My HD extended cab has a 1 piece shaft. There is actually a TSB on the 2 piece shafts. If you have a vibration, GM replaced them with a 1 piece. My drive shaft is at least 4" diameter aluminum. Might be bigger.
My HD extended cab has a 1 piece shaft. There is actually a TSB on the 2 piece shafts. If you have a vibration, GM replaced them with a 1 piece. My drive shaft is at least 4" diameter aluminum. Might be bigger.
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