new dvd unit which harness

Hey guys i have been looking around for a DVD unit and found the kenwood. right now im getting a service theft system error on my 2004 pontiac grand prix and its becuase im not useing the right harness i was using the GMRC-01 after looking around i found the GMOS-01 on crutchfield, this one gives you both the factory connection on the data bus II connection. The other one i found was the Peripheral GMAH24 along with the Peripheral GMAHCM for the chimes. Im not sure which one to purchase. But i require it to stop the Service theft system error, any ideas? Links at the bottem.

Peripheral GMAH24

http://www.cardomain.com/item/PERGMAH24

GMRC-01

http://www.crutchfield.com/S-Cdvvtr4Ysdl/cgi-bin/ProdView.asp?g=751&tab=essential_info&i=120GMOS01#Tab

You need the C2R-GM24 for Kenwood to be able to operate properly with the vehicle and retain previous functions. Vehicles supported: 2000-2003 Cavalier, Impala, Monte Carlo and Trail Blazer-non-Bose® 2002-2003 Malibu 2002-2003 Envoy SLE-not SLT 2001-2003 Montana and Venture 2003 Avalanche, Express, Silverado, Suburban, Tahoe, Savana, Sierra-not Denali, Yukon SLT and Bravada 2004 Grand Prix GTP PAC C2R-GM24Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

that one looks like it will work but it doesnt have the second plug for the data bus2 is that oging to be a issue?

The databus is retained via the module.Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA