View Full Version : How common are the "Z" speed rated NorthStar's

03-19-04, 12:43 PM
Just Curious.

03-19-04, 01:18 PM
Just Curious.

To my recollection all the 93 and 94 STS's were built with Z-rated tires. In fact I think that even 95's had Z rated tires . I believe that the Z-rated tires were an option first in 96....

Only the STS/ETC got the z-rated tires. The standard Seville, Eldorado and Deville got lower speed rated tires and the appropriate speed limit in the PCM for the tires.