factory Heavy Duty Suspension option

pmoorse · January 22, 2005

i recently bought a 2005 silverado 4x2, and it has the Heavy Duty Suspension option, but i can't find anything that says exactly what this includes. anybody know? it's only a $100-200 option, so it can't be anything too heavy duty i assume, but i'm just curious

srsfunk · January 23, 2005

I have that on 4x4 and I'm not sure what the difference is either

potz1999 · January 23, 2005

As far as I know the Z85 (heavy duty suspension) package is just a set of gas-charged shocks. Possibly a rear stabilizer bar, but I have to check on that.

gave20 · January 23, 2005

From GM's website: (Z85) SUSPENSION CHART SPECIFICATIONS

(RPO) Chassis Package Z85 HANDLING/TRAILERING

Customer Benefits Provides increased damping for firmer highway rideand improved handling while trailering.

Content Description Same load carrying capacity springs as Z83

1500 Series - Blue color MonroeShock Absorber Tubes (high pressure gas charged 36mm piston diameter)

Heavy duty engine and transmissions oil cooling capability is provided with internal cooling

Wider aspect ratio tires with greater load carrying capacity than standard Z83

This is the Z83 description:

(Z83) SUSPENSION CHART SPECIFICATIONS

2 DOOR 4x2

(RPO) Chassis Package Z83 SOLID/SMOOTH RIDE

Suspension Type Smooth-Ride

Use/Intent Ride

Primary Road Use Paved

Cargo Capacity Good

Trailering Light-Duty

Ride Smooth

Tire Size P205/75R15

Wheel Size, in. (cm) 15.00 x 7.00 / ( 38.10 x 17.78 )

Shock Absorbers, (mm) 1.26/32

Customer Benefits Provide the control and smooth ride with typical cargo loading of pickup vehicles.

Content Description Standard equipment-all models

Black color shock absorber tubes (low pressure gas charged with 32mm piston diameter)

Includes most fuel efficient tires

Model Availability All 1500 Series

LiftedHDRado · January 28, 2005

From what I know is that the 2500HD has an extra leaf spring than like the 1500HD

1/2 ton vs 3/4=makes sense. I know cuz my last chevy was the 1500HD and i know my new 2500HD sits higher than my 1500HD. I am not sure as far as shocks go.....also i know the exhaust is bigger on the 2500HD......my 2 cents