2000 Alero brake light balbs removed are 3057--book calls for 3157--which is right

sounds like your multifunction switch is bad need to replace it

should be 3157 for brake lights 3057 for running lights

You need a T-15 star bit driver that is referred to as TORX. On the top and bottom of tail light are the screws. Carefully remove the chrome trim then the light pulls out after applying slight upward pressure. Once you twist out the socket the bulb simply unplugs. It should be either a 3057 or 3157 bulb.

There is no separate fuse for one brake light,check the connector at the brake light bulb,and replace the bulbs,do not change the bulb out with a similar number,like if it uses a 3057 bulb,do not use a 3157,they are different.Look at the terminals,with no voltage to the light,and bend the contacts for the bulb inward to make sure there is contact.

No there not connected, replace the brake light
1999 Chevrolet Blazer Auto Light Bulb Size Guide
Low Beam Headlight Bulb Size: 9006
High Beam Headlamp Light Bulb Size: 9005
Parking Light Bulb Size: 3157
Front Turn Signal Light Bulb Size: 3157
Rear Turn Signal Light Bulb Size: 3057
Tail Light Bulb Size: 3057
Stop Light Bulb Size: 3057
High Mount Stop Light Bulb Size: Assembly
Fog/Driving Light Bulb Size: 880 or 881
License Plate Light Bulb Size: 194
Back Up Light Bulb Size: 3156
Front Sidemarker Light Bulb Size: 194
Ash Tray Light Bulb Size: 161
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168 or 211-2
Step/Courtesy Light Bulb Size: 168 or 211-2
Trunk/Cargo Area Light Bulb Size: 211-2
Under Hood Light Bulb Size: 93
Instrument-General Light Bulb Size: 161 or 37 or PC194 or PC74
Check Engine Indicator Light Bulb Size: PC74
Hi-Beam Indicator Light Bulb Size: PC74
Seat Belt Indicator Light Bulb Size: PC194
Brake Warning Light Bulb Size: PC74
Automatic Transmission Indicator Light Bulb Size: 194
Directional Signal Indicator Light Bulb Size: PC74
As for the horn, inspect the fuse and relay and most common it would be a bad ground wire or worst a bad horn due to corrosion. Horn will be located in the drivers side fender.
Thank you for using fixya.

2005 CHEVROLET Malibu
Low beam headlamp
H11

High beam headlamp
H9

Parking light
3157

Front turn signal
3157

Rear turn signal
3057

Tail light
3057

Stop light
3057

High mount stop light
912

Fog/Driving light
880

License plate
194

Back up light
921

Front sidemarker
24

Rear sidemarker
194

Ash tray
161

Glove box
194

Map light
168

Dome light
561

Step/Courtesy light
168
37

Trunk/Cargo area
211-2
http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm You can find all auto bulb info here.As far as the fuse there should be a fuse diagrahm on the back of the access door.Well hope this helps.

IT SEEMS THAT YOUR TAIL LIGHT BULBS ARE BLOWN, DO YOUR TURN SIGNALS FLASH FASTER THAN NORMAL ? IF SO IT IS FOR SURE THE REAR BULBS. TO REPLACE THE BULBS,LOOK IN THE TRUNK,& YOU WILL EITHER SEE SOME BLACK T HANDLE NUTS OR 10 OR 11 MM NUTS, THAT HOLD THE TAIL LIGHT ASSEMBLY IN TAKE THE NUTS OFF,& CAREFULLY PULL THE ASSEMBLY OUT ,YOU WILL SEE THE SOCKETS, SOME HAVE A LITTLE CATCH ON THEN LIKE A GALLON ANTIFREEZE JUG HAS THAT YOU HAVE TO PUSH IN,&THEN TWIST & OTHERS JUST TWIST OUT,IT SHOULD TAKE EITHER A 3157 OR 3057,BULB, BUT CHECK TO SEE FOR SURE AT THE AUTO PARTS WHERE YOU BUY THE BULBS.

check the light they they can be on the wrongmay and check the light number i think there 3157 or 3057

hi inside the trunk pull back the trunk liner and there will be 3 maybe 4 plastic wing nuts remove them then remove the tail light assembly then change the bulb should be a 3057 or 3157 and reassemble
hope this helps

There is a metal tab that makes a contact for power to all three bulbs. Remove the taillight assembly and check the contact.