A $ 5 billion dollar-denominated portion from GM drew about $ 21 billion of bids , an analyst looking at the deal said .
A $ 5 billion dollar-denominated portion has seen about $ 19 billion of bids , investors said .
Both figures were below consensus expectations , but August sales were revised to a 1.2 percent increase from a previously reported 0.6 percent gain , fueling a dollar rally .