Would a 2000 or 1999 Blazer turn signal lever be compatible with a 2003 Impala?

Looked them up and they will swap out,perfect fit,

Multifunction Turn Signal Lever Replacement - On Vehicle

Removal Procedure

1. Verify that the multifunction turn signal lever is in the center of the OFF position.
2. Disconnect the negative battery cable.
3. Disable the SIR system.
4. Remove the steering wheel.
5. Remove the steering column trim cover.
6. Remove the steering column knee bolster.
7. Remove the steering column wire harness (1) from the steering column wire harness retainer (2).
8. Remove the 2 wire harness straps from the steering column wire harness (1).
9. Remove the steering column bulkhead connector from the vehicle wire harness.
10. Disconnect the connectors from the multifunction turn signal lever steering column bulkhead connector.

1. Remove the retaining bolts (1) from the multifunction turn signal lever (2).
2. Remove the multifunction turn signal lever (2) from the steering column.

Installation Procedure

1. Install the multifunction turn signal lever (2). Use a small flat-blade in order to compress the electrical contact and move the multifunction turn signal lever into position.
2. Verify that the electrical contact rests on the canceling cam.

Notice: Refer to Fastener Notice in Service Precaution.

1. Install the retaining bolts to the multifunction turn signal lever.

• Tighten the retaining bolts to 7 Nm (62 inch lbs.) .

1. Connect the gray and black connectors to the multifunction turn signal lever steering column bulkhead connector.
2. Connect the steering column bulkhead connector to the vehicle wire harness.
3. Install the two wire harness straps to the steering column wire harness (1).
4. Install the steering column wire harness (1) to the steering column wire harness retainer (2).
5. Install the steering column knee bolster.
6. Install the steering column trim cover.
7. Verify that the lever is in the center or the OFF position.
8. Install the steering wheel to the steering column.
9. Enable the SIR system.
10. Connect the negative battery cable.

I hope this helps you.

Thanks

On the Impala the flasher is located behind the dashboard, just to the right of the steering wheel. You have to remove the dashboard to get to it. It square and about 2" long. To remove the dash:
- remove the two fuse compartments doors or lids, that are on either end of the dashboard. there are two screws to remove on both sides.

- Remove the kick plate beneath the dash on the passenger side.
- Remove screws beneath the dash on drivers side
- Adjust steering wheel to the full down position
- Move Shift lever all the way down

You only need to disconnect negative battery cable to make it safe to work on.

you will need to pull steering wheel you have a clock spring for the air bag behind it dangerous for a on trained technician simply put the air bag could kill you

im thinking that you have already checked the bulbs so the next step is to replace the flasher and it its still not working more than likey its the turn sig switch itself

HI try paying whit the turn signal switch is you can get it to work by moving it little by little before it engages you need a turn signal switch .hope this helps let me know how it go

The brake lights are routed through the signal light switch.
Looks like that will be the next switch to replace and the problem.

we had the same problem with our 2003 impala...took it to the shop and was told it was the hazard lights.

sounds like that the position cable is seizing up seek WD 40 service perhaps !!