Question about 2003 Buick Century

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No gear indicator, replaced cluster, odometer and PRNDL lights on, but no indicator light for gears. ????? Swapped out instrument cluster, gears displayed on other vehicle, (both instrument clusters)

Tried 3 different instrument clusters, all display gear indicator on other vehicle, none display on this 2003. What else should I look for?

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  • bhl198330
    bhl198330 Nov 06, 2012

    It has nothing to do with the instrument cluster - same cluster works fine in other vehicles. Problem is cannot see which gear car is in on thei 2003 century. Can't see any issues with wires

  • bhl198330
    bhl198330 Nov 06, 2012

    instrument cluster lights up displaying odometer and PRNDL -no orange highlight for gear

  • bhl198330
    bhl198330 Nov 06, 2012

    same instrument clusters show gear when installed in other buick century



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I had a similar situation. No odometer, fuel gage, etc. Turned out to be loose connection in the relay box that is closest to the battery cables. I opened the box and reinserted the connections. It happened again and I took a hammer and gave the black box a whack and it started working again. I found that when the car is running, my wife behind the steering wheel an me under the hood, that when I manipulate the box she hears a click under the dash and the symptoms appear and disappear. That is where I would direct my attention. I understand it is a common problem on this model from a Buick mechanic.

Posted on Nov 27, 2012


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Posted on Jan 02, 2017

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SOURCE: '98 Buick Century has no odometer/gear selector display

The resisters on the back of the odometer fell off. they can be re solder if you can find them. That is what happened to mine. i stumbled on video directions on youtube. just pull out you cluster. there are 4 resisters on ther right top side of the of the PC board. if there still there they will be blackend and burned. just roll your finger on them and if they fall off easy there bad. you can buy replacement resistors for like $3 and same your self a $100 to fix or worse. buying a new one. ther resistors i used were 1/2 watt 150Ohm 5% tolerance resistors. and they can be bought from any raido shack. i hope this helps.

Posted on Jul 26, 2009

  • 1990 Answers

SOURCE: instrument cluster panel

Not a Fuse. There are Small Bulbs on the Back of the Guage Cluster that Burn out Occassionally. You will need to Disassemle the Dash and Remove the Guage Cluster to get to these Mini-Bulbs for Replacement. Please Rate my Solution, I need all the Help that I can Get! Thanks!

Posted on Jan 29, 2009

  • 3113 Answers

SOURCE: light showing odometer and what gear transmission

The cluster will have to be sent out for repairs or exchange by a dealer or see Model Electronics.

Posted on Jul 08, 2009

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Park ave 2000 odometer and prndl not visible resodered the resistors no improvement noted

Did you perform the Instrument Cluster Diagnostic System Check?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Instrument Cluster
Turn OFF the ignition.
Install a scan tool.
Start the engine.
Place the gear shift lever in the following gears:
Observe the Transmission Range parameter in the powertrain control module (PCM) data display.
Does the scan tool indicate that the Transmission Range parameter is the same as the PRNDL display for all gears?
YES - Go to Powertrain On Board Diagnostic (OBD) System Check Engine Controls - 3.8L
NO - Go to Step 3
Replace the instrument cluster. Refer to Instrument Cluster Replacement .
Did you complete the replacement?

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2003 Chevy Avalanche won't start (incorrect gear indicator)

PRNDL Display
The instrument panel cluster (IPC) displays the selected gear position as determined by the powertrain control module (PCM). The IPC receives a class 2 message from the PCM indicating the gear position. The PRNDL display blanks if:
• The PCM detects a malfunction in the transmission range switch circuit.
• The IPC receives a class 2 message indicating the park position and the column park switch indicates a position other than park, open input.
• The IPC detects a loss of class 2 communications with the PCM.

Could be the transmission range sensor . Testing would need to be done , hooking up a scan tool ! Doing electrical testing etc...

Jul 06, 2017 | 2003 Chevrolet Avalanche

1 Answer

The instrument cluster has been rebuilt, but still doesn't work on a 2000 Chevy Suburban 5.3. Fuses OK What else?

With the instrument cluster pulled ,but still connected to electrical connector , Check B+ voltage an ground's . Loaded circuit testing , do you know what that is ? Video's on youtube .An do you know where the gauges get there info. from ? The instrument cluster is hooked to the class 2 serial data network , this is a communication network for the control modules . PCM / ECM - engine computer , BCM - body control module , SRS , air bag module , ABS , etc.... They all share info. on this network .
Fuel Gauge
The fuel gauge is an analog device that is located in the instrument cluster. The instrument cluster operates the fuel gauge by the class 2 serial data messages from the VCM/PCM. The fuel gauge indicates the quantity of fuel in the tank when the ignition switch is in the RUN position. When the ignition switch is turned to the OFF, LOCK, START, or ACC position, the pointer may come to rest at any position.
The VCM/PCM measures voltage from a variable resistor inside the fuel tank that is controlled by a float. When the fuel tank is full and the ignition switch is in the RUN position, the resistance is high. The VCM/PCM interprets this signal and sends a message to the instrument cluster indicating the percentage of fuel in the tank over the class 2 serial data line. The fuel gauge indicator then moves to the maximum position or FULL on the gauge face. When the fuel tank is empty, resistance is low. The VCM/PCM interprets this signal and sends a class 2 serial data message to the instrument cluster. The fuel gauge indicator then moves to the minimum position or EMPTY on the gauge face. Failures detected by the PCM/VCM in the fuel gauge signal sends the gauge to EMPTY.

PRNDL Indicator (Park Reverse Neutral Drive Low)
The PRNDL display is a class 2 serial data message to the instrument cluster from the PCM/VCM. The PRNDL display is a vacuum florescent (VF) display which displays the fixed gear position of P, R, N, D, 3, 2, 1 surrounded by a moveable square flag in order to indicate the selected gear position. The position of the moveable square flag is sent to the instrument cluster from the transmission range switch over the class 2 serial data line. The transmission range switch and the neutral safety back up (NSBU) switch operate separately but are incorporated into one part. If the vehicle is equipped with a column shift steering column it will also have a park position switch. The park position switch (if equipped) must also be CLOSED in order for the instrument cluster to display the PARK position. Since the system is entirely electronic, there is not any internal adjustment. The PRNDL display will operate as follows:
• The PRNDL display will display the PARK position when a class 2 serial data message is received from the PCM/VCM indicating the transmission is in the PARK position and for vehicles which have a column shift on the steering column, the park position switch must also be CLOSED (low input).
• The PRNDL display will display a gear position if a class 2 serial data message from the PCM/VCM is received indicating the gear position of the transmission.
• The moveable square flag will not appear on the instrument cluster in order to show no gear was selected when the instrument cluster does not receive a class 2 serial data message from the PCM/VCM within 5 seconds of entering the UNLOCK or the RUN position.
Refer to Engine Controls or Transmission/Transaxle for more information about the PRNDL indicator.

Hooking up a GM tech 2 scan tool an checking for DTC'S - diagnostic trouble code's would be a good first step in the diagnostic procedure .
Data Link Communications Circuit Description
The serial data line is the means by which the microprocessor controlled modules in the vehicle communicate with other control modules and the scan tool.
The control modules on the class 2 data line are as follows:
• Body control module (BCM)
• Instrument cluster (IPC)
• Automatic transfer case (ATC) control module
• Vehicle control module (VCM)
• Powertrain control module (PCM)
• Inflatable restraint sensing and diagnostic module (SDM)
• Electronic Brake Control Module (EBCM)
• Suspension Control Module (SCM)
• HVAC Control Module

Your best bet mite be to take it to a qualified repair shop .

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1 Answer

Gear indicator light delays or does not light up

is it on the dash? the odometer?

your instrument cluster may need repair.
common problem.
check out ebay for "instrument cluster repair"

just do a little searching on ebay

let me know if this helps..

Apr 02, 2011 | 2003 Buick Century

2 Answers

1995 Cougar Odometer/trip-meter inop

Section 13-01: Instrument Cluster—Conventional 1995 Thunderbird, Cougar Workshop Manual REMOVAL AND INSTALLATION Instrument Cluster Removal and Installation
  1. Disconnect battery ground cable (14301) .
  1. Remove screws holding instrument panel reinforcement (017A28) .
  1. Remove screws holding instrument panel lower shield (045G02) .
  1. Remove fasteners holding steering wheel column as outlined in Section 11-04 . Gently lower steering column.
  1. Remove fasteners holding the instrument panel finish panel (044D70) and gently pry off.

  1. Remove four instrument cluster retaining screws. (Do not remove screws from the instrument cluster main lens (10887) and instrument cluster mask (10890) ).
  1. Slide the instrument cluster (10849) to the right of the instrument panel opening and unhook the instrument panel harness from the back of the instrument cluster .
  1. Remove the instrument cluster from the instrument panel (04320) .
Speedometer/Odometer Federal law requires that the odometer in any replacement speedometer (17255) must register the same mileage as that registered in the removed speedometer . Since the speedometer mileage cannot be reset on this unit, affix odometer sticker to driver's door pillar and record original vehicle mileage. Removal
  1. Disconnect battery ground cable (14301) .
  1. Remove the instrument cluster (10849) as outlined.
  1. Remove seven screws retaining the instrument cluster mask (10890) and instrument cluster main lens (10887) .
  1. Remove speedometer assembly.
  1. Position the speedometer assembly to the instrument cluster back plate (10848) and install.
  1. Position the instrument cluster mask and instrument cluster main lens to the instrument cluster back plate and install the seven retaining screws.
  1. Install the instrument cluster as outlined.
  1. Connect battery ground cable and check the operation of the speedometer .
please rate if this helps

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Speedometer not working

I would hold off on trying to buy a new or used instrument cluster unless your sure thats the problem.... your vehicle is equipped with a speed sending unit and that can be faulty ask your self is the other functions of the cluster working? tachometer, fuel, lights etc? then may only be sending unit for speed have it checked out by a pro or follow instructions of troubleshooting section of your repair manual I always try to keep it simple did you check the fuses and relays? then move on from there. If it is sending unit or cluster heres a place I have used for years to get hceap good used and new parts Peach street autorecycling 18003652341 ggod luck and dont forget to rate me if I have helped.

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This requires lamp replacement - and that means pulling the instrument cluster. I have done this on several cars, it has been easier than one may think. Read up or look for YouTube video for your car. Given the age and one has failed, pretty shortly all will statistically - so replace the rest. This repair takes me about 30 minutes - you may want to leave this to a shop mechanic.

Feb 21, 2018 | 2003 Buick Century

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