Code E49 is air management system problem, and is most commonly a faulty combination valve. The one mounted on the rear valve cover that contains the switching and diverter valves and solenoids. As far as the bulbs, I can find no procedures in ALLDATA, and I have no service manual at home. I will try and research tomorrow and get back.

Answered by factoryjack (expert)
4,285 answers provided

Hello and thank you for your help. The E49 error was a "Leaking gas line on the low pressure return" and I have service scheduled at my cadilliac dealer Tuesday on this. Weird Huh? I was looking at those valves too.
However if you can help me on the light situation I would greatly appreciate it, I still have no Idea how you get to the back of the inside front bumper light.

Thanks again!!

Direct: grand_inquisitor@sbcglobal.net

Response from Mike123
1 question asked

Thanks Again!!!

Response from Mike123
1 question asked

use a long screwdriver to turn bulbs from top and pull them through
holes in radator support panel sqeek them in the same way. u may have to remove battery for help

Answered by cadieman (expert)
2,925 answers provided

Thank you for the response that seems like the logical way to do it.
Do you happen to know the replacement bulb part no or bulb number? My manual lists several. It should only have one element since it does not blink.

Response from Mike123
1 question asked

Do you have the bulb out? If it is a large bulb with a brass base, and a single filament, it should be 1156. If it is a small(peanut) bulb with a push in glass base, it is a 194. If it is amber(yellow) in color, add NA to the end of the number.

Answered by factoryjack (expert)
4,285 answers provided