Chevrolet is offering the following on 2002 and 2003 Avalanches through October 31, 2002:
2002 Chevrolet Avalanche
$2,000 or 0.0% for 36/1.9% for 48/2.9% for 60 PLUS $500 Bonus Cash
2003 Chevrolet Avalanche
$1,500 or 0.0% for 36/2.9% for 48/3.9% for 60 PLUS $500 Bonus Cash
So you can take the rebate - $2,500 with the bonus cash OR you can take the finance rate and the $500 - IMHO 1.9% for 48 months plus the $500 is the sweetest deal. ?$1.9 is practically free money - your interest would be around $600 to $1,000 assuming you financed 70% to 80% of the vehicle.
Good luck on getting the extra rebate! You might have better luck getting the dealer to throw in some extras instead. It don't hurt to try. My AV was late and the dealer threw in free oil changes for a year.