The current Buick Lucerne shares its underpinnings with both the Cadillac DTS and the Chevrolet Impala, but all three vehicles are set to go their separate ways when they're refreshed in a couple years. Last month we told you that the Impala was staying FWD, and now Motor Trend is reporting that the Lucerne could still receive RWD, but it won't be as big as the DTS/STS replacement. GM is looking into the feasibility of producing a smaller Lucerne that will ride on a wheelbase several inches shorter than the 118.5-inch spread slated for the future Caddy.
The move to shrink the Lucerne will have a lot to do with stricter CAFE standards in the years ahead. MT wisely points out the fact that the Pontiac G8, which already sits on a smaller Zeta platform, shows that RWD isn't always a fuel drain. The current Lucerne is pulled with the front wheels, and gets 16/25 with the ancient 3.8-liter V6 and 15/22 with the 4.6-liter Northstar, while the smaller G8 achieves 17/25 with the 3.6-liter unit and 15/25 from the tried and true 6.0-liter pushrod. Besides the smaller Zeta's fuel economy advantages, downsizing the Buick helps keep the Caddy exclusive over the more pedestrian Lucerne.
It has been rumored for the last few months that Chevrolet would be soldiering on with a front-wheel-drive Impala for at least the next few years. The recent contract agreement between the Canadian Auto Workers union and General Motors appears to cement this rumor as fact. According to the signed pact, GM promised to keep the Oshawa Assembly plant, where the current-generation Impala is made, open until 2012 -- two years longer than first planned. The Impala is a pretty good seller for the General, so we're not too surprised that upper-level management would want to leave it alone, but that doesn't stop us from wanting to see Chevy's bread-and-butter full-size sedan return to its roots by going rear-wheel-drive.
One thing is for certain: by the year 2012, the W-Body platform of the current Impala will be absolutely ancient. On the other hand, we've had nothing but good things to say about the new Zeta platform which underpins such enthusiast-friendly vehicles as the new Pontiac G8. Therefore, we can at least hold out some hope that GM will find a way to offer as many vehicles as possible using the new chassis architecture, whether they are named Impala or not. Anybody want to see a new Nova?
