welcome to the forums.
Many of us use the Chev and I am happy with mine- it lumbers and sways especially at speeds above 70 & crosswinds..but it weighs 9000#'s
I recently replaced my tires with the michelin agilis- there is a thread
for my shocks I posted this ( in the end bought at tirerack.com ended up at $83 each shock) ( 2 posts):
for my 2005 Chev 3500 chassis 2006 Pleasure-Way Lexor TD I am looking at 4600 series:
Bilstein 24-187435 @ $91 each for front
Bilstein 24-221948 @ $86 each for rear
my stock height is fine so I'm not looking for a change- PW doesn;t have a drop floor
and this on the install
Shock swap in the driveway took about 3 hours for the van- I did this leaving the wheels on.
2005 Chev 3500 chassis
for the fronts, I put the front of the van up on ramps and removed the top bolts through the fender wells ( 15mm & holding the top of the spindle with vise grips) and then removed the 2 lower bolts (13mm socket), slide out the old shock.
new one goes in with lower top bushing in place.
a small scissor jack was used on the bottom of the shock to collapse it and allow the bolts ( blue locktite) to be inserted- I ran the bolts up with my dewalt, and then a ratchet to about 25 ftlbs.
top bushing and nut go on to tight- about 20 ft lbs
repeat other side
for the rears, this required getting under van-on all 4 wheels.
I used a jack to get the rear of the van up to give enough clearance to slide myself under- and then jackstands under the frame rails- of interest, the drivers side frame rails have a guard for the fuel tank- placing a jack or stands requires picking a spot.
the lower bolts were removed with 2 sockets, 15mm and 18mm, sliding farther under ( or coming in from the side just in front of the rear wheels) the top bolts ( 2 each side) can be reached- 13mm socket w/ long extension. once loosened I used the dewalt to run them down.
put new shock in place with blue locktite on the bolts to about 20 ft pounds, and use the little scissor jack to collapse and get the mount in place- bolts in and tightened to about 30 ft lbs
not a tough job at all- probably an hour of this was gathering the jacks, stands and determining which wrenches i needed...crawling in and out a few times ...going back for another extension or realizing the dewalt would save a bunch of time.
I'll have a better idea of result when I take a trip, but just a quick spin around the neighborhood shows a nice solid feel with little effect felt from manhole covers or other small ripples.
I also did my 2001 gmc sierra this weekend and it is super solid feeling on the road.
but then anything would be better than worn shocks!
total cost both vehicles $604