Chevrolet 2010 Tahoe Owner's Manual page 214

2. Write down the eight to 12 switch settings from left
to right as follows:
When a switch is in the up position, write Left.
When a switch is in the down position, write
Right.
If a switch is set between the up and down
position, write Middle.
The switch settings written down in Step 2 now
become the button strokes to be entered into
the Universal Home Remote in Step 4. Be sure
to enter the switch settings written down in
Step 2, in order from left to right, into the
Universal Home Remote, when completing
Step 4.
3. From inside your vehicle, first firmly press all three
buttons at the same time for about three seconds.
Release the buttons to put the Universal Home
Remote into programming mode.
4. The indicator lights will blink slowly. Enter each
switch setting from Step 2 into your vehicle's
Universal Home Remote. You will have two and
one-half minutes to complete Step 4. Now press
one button on the Universal Home Remote for
each switch setting as follows:
If you wrote Left, press the left button in the
vehicle.
If you wrote Right, press the right button in
the vehicle.
If you wrote Middle, press the middle button in
the vehicle.
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