add_action( 'genesis_before_post_content', 'trailer_meta_content' );
/**
 * Show trailer meta content.
 *
 * @since 1.0
 * @author Gary Jones
 *
 * @global stdClass $post WP Post object
 * @global string $prefix
 * @return null Returns null if post type is not "trailer"
 */
function trailer_meta_content() {

    global $post, $prefix;

    // If not our trailer post type, bail out
    if ( 'trailer' != get_post_type() )
        return;

    // Set up grabbing the attributes and their outputs.
    // You should wrap each string in __() for translations.
    // Also check out genesis_get_custom_field().
    $attributes = apply_filters( 'trailer_attributes', array(
        array( get_custom_field( $prefix . 'inventory_number' ), 'Inventory Number: %1$s<br /><a href="/contact?inventory=%1$s" title="contact us about this equipment">Contact us about this equipment</a>' ),
        array( get_the_term_list( $post->ID, 'status', 'New/Used: ', ' ', '' ), '%s' ),
        array( get_the_term_list( $post->ID, 'classification', 'Classification: ', ' ', '' ), '%s' ),
        array( get_custom_field( $prefix . 'year' ), 'Year: %s' ),
        array( get_the_term_list( $post->ID, 'manufacturer', 'Manufacturer: ', ' ', '' ), '%s' ),
        array( get_the_term_list( $post->ID, 'type', 'Type: ', ' ', '' ), '%s' ),
        array( get_custom_field( $prefix . 'compartments' ), 'Compartments: %s' ),
        array( get_the_term_list( $post->ID, 'material', 'Material: ', ' ', '' ), '%s' ),
        array( get_custom_field( $prefix . 'location' ), 'Location: %s' ),
        array( get_custom_field( $prefix . 'capacity' ), 'Capacity: %s' ),
        array( get_custom_field( $prefix . 'code' ), 'Code: %s' ),
    ), $post, $prefix );

    // Loop through the attributes, assigning to an array
    foreach ( $attributes as $attribute ) {
        if ( $value = $attribute[0] )
            $output[] = esc_html( sprintf( $attribute[1], $value ) );
    }

    // Grab the first attachment if there is one
    $args = array(
        'post_type'      => 'attachment',
        'post_mime_type' => array( 'application/doc', 'application/pdf' ),
        'numberposts'    => 1,
        'post_status'    => null,
        'post_parent'    => $post->ID
    );
    $attachments = get_posts( $args );

    // Add the first attachment to our output array
    foreach ( $attachments as $attachment ) {
        $output[] = '<a href="' . esc_url( wp_get_attachment_url( $attachment->ID ) ) . '">Download Spec Sheet</a>';
    }

    // Echo the attributes, each on a new line, and wrapped in a div if there is anything to output.
    if ( $output = implode( '<br />', $output ) )
        echo '<div id="trailer-specifications">' . $output . '</div>';

    if ( has_post_thumbnail() )
        printf( '<a href="%1$s" title="%2$s" rel="shadowbox">%3$s</a>',
            esc_url( wp_get_attachment_image_src( get_post_thumbnail_id(), 'large' ) ),
            esc_attr( the_title_attribute( 'echo=0' ) ),
            esc_html( the_post_thumbnail( 'thumbnail' ) )
        );

}