Funny you should say that, Montana. That's the one complaint I'd make about my mother's car -- the radio sucks on her Camry too!
Slappy you are a gentleman and an automotive scholar! I looked up the Equinox V6, and GM did indeed put a 3400 motor in it. I also found this review on autosite.com, which bears out your comments about the Malibu:
2005 Chevrolet Equinox Preview
"Making 185 horsepower at 5,200 rpm and 210 lb.-ft. of torque at 3,800 rpm, the Equinox's V6 is the venerable overhead-cam Vortec 3400 engine that has been deployed in everything from the Chevrolet Venture to the Pontiac Grand Am. We haven't driven the Equinox; in other GM products this motor offers decent power off the line but becomes winded at mid- to high-rpm driving. Power delivery is somewhat unrefined, with plenty of engine racket accompanying forward velocity.
Why GM didn't design the Chevy Equinox to use the Malibu sedan's more powerful 3500 V6 is anyone's guess."
(italics are mine) Sounds like the V6 isn't bad, but the Malibu is much better!