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For GMC Sierra pickup trucks back in the old-body style late 1990s (1996, 1997, 1998) (not the new-body-style and more recent from 1999 onwards), what features made up the Z71 package? I always thought the off road package entailed four wheel drive, but in looking at classifieds, some Z71's seem to be 2WD, not 4WD. I suppose the suspension was different. How about the differentials? What else?

Franky
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As explained here, lots of people add aftermarket Z71 stickers to their truck to artificially increase the value. If the truck truly is a Z71, it would be listed on the RPO ("regular production options") sticker, which I believe is in the glove box for the Sierra.

The real Z71 package had the following (copied from the link):

  • Z71 Off-Road suspension
  • 46mm twin-tube high-pressure gas-charged shocks
  • Skid Plate Package with a frame-mounted shield
  • GM segment-exclusive automatic locking rear differential that provides added grip when you need it
  • Available Z71 Appearance Package: 18" aluminum wheels, body-color mirrors and door handles, body-color grille with chrome insert, and Rancho® shocks
tlhIngan
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Here's a different source for a different answer.

This seems to refer to the late 90's models and lists a different suspension and some skid plates. They do specifically list the differential as being a standalone option, and I've seen (Toyota) pickups marked as off-road but only had 2WD, and it was FWD too. Again, check the RPO sticker to make sure it really is a Z71 and not just an aftermarket sticker on the side of the truck.

tlhIngan
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