The Uplander replaced the Chevy Venture. There isn't a replacement for the Safari or the Astro. The "Express" is the full-size work van.
Soccer moms refused to drive a "van" and the Safari and Astro looked too much like a "work" van and less like an SUV...so they dropped the line.
From Wikipedia (I had seen this in the papers too)...
"Faced with falling sales across its many vehicle lines,
General Motors began closing plants and discontinuing slow-selling vehicle lines. With new federal standards for side impact and head injury reductions coming, GM determined that there was no use in expending money for a redesign of a vehicle line that was no longer selling well. Thus, the Safari and Astro were taken out of production in 2005, and the long-serving
Baltimore,
Maryland assembly plant where both were built was closed. It was the only mid-sized van which was produced for 20 model years - a longer run than its rival, the
Ford Aerostar, which ceased production in
1997. In total, the Baltimore plant produced approximately 3,700,000 Astro and Safari vans!
In the Chevrolet line, the Astro was replaced by the
Chevrolet Uplander "crossover sport van", which also replaced the
Chevrolet Venture. Like the Astro, the Uplander is available in cargo and passenger versions, although it is generally not as utilitarian as the Astro, because it is a front-wheel drive
unibody vehicle, some see it as less durable for heavy-duty work. Buyers looking for a commercial or industrial use van tended to purchase the larger
Chevrolet Express/
GMC Savana, while those looking for a personal transport or recreational van purchased the new Uplander. GMC has not introduced a replacement for the Safari, but it is expected that the forthcoming
Acadia crossover will serve much of the Safari's former market, at least for passenger vehicles."
*shrugs*