Very common problem with GM clusters.
Message Posted: Jan 31, 2012 2:06:02 PM
There is no "in-line" fuse.
Gear indicator light is a bulb that is probably burned out.
You might try Dash fusebox, #20 on the side of the dash. It should be a 10 amp fuse.
There is a factory service bulletin, but for this one, the transmission stays in 3rd gear.
Can you check the PCM for Stored Codes? If so, read below.
The transmission is defaulted to third gear (4L60/65-E). â€¢ The instrument cluster is inoperative. â€¢ 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. 1. If battery voltage is present at the fuse, inspect the ignition voltage circuit between the fuse and the transmission for possible opens. 2. 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. 3. 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
I've used these guys before:
Start with the basics. Check the fuse panel. Check the wiring. Check to see if there is an in line fuse. Follow the wires from the speedometer to the transmission. Something is loose or broken along those lines
Message Posted: Jul 12, 2010 8:34:10 AM