I couldn't find one all-inclusive thread, so here is the info from the Sylvania site:
1987 BUICK Regal
Low beam headlamp
H4656
H4656ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H4656XV XtraVision Halogen - The Brighter Light
H4656CB Cool Blue Halogen - The Whiter Light
H4656LL Long Life Halogen Upgrade: Lasts 6x longer
High beam headlamp
H4651
H4651ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H4651CB Cool Blue Halogen - The Whiter Light
Parking light
2057A
2057AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
2057ALL Long Life Upgrade: Up to twice the life of the standard lamp
Front turn signal
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
Rear turn signal
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
Tail light
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
Stop light
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
High mount stop light
1156
1156LL Long Life Upgrade: Up to twice the life of the standard lamp
License plate
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Back up light
1156
1156LL Long Life Upgrade: Up to twice the life of the standard lamp
Front sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Rear sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Ash tray
1445
161
Glove box
1891
Map light
211-2
912
912LL Long Life Upgrade: Up to twice the life of the standard lamp
Dome light
561
Step/Courtesy light
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
562
89
906
Trunk/Cargo area
1003
1003LL Long Life Upgrade: Up to twice the life of the standard lamp
Under hood light
89
Instrument-general
161
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp
1893
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
53
74
Hi-beam indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
53
74
Seat belt indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Brake warning
161
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Automatic transmission indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Clock
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Directional signal indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
53
Ignition switch
161
Radio dial
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp
1893
1987 BUICK Regal
Low beam headlamp
H4656
H4656ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H4656XV XtraVision Halogen - The Brighter Light
H4656CB Cool Blue Halogen - The Whiter Light
H4656LL Long Life Halogen Upgrade: Lasts 6x longer
High beam headlamp
H4651
H4651ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H4651CB Cool Blue Halogen - The Whiter Light
Parking light
2057A
2057AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
2057ALL Long Life Upgrade: Up to twice the life of the standard lamp
Front turn signal
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
Rear turn signal
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
Tail light
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
Stop light
2057
2057LL Long Life Upgrade: Up to twice the life of the standard lamp
High mount stop light
1156
1156LL Long Life Upgrade: Up to twice the life of the standard lamp
License plate
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Back up light
1156
1156LL Long Life Upgrade: Up to twice the life of the standard lamp
Front sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Rear sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Ash tray
1445
161
Glove box
1891
Map light
211-2
912
912LL Long Life Upgrade: Up to twice the life of the standard lamp
Dome light
561
Step/Courtesy light
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
562
89
906
Trunk/Cargo area
1003
1003LL Long Life Upgrade: Up to twice the life of the standard lamp
Under hood light
89
Instrument-general
161
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp
1893
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
53
74
Hi-beam indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
53
74
Seat belt indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Brake warning
161
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Automatic transmission indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Clock
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
Directional signal indicator
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
53
Ignition switch
161
Radio dial
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp
1893