiring connections 6 mounting bolts that secure the fuel pump assembly to the top of the fuel tank
  4. Raise up the fuel pump assembly and detach the fuel tubes and connector.
    Fuel gauge assembly Fuel pump with the fuel chamber
  5. Pull up the front of the fuel pump chamber and slide the chamber forward.
    Fuel pump from the chamber O-ring seal or gasket
To install:
  1. Install or connect the following:
    Fuel pump to the fuel pump chamber and slide chamber rearward Fuel pump with the fuel pump chamber Fuel gauge assembly using a new O-ring Fuel tubes and connector. Use new hoses and clamps. 6 mounting bolts to the top of the fuel gauge unit and torque the bolts to 18-22 inch lbs. (2-2.5 Nm) Fuel pump and gauge wiring connections New inlet and outlet fuel lines to the fuel pump assembly Negative battery cable
  2. Start the vehicle, check for leaks and repair if necessary. Inspection cover and the rear seat

Hope helps (remember comment and rates this).

Jul 07, 2010 | 2005 Nissan Sentra

2 Answers

How to change fuel pump in 2001 pontiac grand prix


In the trunk behind the seat, pull back the carpet. there is an access panel in floor. take that off, and you have direct access to the pump assembly, disconect the three hoses and the pigtail, take off the lock ring and pull it strait up. you can only buy the whole assembly so its just swapping them out and putting everything back together.

Apr 25, 2010 | 2001 Pontiac Grand Prix

2 Answers

1996 Pontiac Grand Am will start but won't stay running


Either security chip in the ignition switch has failed or the security system has triggered. Try turning the key on and let the security light flash till it goes on steady. If it does not start, change ignition lock.

Aug 14, 2009 | 1996 Pontiac Grand Am

1 Answer

How do you replace a fuel pump on a 1999 chevy blazer


Relieve the fuel system pressure if any. Wrap a shop rag around the Schrader valve located on the inlet fuel line of the fuel rail, right before the first fuel injector-the valve is similar to an air valve on a bicycle tire; then depress the small stem inside the valve using a small standard screwdriver to free the fuel form the line.
  1. Disconnect the black, negative battery cable; raise the rear of the vehicle using a floor jack and safely support it on 2 jack stands.
  2. Working from underneath the vehicle, disconnect the filler hose form the tank by removing the hose clamp using a Phillips screwdriver or ratchet and socket; then remove the Fuel tank shield using a ratchet and socket. Support the fuel tank with the floor jack and remove the tank mounting straps using a ratchet, ratchet extension and socket.

Lower the tank carefully, just enough to disconnect the two fuel hoses and vapor hose from the sending unit/pump assembly on top of the fuel tank. Press the lock tabs on the hoses connectors and pull the hoses form the assembly fittings; unplug the fuel pump electrical connector and lower the tank to the floor.

Remove the lock ring from the sending unit/pump assembly using a drift punch and hammer. Carefully rotate the lock ring tabs counterclockwise with the drift punch and hammer until the ring is free from the assembly. Lift the sending unit/pump assembly off the tank and out of the vehicle.

Install the new pump on the sending unit/pump assembly. Make sure the pump filter is in a horizontal position and does not interfere with the travel movement of the sending unit float arm; then install the sending unit/pump assembly into the tank using a new O-ring between the assembly and the tank.

Secure the assembly in place by turning the locking ring clockwise using the drift punch and hammer; then raise the fuel tank enough to connect the fuel and vapor hoses and plug the pump electrical connector.

Raise the fuel tank, install the tank mounting straps and tank shield; connect the filler hose to the tank and lower the vehicle; install the fuel pump relay and connect the black, negative battery cable. Start the engine and check for fuel leaks.

Good luck and hope this helps. It's about a 4 hour job from start to finish, also if your going to go through all that work. Buy a wire harness from the fuel sending unit to the frame. It's only around $15.00 and who knows, it may just be a bad wire harness that may be the problem.

May 02, 2009 | 1999 Chevrolet Blazer

1 Answer

Fuel pump 1998 olds bravada


  1. Properly drain the fuel tank, then disconnect the negative battery cable.
  2. If not done already, raise and support the rear of the truck safely using jackstands.
  3. If equipped on late-model vehicles, loosen and remove the tank plastic shield.
  4. Loosen the retaining clamp and disconnect the tank filler hose from the tank neck.
If fuel and vapor hoses or pump/sending unit wiring can be accessed at this time, they may be tagged and disconnected. If not, wait for the retaining straps to be loosened and lower the tank slightly for access.
  1. Tag and disconnect and accessible wiring or hoses from the top of the fuel tank.
  2. Have and assistant support the fuel tank, then remove the fuel tank-to-vehicle straps and, if equipped, the isolation strips. If no assistant is available, position a floor jack to support the tank while the straps are removed.
  3. Lower the tank slightly, then remove the sending unit or sending unit/pump wires, hoses and ground strap. Be sure to label all connections to ease installation.
  4. Carefully lower the fuel tank from the vehicle and store in a safe place.
To install:
  1. Raise the tank partially into position in the vehicle. If you are working without an assistant, you may wish to loosely install one of the retaining straps and use a floor jack to support the tank at an angle so there is access to the sending unit or sending unit/pump assembly (as applicable).
  2. Connect the fuel/vapor hoses and wiring to the top of the fuel tank, as tagged during removal.
  3. Carefully raise the fuel tank so it is fully into position and loosely secure the retaining straps. Make sure the wires and hoses are not pinched or damaged when raising the tank. Also, be sure that the isolation strips (if used) are positioned between the retaining straps and the fuel tank.
  4. It may be easier to connect the fuel filler hose to the tank neck at this time. If desired, connect the hose and secure the clamp.
  5. Tighten the fuel tank retaining strap fasteners to specification. Tighten the strap nuts to 33 ft. lbs. (45 Nm).
  6. If not done earlier, connect the tank filler hose to the tank neck and secure using the clamp.
  7. If equipped, install and secure the tank plastic shield.
  8. Remove the jackstands and carefully lower the rear of the truck.
  9. Refill the fuel tank and install the filler cap, then check for leaks.
  10. Connect the negative battery cable.
Equipped With Shield Package
  1. Properly drain the fuel tank, then disconnect the negative battery cable.
  2. Raise and support the rear of the truck safely using jackstands.
  3. Remove the shield forward support and bracket.
  4. While supporting the shield and tank assembly with the help of both an assistant and a floor jack, remove the remaining bolts holding the assembly to the frame, then lower it sufficiently for access to the hoses and wires.
  5. Tag and disengage the hoses and wires from the sending unit assembly.
  6. Carefully lower the fuel tank and shield from the vehicle, then if necessary for service or replacement, separate the tank from the shield.
To install:
  1. If separated, install the tank to the shield.
  2. Carefully raise the tank and shield assembly partially into position with the help of an assistant and a floor jack.
  3. Connect the wiring and hoses to the sending unit assembly, as tagged during removal.
  4. Raise the tank and shield assembly fully into position, then secure to the frame using the lower retaining bolts.
  5. Install the shield forward support bracket.
  6. Remove the jackstands and carefully lower the rear of the truck.
  7. Refill the fuel tank and install the filler cap, then check for leaks.
  8. Connect the negative battery cable.
  any question I can send some diagrams

Sep 14, 2008 | 1998 Oldsmobile Bravada

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