ACDelco 550-171 | Rear Shock Absorber

Part Number

550-171

Shock Absorber

Fits: 91-02 Chevrolet C3500HD, 91-02 GMC C3500HD, 97-02 Chevrolet Express 3500, 97-02 GMC Savana 3500

$159.11

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Details

Rear Shock Absorber

BRAND: ACDelco

FEATURES:

Air Lift Strut Shock; Air Tube Tee; Compressor Tube Fitting; Coil Spring; Lift Support; Heavy Duty Shock; Monotube Air Lift Shock; Gas Strut Cartridge; Monotube Shock; Shock; Air Fill Valve; Spring Assisted Strut Shock; Stabilizer Bar; Stabilizer Bar Bushing; Stabilizer Shaft; Stabilizer Shaft Clamp; Steering Knuckle; Steering Linkage Shock; Strut Mount; Strut Nut; Strut; Yaw Sensor

SPECIFICS:

ACD_RemanDes	No
Adjustable	No
AltPA_107_mm	357.1
AltPA_108_mm	219.2
AltPA_3042_mm	590.6
AltPA_38_mm	219.2
AltPA_52_mm	50.8
Body Diameter	2
Boot Included	NO
Coil Over Springs Included	No
Compressed Length	14.06
Dust Shield	Yes
FAQ - A1	Yes. Although shocks and struts perform a similar function, they vary greatly in their design. The major difference between shocks and struts is that a strut is a structural part of the vehicles suspension system where a shock is not. A strut is also a crucial part of the vehicles steering system and greatly affects alignment angles.
FAQ - A2	Yes. You should have your vehicle aligned if you are replacing your vehicle's struts. However, it is not necessary to get your vehicle aligned when replacing your vehicle's shocks unless there was a previous issue.
FAQ - A3	Yes. It is important to choose the correct shock or strut for your vehicle model and year, as well as for the location in the vehicle.
FAQ - Q1	Is there a difference between a shock and a strut?
FAQ - Q2	Should I have my vehicle aligned after replacing my shocks or struts?
FAQ - Q3	Do I need different shocks for front, rear, left, or right applications?
Features & Benefits - B1	Helps absorb and dampen road input into your vehicle's suspension
Features & Benefits - B2	GM-recommended replacement part for your GM vehicle's original factory component
Features & Benefits - B3	Offering the quality, reliability, and durability of GM OE
Features & Benefits - B4	Manufactured to GM OE specification for fit, form, and function
Gas Charged	YES
Good Maintenance Practices - S1 B1	Ball joints and other suspension components
Good Maintenance Practices - S1 B2	Brakes
Good Maintenance Practices - S1 B3	Tires
Good Maintenance Practices - S1 H	Your vehicle's shocks slowly deteriorate over time, though this wear is normally difficult to detect. Worn shocks can also cause additional wear to other vehicle components, so to maximize your vehicle's ride comfort, it is recommended to inspect your vehicle's shocks every year. Be sure to always refer to your Vehicle Owner's manual for additional vehicle maintenance practices. Potentially affected components include but are not limited to:
Good Maintenance Practices - S2 B1	Leaking oil or wetness along the body of the shock or strut
Good Maintenance Practices - S2 B2	Broken mounts
Good Maintenance Practices - S2 B3	Broken, damaged, or missing mounting hardware
Good Maintenance Practices - S2 B4	Dented reservoir tube
Good Maintenance Practices - S2 B5	Bent or scratched piston rod
Good Maintenance Practices - S2 B6	Cupped tire wear
Good Maintenance Practices - S2 B7	Damaged spring seat, spring, and spring isolator
Good Maintenance Practices - S2 H	To inspect your shocks to gauge wear, check for:
Lower Mount Type	Eye
Mkt_State_Warranty_CA	Limited Lifetime Warranty (Parts Only). Please see ACDelcocanada.com for more details
Mkt_State_Warranty_US	Limited Lifetime Warranty (Parts Only). Please see ACDelco.com for more details
Product Description	ACDelco GM Original Equipment Shock Absorbers are GM-recommended replacements for your vehicle's original components. Shock absorbers help absorb and dampen road input into your vehicle's suspension, helping provide proper feel and control of your vehicle. These original equipment shock absorbers have been manufactured to fit your GM vehicle, providing the same performance, durability and service life you expect from General Motors. ? WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov
Programming Required	NO
Shock Absorber Body End Measuring Point	Center Eye
Shock Absorber Rod End Measuring Point	Center Barpin
Signs of Wear & Troubleshooting - S1 B1	Vehicle has 'acceleration squat'
Signs of Wear & Troubleshooting - S1 B2	Vehicle does not sit level
Signs of Wear & Troubleshooting - S1 B3	Vehicle steering pulls
Signs of Wear & Troubleshooting - S2 B1	Your ride is harsh, bumpy or shaky
Signs of Wear & Troubleshooting - S2 B2	Your vehicle bounces excessively
Signs of Wear & Troubleshooting - S2 B3	Your vehicle leans or sways while turning
Signs of Wear & Troubleshooting - S2 B4	Your vehicle bottoms out
Signs of Wear & Troubleshooting - S2 H	It could be time to replace your shocks if, when driving on a surface with bumps and/or dips:
Signs of Wear & Troubleshooting - S3 B1	You notice fluid leakage from your vehicle's shocks
Signs of Wear & Troubleshooting - S3 B2	Your vehicle's shocks have dented or heavily scratched housings or mounts
Signs of Wear & Troubleshooting - S3 H	Uneven patches of wear on the edges of your tire can be a sign of weak ride control (shocks or struts). This wear, called cupping, appears as scalloped dips around the surface of the tread. Other signs it could be time to replace your shocks or struts include but are not limited to:
Travel Length	8.63
Upper Mount Type	Bar Pin
Vintage_Part_Indicator	N

EXCEPT RR SPR(9Q4)

DOWNLOADS:

APPLICATIONS:

1991-2002 Chevrolet C3500HD - Position: Rear
1991-2002 GMC C3500HD - Position: Rear
1997-2002 Chevrolet Express 3500 - Position: Rear
1997-2002 GMC Savana 3500 - Position: Rear

Product Questions (7)

Customer Questions

How often should shock absorbers be replaced?

Shock absorbers should generally be replaced every 50,000 miles or every 5-7 years

Does AC Delco make Ford parts?

No, AC Delco produces parts primarily for General Motors vehicles and does not make parts specifically for Ford vehicles.

How to replace shock absorbers?

To replace shock absorbers, you need to remove the wheel and tire assembly, unbolt the old shock absorber, replace it with a new one, and tighten the bolts. Then, reinstall the wheel and tire, and test the new shocks.

Can I use AC Delco parts to replace OEM parts?

Yes, in most cases AC Delco parts can be used as a replacement for OEM parts. However, it's important to ensure that the parts are compatible with your specific make and model of vehicle.

Why do shock absorbers leak?

Shock absorbers can leak due to worn seals, damage to the piston or cylinder, or corrosion from exposure to moisture and road salt.

What AC Delco oil filter do I need?

AC Delco offers a variety of oil filters that are compatible with different makes and models of vehicles. To determine which AC Delco oil filter you need, consult your vehicle's owner's manual or use our online filter lookup tool that matches the make, model, and year of your vehicle.

Can shock absorbers be replaced?

Yes, shock absorbers can be replaced when they start to wear out or fail.