Chevrolet 25515446 Antenna Assembly, Radio

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To replace a power antenna, start by lowering the antenna mast fully by turning off the radio or ignition key switch. If the unit has failed with the antenna mast in the 'Up' position, it may be advisable to cut off the mast portion to make replacement easier. Next, disconnect the negative battery cable. Access to the power antenna motor is through the inner fender panel, so raise the vehicle and remove the front tire if necessary for better access. Remove the fender skirt attaching screws and pull the splash shield forward to gain access to the antenna connections, using a piece of 2 x 4 lumber as a spacer to keep the shield pulled away. Remove the escutcheon nut and spacer at the fender, then disconnect the electrical leads and remove the antenna and motor assembly through the fender skirt opening. When installing a new unit, make sure the mast is fully retracted and the lower bracket is securely attached to the body.

Fit the antenna into position, then loosely install the antenna gasket and upper nut. Loosely install the antenna-to-bracket retaining bolts.

Loosen the antenna escutcheon nut on top of the fender using a special tool J-28641 or an equivalent, remove the two side mounting bolts through the engine compartment, and disconnect the antenna lead in the cable.

For fixed antenna routing, remove the mast from the base and the trim piece from the antenna housing. Disconnect the housing mounting screws and remove the antenna lead-in cable, routing it out through the engine compartment. Remove the antenna base assembly and install the new base assembly, routing the lead-in cable towards the radio. Secure the antenna housing with the mounting screws and tighten them. Install the trim for the antenna housing and attach the antenna to the base.

It may be advisable to cut off the mast portion to make replacement easier.