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1998 Chevrolet Malibu 54k miles - replaced fuel pump assembly & now some dash warning lights and clock stay on. Any ideas?

Posted by Mark Hoffman on

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Jeff Armer

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  • Chevrolet Master
  • 15,575 Answers

Replacing a fuel pump has nothing to do with instrument cluster lights or the clock staying on. Unless you shorted wires , did you disconnect the negative battery cable before hand ?
The body control module (BCM) performs the following functions:
• A/C compressor request
• A/C cooling fan
• Exterior and interior lighting control
- Daytime running lights (DRL)
- Automatic lighting control
- Fog lamps
- Interior lighting
• Battery rundown
• Chime
• Gauge control
• Instrument cluster indicator control
• Fuel gauge control
• Temperature gauge control
• Theft deterrent
Interpreting all of the driver warnings sent by the control modules on the class 2 serial data line
Sending the information to the instrument cluster in the form of a SPI serial data bus message
The following list of messages are sent by the BCM to the instrument cluster:
• Fuel gauge position
• Temperature gauge position
• Oil pressure
• Low engine coolant
• Check oil
• Volts
• High beam
• Low fuel
• High temperature
• Washer fluid level low
• Door ajar
• Seat belt
Check the fuel level sensor wires , the fuel level sensor is a input to the BCM .

Posted on Apr 21, 2018


5 Related Answers


Gary Queen

  • 85 Answers

SOURCE: 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

Posted on Nov 12, 2008



  • 505 Answers

SOURCE: Replace Dash light bulbs on 2004 Malibu Maxx

you need to take the hole dash out and on the back of the speed dash there are little bulbs take them out then replace them

Posted on Dec 30, 2008


Jerry Mace

  • 42 Answers

SOURCE: Need to replace the fuel pump on 2003 Chevrolet Malibu.

Gotta drain that tank first, take your time and be smart about it. The book says to use a hand operated pump connected to the pressure return line at the tank; but we all know you're going to siphon it. Just don't use a vinyl tube, it holds and conducts static electricity, use rubber fuel hose. Disconnect, drain & drop. Replace the pump assembly and reverse the procedure. Look for upwards of 500-1100 dollars from garages/dealers. The part itself is just under $300. Reliable used parts are available at the yard or internet for about $50 or less.

Posted on Mar 19, 2009



  • 85239 Answers


this is the low tire pressure warning

Posted on Mar 12, 2010

Testimonial: "This was very helpful I will go pump up tyers maybe get someone at the garage to do it..thank you for your advice"


  • 3640 Answers

SOURCE: check dab error for 2005 chevrolet malibu

DAB stands for digital audio band.

Posted on Mar 15, 2010

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