I have been searching for this for a while. Has anyone done this mod on their Lumina? I know many have aftermarket coolers. Just wondered. If y ou have is this all of the parts needed? I have been buying parts from these guys for a bit. No problems with them. You just need to know your part numbers. This would be for a 1996-99.

Corndog Man

http://www.gmpartsdirect.com/. Phot below

Part Numbers -

GM PART # 10275682
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $60.45
OUR PRICE: $31.45
DESCRIPTION: COOLER

GM PART # 10416317
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $23.02
OUR PRICE: $13.64
DESCRIPTION: HOSE ASM

GM PART # 10227107
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $6.81
OUR PRICE: $4.04
DESCRIPTION: BRACKET

GM PART # 10254586
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $6.81
OUR PRICE: $4.04
DESCRIPTION: PIPE ASM-

http://www.partsvoice.com/ipc/images/parts_shop/images/001/127/00112745.tif

Anything you can do to keep the transmission oil temperature more moderate (not too hot NOR too cold) is a good thing. If you can do it with factory parts at a reasonable cost, all the better.