Not part of the VIN. It is on the SPID sticker on the trunk lid.I assume it is part of the vin but what is a B4U package?
Nope my sons didn't have an oil coolerone electric fan and one mechanical fan driven via vbelt
bigger alternator
oil and trans cooler
You are correct, B4U's do not have the 9C1-like oil coolers.Nope my sons didn't have an oil cooler
Actually B4U is the Sport Performance Package and V92 is Trailering Provision.V92 is the 'trailering package' option.
B4U is the 'sport suspension' option.
Both required, among several other things, the LT1 engine. I'll admit I've never personally seen one without the other, but they are two different things.