Odometer, Speedometer and Tach not working

[BigDaddyT]

I drive a 98 Chev K1500 4WD. The Odometer, Speedometer and Tach stop working plus the truck starts in 3rd gear. Was told that without a doubt the problem is the Vehicle Speed Sensor. I changed that and it still isnt working. Any Ideas????

[03chevy]

gm trucks is very common with the cluster guages going bad. they carry a 75,000 mile warranty but the problem with that is you have to pay for it first 75.00 for them to check to make sure that is the problem then you have to pay 400.00 for the rebuild cluster guages. then they will tell you maybe just maybe the warranty will refund your money back. i have almost the same problem that you have. but mine is speedo and gas guages. i evean called gm there selves and i told them to stick it up there @#$ that some thing under factory warranty should not cost me a penny out of pocket. so i found a guy off ebay that when i get the money he is going to do it for less than half with a 5 yr warranty. sorry about my venting. and welcome to the forum!! alot of good people here to help out with anything.

[BigDaddyT]

Thanks for the help. She's got 225,000 miles on her and I wanna keep her goin.

[FaselZ71]

Yeah the other day I noticed I started my truck and it stalled... ok no problem not to concerned so I hit the key and and she fired and I gave it some gas and the RPM gauge went to 2500 and the speedo flew up to 50mph I was like WHOA that's the fastest acceration I've ever seen!!! lol So yeah I'm thinking my cluster may be going here shortly! That's ok I'll have a good excuse to build a custom sunpro or gloshift gauge cluster!

[mudseeker]

could be your ignition switch. do or did you have a check gauge light? how about any transmission codes?

here's my thread on the problem, sounds similiar to yours.
electrical nightmare

[FaselZ71]

No that's what I was wondering because there is no check engine light no codes that I'm aware of I normally try to keep those lights off because there annoying to me! ADHA keeps me watching everything at once so that little orange light bugs me! And it definalty doesn't flash at all!

[mudseeker]

copy/paste
Subject: MIL On, Transmission Stuck in Second or Third Gear, IPC Inoperative, DTCs P0740,P0753,P0758,P0785,P0787,P0973,P0976,P1860,P2 761,P2764 and/or P2769 Set (Verify and Repair Source of Voltage Loss #01-07-30-002E - (09/23/2005)



Models: 2006 and Prior GM Passenger Cars and Light Duty

2005-2006 ****** H2

2006 ****** H3

2005-2006 Saab 9-7X

with 4L60-E, 4L65-E, 4L80-E or 4L85-E Automatic Transmission (RPOs M30, M32, M33, MT1, MN8)




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This bulletin is being revised to update model years, add additional models and add additional diagnostic information. Please discard Corporate Bulletin Number 01-07-30-002D (Section 07 -- Transmission/Transaxle).


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Condition
Some customers may comment on one or more of the following conditions:

� The Malfunction Indicator Lamp (MIL) is ON.

� The transmission is defaulted to second gear(4L80/85-E).

� The transmission is defaulted to third gear (4L60/65-E).

� The instrument cluster is inoperative.

Upon investigation, one or all of the diagnostic trouble codes (DTCs) P0740, P0753, P0758, P0785, P0787, P0973, P0976, P1860, P2761, P2764 and P2769 may be set depending on the vehicle.

Cause
The most likely cause of this condition may be a loss of voltage to the transmission solenoid power supply circuit.

This condition may also be the result of an incorrect installation of an aftermarket electronic device such as a remote starter or alarm system.

Correction
Important: If the vehicle is equipped with an aftermarket electronic device and the DTCs are being set when the device is being used, verify that the appropriate fuse is being supplied battery voltage during operation. If voltage is not present at this fuse, these DTCs will be set due to lack of voltage at the solenoids. This condition is most likely to occur with an incorrectly installed remote starting system. If this is the case, refer the customer to the installer of the system for corrections. ANY REPAIRS DUE TO AFTERMARKET INSTALLATION OF ACCESSORIES IS A NON-WARRANTABLE ITEM.

With the ignition switch in the RUN position, test for battery voltage at the circuit fuse in the transmission solenoid power supply circuit. Refer to the appropriate SI Document for the transmission solenoid power supply circuit information.
If battery voltage is present at the fuse, inspect the ignition voltage circuit between the fuse and the transmission for possible opens.
If battery voltage is not present at the fuse, test for continuity between the fuse and the ignition switch. If NO continuity is between the fuse and the ignition switch, repair the open in that circuit.
If you have continuity between the fuse and the ignition switch, the most likely cause is the ignition switch. Replace the ignition switch using the appropriate Ignition Switch Replacement procedure in SI. Refer to group number 2.188 of the parts catalog for part description and usage of the ignition switch.

[FaselZ71]

Ok please forgive me but what was that all about?

[mudseeker]

service bulletin that may solve the original posters problem.

[FaselZ71]

oh ok! ha ha