You have a bad harness. Pick one up at a salvage yard for about $40 a side or pay about $125 at the dealer
Check bulbs, fuses, and check for wiring problems
Check bulbs Depending on the year there were some problems with the fixtures themselves and have to be replaced
The 2002 Chevy Avalanche does not have user replaceable radio bulbs. The radio needs to be dismantled by a qualified technician to replace the bulbs.
It seems to happen to a lot of express vans. The ground wire in the socket for the bulbs often corrodes and looses contact.
The # is 1157 bulbs.
The bulbs are located for the headlights under the hood of the car.
Check the bulbs one of the 2 filaments may be burned out
how do I replace interior light bulbs in 2002 chevy impala. I removed the cover, but the bulb is cramped in and I can't pull it out.
Remove 2 screws that hold lens on, remove lens, then you should be able to change bulbs without any problems
How_do_you_change_the_fog_lamp_bulbs_on_2002_Chevy_Impala
There are several places one can purchase amaryllis bulbs. Online retailers include Tytyga, Eden Brothers, Bulbs Direct, Ali Express, and Holland Bulb Farms.
If you can't access the bulbs take the light assy off and turn the bulbs counterclockwise to remove them