New OEM factory surplus Engine Control Module ECU, E.C.U. (12576523) 218-12603, 21812603 for a 2004-2006 Cadillac XLR, 2005-2006 Cadillac STS & 2004-2006 Cadillac SRX . This ECU is designed for the 4.6L (LH2) Northstar, North Star engine with the 5L50-E (M22) transmission. We can refer a reputable programmer/tuner to bench top program the ECU for you.
No Core Charge.
All computers will require programming to your vehicle VIN#. We do not program vehicle computers, but can recommend a couple bench top programmers other than your GM dealer for some of the computers we sell. If you would like a recommendation on a programmer, please mention this in your order notes at the time of purchase and we will include a list with your order.
Please note: This product is not eligible for return. All sales final on electrical parts. Refer to our Return Policies for more details.
It is the responsibility of the buyer to verify fitment prior to purchase.
Please refer to the part number on the part to be replaced/contact your GM dealer with your VIN and the part number in question to ensure accurate application.
OEM stands for Original Equipment Manufacturer. Carrying OEM parts means that we carry parts that were used by your vehicle's manufacturer in the first place. You can be sure our parts will work for your car, because we sell the parts that were used to make your car!