2004 gmc 2500 pickup inop speedometer

There is no odometer fuse . Does the speedometer work ?

If speedometer works , you need a new instrument cluster . Pinpoint Test E: The Speedometer/Odometer Is Inoperative Normal Operation Vehicle speed information is sent to the instrument cluster from the anti-lock brake system (ABS) module over the communication network.

Possible Causes
• ABS module
• Instrument cluster

Internal cluster repair required. Remove cluster assembly and sublet to speedo shop for repair.

neoprene gear in transmission were the speedometer cable goes into transmission should not have a dished appearance if you pulll it out of transmission look at it from the side it should appear flat from the start of the gear to end of gear no dish down in center

replace the speedometer.

Usually it's the opposite. The speedometer works and the odomater and trip meter go inop. Most likely the speedometer assembly is bad. If the odometer is working you have a signal from the gray and black wire .

The gear in the speedometer assembly is broken causing the odometer and trip odometer to be inop. You can either buy a new speedo head or buy a gear kit from an online source (google Ford speedo odometer inop)for the kit.

I am having the same problem. I replaced the speed sensor on the rear diff. and the problem went away but when i started it the next day the problem came back. If you figure it out let me know.

Yes your speedometer, and odometer are controlled by your speed sensor.

The speedometer head is bad. You need to replac the speedometer head with either a new one or a used one. My choice would be a new one since this is a common problem with the nissan pick up. I have had one of my own go bad and act just like the one you have.

This issue is caused by faulty motors inside your Envoy instrument cluster and can only be repair by taking out the instrument cluster and replacing the motors which requires de-soldering and soldering tools and the correct replacement parts.

I repair Envoy instrument clusters for a very reasonable amount and have a free 12 Year Guarantee on my work, you can see my site at www.DrSpeedometer.com