Does anyone have the part #'s for all of the parts needed to plug in the rear 3-marker led light, rather than just having to splice it in?

Also, does anyone know what connectors I could use to hook up the rear license plate lights on an aftermarket bumper, rather than having to cut off the factory connector?

Anyone?

Did a write-up a while back. Here ya go ....

http://dieselplace.com/forum/showthread.php?t=12521

Thanks, I thought I remembered seeing those part #'s around here somewhere. Do you see any reason why I could not splice into this connector to obtain power to the license plate lights on my aftermarket bumper?

From that post I see 4 part numbers:
1. contact to insert into the plug is 15326004
2. weather resistant purple grommet is 184141-1
3. Third light part number is 15744722
4. connector is 12085524

So, would I need to order all 4? Is that post implying that there is a plug in under the bed that I can just plug the thing into?

TEXMudder, If you get the contacts and plugs, the answer is "mostly yes". You have to take the retainer off the existing plug and insert your wires that have been soldered to the contacts (along with the purple moisture grommets). It's a five minute job at the outset. It took me longer with a test probe to find the right empty sockets in the plug for positive and negative parking light power.

Look at the pics I posted in the linked thread noted above.

Got an idea on the cost?

See http://www.gmdieseltech.com/store2/cart.php?target=product&action=view&product_id=16215&category_id=254 for the rear clearance light at $22. He can probably get you the plug, too. I paid about $17 I think. Another $4-6 for the connector pins and grommets and you're done.