Found this, maybe it will help you:
Info - Daytime Running Lamp (DRL) Bulb Replacement #00-08-42-010A - (06/20/2003)
Daytime Running Lamp (DRL) Bulb Replacement
2002-2003 Cadillac Escalade, Escalade EXT
2003 Cadillac Escalade ESV
1999-2003 Chevrolet Silverado Pickup Models
2000-2003 Chevrolet Tahoe, Suburban
2002-2003 Chevrolet Avalanche
1999-2003 GMC Sierra Pickup Models
2000-2003 GMC Yukon, Yukon XL
2001-2003 GMC Denali, Denali XL
This bulletin is to announce availability of new DRL bulb part number.
A new 14 volt DRL bulb, P/N 15199562 (trade bulb #4114K), is now available for use whenever a DRL lamp bulb on the above listed vehicles requires replacement. This more robust, higher voltage DRL bulb replaces P/N 1999482 (trade bulb #4157K). These bulbs should be replaced in pairs for customer satisfaction.
Parts Information
Part Number 15199562
Bulb, Daytime Running Lamp
Parts are expected to be available 6-27-2003 from GMSPO.
Maybe not, I just saw you are already using this bulb. Sorry.
Info - Daytime Running Lamp (DRL) Bulb Replacement #00-08-42-010A - (06/20/2003)
Daytime Running Lamp (DRL) Bulb Replacement
2002-2003 Cadillac Escalade, Escalade EXT
2003 Cadillac Escalade ESV
1999-2003 Chevrolet Silverado Pickup Models
2000-2003 Chevrolet Tahoe, Suburban
2002-2003 Chevrolet Avalanche
1999-2003 GMC Sierra Pickup Models
2000-2003 GMC Yukon, Yukon XL
2001-2003 GMC Denali, Denali XL
This bulletin is to announce availability of new DRL bulb part number.
A new 14 volt DRL bulb, P/N 15199562 (trade bulb #4114K), is now available for use whenever a DRL lamp bulb on the above listed vehicles requires replacement. This more robust, higher voltage DRL bulb replaces P/N 1999482 (trade bulb #4157K). These bulbs should be replaced in pairs for customer satisfaction.
Parts Information
Part Number 15199562
Bulb, Daytime Running Lamp
Parts are expected to be available 6-27-2003 from GMSPO.
Maybe not, I just saw you are already using this bulb. Sorry.
