According to the owner's manual for the 2006 Buick Lucerne it has a gross trailer weight capacity of 1,000 pounds maximum. It does not say that a transmission cooler is required. However, a transmission cooler is always a good idea, especially when towing, to keep the fluid cooler so the transmission is less likely to get damaged or wear out any faster than normal.
If you do decide to install a cooler the most popular option for models with the 4.6 liter V8 is # D13503. And we also recommend... view full answer...
I went and grabbed a Americana Baby Moon Trailer Wheel Center Cap # AM90086 from our warehouse to measure the depth and I found that the lip of the cover is right at 1/2 inch deep and the overall depth of the entire cover is 2-3/4 inches. view full answer...