Hijack/Rant on:
Billy,
I have 8 shocks, 4 front and 4 rear, all had less than 40k miles when removed from the VXs.
All 8 of them are shot -they can be easily compressed/extended by hand. This means they have no dampening ability for either compression or rebound. Two show obvious evidence of fluid leakage and I assume they all have lost their gas charge as well.

90,000 miles is a long way on any shocks -especially ones that receive the punishment that yours have. I'll bet if you pull them off and take them to a shop with a shock dyno (or at least some decent testing equipment) they will ALL be dead.

I've fantasized about rebuilding these things/restoring these things/replacing these things for some time, but the bottom line is:
NO MATTER HOW FANCY THEY LOOK, THEY ARE NOT WORTH THE $400+ that Isuzu insists that they are (this is part of the reason that dealers are hesitant to replace them under warranty). I can get a superior quality, rebuildable, and adjustable aftermarket unit for less than half of Isuzu's asking price. Why shouldn't I?

Side note: On Friday the 26th, I'll be back in Ohio and I will be dumping all 8 of these OEM shocks on my service manager's desk. If anyone wants these paperweights, please tell me now and I'll box them up for you.

Hijack off

Despite my frequent gripes about the VXs, I (and my wife) love them dearly. My biggest problem with the VX is the manufacturer. I suppose that I have a case of reverse-Mauganism: I won't be satisfied until I've removed all possible traces of Isuzu from my truck. The wife, on the other hand, prefers her stock, badged, factory CD changer'd, Bridgestone wearing, still has the original "Do not wipe..." and "OK Isuzu" sticker'd VehiCROSS. To each their own, but I'll be dipped if I let her drive around on the OEM KYB 'shocks'.