2004 Cadillac Escalade EXT Engine Control Module

You should remove any debris from around the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing or replacing the PCM, and should ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.

These include the addition of but are not limited to one or more of the following modifications: propane injection, nitrous oxide injection, additional modules (black boxes) that connect to the vehicle wiring systems, revised engine calibrations downloaded for the engine control module, and calibration modules which connect to the vehicle diagnostic connector Modification to the engine turbocharger wastegate.

You need to remove either the nut or bolt securing the main engine wiring harness ground terminal to the right cylinder head, remove all rust from the ground terminal, the cylinder head, and the retaining nut or bolt, and position the main engine wiring harness ground terminal and install the nut or bolt, and apply some type of electrical moisture sealant to protect the harness terminal from further corrosion.

When a dealer is performing a repair under the New Vehicle Limited Warranty, they are required to use only genuine GM or GM-approved parts and accessories. This applies to all warranty repairs, special policy repairs, or any repairs paid for by GM. Parts and accessories advertised as being °the same° as parts manufactured by GM, but not sold through GM, do not qualify for use in warranty repairs, special policy repairs, or any repairs paid for by GM.

You need to disconnect the negative battery cable, release the PCM cover mounting tabs and the PCM cover from the mounting brackets, and remove the PCM cover. You also need to loosen the PCM electrical connector bolts, disconnect the PCM electrical connectors, release the spring latch from the PCM, release the PCM mounting tabs from the PCM, and remove the PCM.