Just went to Chevrolet's web site. It looks like the incentives have been extended to July 31. Here's the text copied from the Cevrolet web site:
*Offers range from $2000-$4000 depending on vehicle. Length of contract limited. See dealer for details.
Take delivery by 7/31/03.
Avalanche
$4,000 cash back
or 0% APR for 60 months GMAC financing for qualified buyers(1)
or 1.9% APR for 72 months GMAC financing for qualified buyers(2)
1 Monthly payment is $16.67 for every $1,000 you finance. Average example down payment is 10.9%. Take delivery by 7/31/03. Some customers will not qualify. See dealer for details.
2 Monthly payment is $14.71 for every $1,000 you finance. Average example down payment is 8.3%. Take delivery by 7/31/03. Some customers will not qualify. See dealer for details.