Part Number 0 281 011 134 or 8973037511 - You must match this! Fitment/Interchange You must match your part number exactly as seen above. If any numbers are off compared to your original it will not work properly. NOTE: You must repair the wiring harness where it is bundled together near the connector. It is a common issue that the wiring wears against each other, gets exposed and then pops the FICM.** FICM will fit 2004 and 2005 Chevy Duramax Diesel 6.6L models with an exact part number match. May fit 01-03 models but you must have a part # match. Tech Notes FICM has been rebuilt then tested by our experienced technicians. Some of these are listed below: Common failures with this style FICM have been repaired FICM powered up and has communication! Install Notes Disconnect the negative terminal of the battery. Make sure the battery connector is not touching the battery post. Disconnect and remove the module to be replaced. Install and connect the replacement module. Connect the negative terminal of the battery. Item Condition Pins perfect, none are broken or bent. Lock tabs in place. Warranty / Optional Core Return This FICM comes with a 6 month warranty from the date of purchase. Please keep a copy of your purchase record which we will send with your item. We will include a prepaid label for your core. Once your core returns we will issue a $50 partial refund.