not sure why they'd be different colors, but there are two places with small arrow cutouts that are the dash signal indicators, usually green IIRC, with a cardboard tube behind that has the colored lense .... and then there's a small red jewel for the high beam indicator ... the 55's may not have the turn indicator inserts as I think that was the first year for the optional signals, but after that they all had them even if the signals weren't ordered .... and this isn't burb specific, all the trucks were the same, it's an electrical question
Bill
