Searched for 10mins and cannot seem to find this. I saw an 1157 somewhere but those are normally for parking/brake lights where its two filament. Im thinking it has to be 1156, but I cant remember when I last took the license plate holder off if the bulb was socket or flat (since the tail light bulbs are flat).

Dixit

 

OM says #2057

 

2057? Damn never heard of that number. What I dont get is that relates to the 1157 bulb which is a dual filament. Why would they need that for the reverse lights?

 

OEM is #2057, and it is double filament as well. I believe you can fit an 1157 as well, because I've looked at both bulbs orientation and they have the same. Not sure about the difference in the bulbs wattage though, but it shouldn't be an issue- , plus don' know why GM used double filament.

 

This was posted a while ago. Wish I could remember who and I'd give him credit. Useful though

2003 CHEVROLET Corvette

Low beam headlamp
9006
9006ST Silverstar High Performance Halogen Upgrade: The Look of HID: Whitest, Brightest
9006XV XtraVision Halogen Upgrade: Up to 20% Brighter
9006CB Cool Blue Halogen Upgrade: White Hot; Super Cool; 100% Street Legal
9006LL Long Life Halogen Upgrade: Lasts one and a half times longer

High beam headlamp
9005
9005ST Silverstar High Performance Halogen Upgrade: The Look of HID: Whitest, Brightest
9005CB Cool Blue Halogen Upgrade: White Hot; Super Cool; 100% Street Legal

Parking light
4157NALL
4157AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style

Front turn signal
4157NALL
4157AST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style

Rear turn signal
3057
3057LL Long Life Upgrade: Up to twice the life of the standard lamp

Tail light
3057
3057LL Long Life Upgrade: Up to twice the life of the standard lamp

Stop light
3057
3057LL Long Life Upgrade: Up to twice the life of the standard lamp

High mount stop light
%COM

Fog/Driving light
899

License plate
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Back up light
2057
2057LL 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

Glove box
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Map light
212-2

Step/Courtesy light
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
37

Under hood light
561

Instrument-general
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

 

Thanks, that's god info.