Buick 1998 Riviera Owner's Manual page 119

1. Push the extended tab (above the GARAGE button)
or insert a screwdriver between the tab and outer
edge of the cover. The garage door opener cover will
flip down.
2. Remove the square height adapters from the cover.
Refer to the chart to determine the number and
location of the height adapters for your garage door
opener. I f your unit does not appear on the chart, you
will have to
try
different adapter number and
location combinations.
LINEAR ET-2 1 6 4
LINEAR D22B 1 6 3
2
6
3
2-52