Squarebody Adventures

One man's adventures of rebuilding a 1987 GMC R1500 Longbed

Lighting

Bulb Size Color Incandescent (watts) LED (watts) Saved (watts) Base
Back up Light 1156 Clear 26.9W     BA15S
Brake Light 2057 Clear 6.7W/27W     BAY15D
Cargo Area Light 1142 Clear 18.4W     BA15D
Clock Light 194 Clear 3.8W 0.8W -3W W21X92D
Courtesy Light 194 Clear 3.8W     WX21X9D
Dome Light 211-2 Clear 12.4W     T-3
Engine Compartment Light 93 Clear 13.3W     BAY15S
Front Turn Signal/Parking Light 2057 Amber 6.7W/27W     BAY15D
Headlight High H4651 Clear 50W 60W +10W  
Headlight Low H4656 Clear 40W NA    
Headlight High/Low H6054 Clear 35W/65W 55W/60W +20W/-5W  
High Beam Indicator Light 168 Clear 4.9W 0.8W -4.1W W21X92D
Instrument Panel Lights 161 Clear 2.6W 0.8W   W21X92D
License Plate Light 67 Clear 8W     BAY15S
Parking Brake Indicator Light 168 Clear 4.9W 0.8W -4.1W W21X92D
Radio Dial Light 1893 Clear 4.6W     BA9S
Radio Display Light 1893 Clear 4.6W     BA9S
Rear Turn Signal Light 2057 Clear 6.7W/27W     BAY15D
Seat Belt Light 168 Clear 4.9W 0.8W -4.1W W21X92D
Side Marker Light 168 Clear 4.9W 0.5W -4.4W W21X92D
Tail Light 2057 Clear 6.7W/27W     BAY15D
Turn Signal Indicator Light 168 Clear 4.9W 0.8W -8.2W W21X92D

Lighting Base to Bulbs Codes

T10 Base = W5W (5W), 147 (3W) , 152 (35W), 158 (3.3W), 159 (5W), 161 (2.6W), 168 (4.9W), 175 (10W) 192 (4.3W), 193 (4.6W), 194 (3.8W)

T15 Base = T15 bulbs are slightly larger than T10 bulbs but use the same wedge as a T10 bulb. 906 (9W), 912 (12W), 921 (18W)

BA15S Base = 67 (8W) 93 (13.3W), 199-I (28.9W), 1003 (12W), 1141 (18.4W), 1156 (26.9W), 1250(49.9W), 1295(37.5W)

BA15D Base = 1130 (16.8W), 1142 (18.4W), 1176 (8W/17W)

BAY15D Base = CE3 (18.7W/5W), 198 (28.8W/9.5W), 1034 (23W/8.6W), 1154 (16.6W/5.3W), 1157 (26.9W/8.3W), 2057 (26.9W/6.7W), 2357 (28.2W/8.3W), 2397 (28.6W/8.3W), 7528 (5W)