Dash lights, speedometer light, gear indicater lights don't work on 99 gmc truck

If you paid a mechanic to do the work, and the problem just started, take it back. Unless you replaced it yourself, you will void any warranty if you try to fix it yourself.

You need to remove dash to replace burnt light bulb...Often happen that connection fail due to overheating and lose connections..

check the individual indicater bulbs are all working ,actually look at each one not just the dash indicater light ,if all ok try the hazard switch if same happens the indicator relay needs changing if not the light/indicator switch will need replacing i would think good luck

clutch

These lights for the dash are controlled by a rheostat instrument control dimmer switch next to the main light switch for the headlights, it is either turned off (have seen this dozens of times) or it is defective. Below is a picture of the switch assembly I speak of. The thumb wheel next to the knob is the dimmer control.

it could be a blown fuse, check the fuses in the fuse box.........cheers.

I have gmc jimmy speedomter wront work abs light comes on will not shift we Chang the vss still disentangle help

if the rest of your dash and instrument lights work and it's just the speedo that stays dark you have a bulb burnt out in your dash cluster.

check for blown fuse(s). Seems like you tapped into the backup light circuit.

high beam indicater is most likely a bulb,,,the dash lights are most likely the dash dimmer gone out.///replace