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Discussion Starter #1
I'm looking for an 03-06 Silverado 4X4 and I've come across a pair of Z71s that I like.

That being said - I absolutely have to have a truck that has the towing package (3.73 rear gear, etc).

Do all Z71s have the towing package?

If not - what are some tell/tell signs that a truck has the towing package?

Thanks in advance guys! :D
 

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Discussion Starter #3
Interesting. Thank you for the reply!

What is the best way to check gear ratio while the truck is sitting on a dealer's lot?
 

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The RPO codes will always be in the glovebox:

GU5: 3.23
GU6: 3.42
GT4: 3.73
GT5: 4.10
G80: rear locker
GQ1: open differential

There's probably a code for the towing package too, I'm just not sure what it is.
 

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JetBlue
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I think Z85 is the towing pkg.

Edit:
VR4 : TRAILER HITCH, WEIGHT DISTRIBUTING PLATFORM
Z85 : CHASSIS PACKAGE, HIGH PAYLOAD FIRM RIDE

-bZj
 
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