Help Please- Suspension RPO Code

[tjmclea]

I could not find a shock that showed the Z85 RPO code for 2015 on RockAuto. I jumped up to 2016 and found the 540-1721 listed. Looking at the 540-1721 vs the 540-1675 they look to be almost identical. Compressed length, and fully open length are identical. There are some discrepancies in weight, height, and width, but I am hoping that must be packaging information for the service part in the box. I guess I will see when I get them in a few days if they are going to work for me or not... If they don't I will order up the 540-1675...

	540-1721	540-1675
Package Dimensions	26.2 x 6.0 x 6.0 inches	26.2 x 6.0 x 6.0 inches
Package Weight	6.73 lb	7.01 lb
Package Quantity	1	1
Adjustable	Yes	Yes
Boot Included	No	No
Coil Over Springs Included	No	No
Color	Black	Black
Compressed Length	15.55 IN	15.55 IN
Dust Shield	No	No
Fully Open Length (in)	22.76 in	22.76 in
Gas Charged	No	No
Height	5.8 IN	3.8 IN
Length	26.1 IN	20.4 IN
Lower Mount Type	Eyelet	Eyelet
Programming Required	No	No
Shock Absorber Body End Measuring Point	Center Eyelet	Center of Eye Ring with Bushing
Shock Absorber Rod End Measuring Point	Center Eyelet	Center of Eye Ring with Bushing
Travel Length	7.2 IN	Not Listed
Upper Mount Type	Eyelet	Eye Ring with Bushing
Weight	7.01 LB	7.01 LB
Width	5.8 IN	4.9 IN
Country of Origin	CA	CA

 

[tjmclea]

Update!! The 540-1721 shocks worked perfectly. I was surprised at how easy it was to swap these out even with 120k miles of Minnesota road salt this rig has seen.

Those salt miles are definitely visible on the old shocks as well. Honestly impressed they lasted as long as they did, as they appear to be the original shocks.


Thanks for all of the responses and input given. It’s refreshing to get some solid support on an online forum.