JLM09LTZ
Full Member
So, my 09 LTZ has the Z55 package... The compressor works extra hard when I have my landscape trailer hooked up loaded with a yard of mulch. I have already had to replace the compressor once. I was comparing the Moog springs #81069 and #81071. I believe the 89071 was what came with the ZW7 and Z55 package. There was also an option for Moog #89069, but no other spring options. My guess is that the Z55 and ZW7 uses the same rear spring due to them both being load leveling, so the 89069 by default has to be the spring for the Z71. My theory is since the ZW7 and Z55 packages have softer spring rates, the Z71 springs would provide an extra bit of support to alleviate some of the strain on the air bags, but won't be overly stiff when unloaded. My question is, has anyone swapped out their OEM springs for the Z71 springs, if so can you validate or disclaim my theory? Would there be any residual lift as a result? I've read that the Z71 is anywhere from 1" to 1.5" higher than a standard LS/LT/LTZ. Any truth to this? I rarely ever see any GMT900 Z71 Tahoe's/Burban's/Lanche's in my area so I have not been able to visually compare.