Buying at lower levels in heavyweights, select banking, auto and other old economy stocks has seen the Sensex gains 22 points to 6,389 in the opening trades. The Nifty has crossed the 2,000 level in early trades, and is up 10 points at 2,008.Reliance is up a per cent (Rs 4) at Rs 530. While ITC is up Rs 3 at Rs 1,280, HLL is up a tad at Rs 142.SBI is up a per cent (Rs 5) at Rs 610, while ICICI Bank has added 1.65% (Rs 6) to Rs 360.ONGC has clocked a per cent gain (Rs 8) to Rs 792.Bajaj has jumped 3% (Rs 33) to Rs 1,104 in early trades, and Maruti is up a per cent (Rs 4) at Rs 441. Hero Honda and Tata Motors have opened marginally lower at Rs 575 and Rs 495, respectively.Bharti is up 1.28% (Rs 3) at Rs 214. Hindalco has slipped sharply in the opening trades to Rs 1,329 - down Rs 38 or 2.78%.Infosys has opened weak with a loss of 1.23% (Rs 25) at Rs 2,018. Wipro at Rs 692 (up Rs 3) and Satyam at Rs 381 (up Rs 2) have commenced with steady gains.