The 2001 GMC Savannah box truck is a workhorse for many businesses, and its suspension system is critical for handling heavy loads and road conditions. When it’s time to replace worn components, using OEM (Original Equipment Manufacturer) parts ensures correct fit, durability, and performance. But finding the right part numbers can be confusing due to variations in GVWR, wheelbase, and cab configuration. This guide provides common OEM suspension part numbers for the 2001 GMC Savannah box truck, along with tips to verify compatibility for your specific vehicle.
Understanding the 2001 GMC Savannah Suspension System
The 2001 GMC Savannah box truck typically uses a front independent coil-spring suspension and a rear leaf-spring solid axle. The suspension system includes shocks, struts, control arms, ball joints, sway bars, springs, bushings, and related hardware. Because the Savannah is often converted to a box truck, the rear suspension may have additional leaves or helper springs to handle higher payloads.
Front Suspension Components
- Shock absorbers: Front shocks dampen vertical motion. For the 2001 Savannah, the OEM front shock absorber is typically an ACDelco unit. Common part numbers include ACDelco 580-410 for standard applications and 580-411 for heavy-duty or ZW7 (smooth ride) suspensions.
- Lower control arms: These connect the frame to the steering knuckle. OEM part numbers often start with 2606xxxx. For a 2001 GMC Savannah 2500 or 3500, the left lower control arm may be 26060014 and the right 26060015.
- Upper control arms: Less common, but if equipped, part numbers like 26060016 (left) and 26060017 (right) may apply.
- Ball joints: Pressed into the control arms. OEM ball joints are sold separately; typical numbers are 45K0009 for the upper and 45K0010 for the lower.
- Coil springs: Front coil spring part numbers vary by GVWR. For a 2500 series, spring code might be 5260xxx. Dealer lookup is best.
- Stabilizer bar links: Links connecting the sway bar to the control arm. OEM part number 88890310 is common for the front.
Rear Suspension Components
- Shock absorbers: Rear shocks for the 2001 Savannah are typically ACDelco 580-415 for standard payload and 580-416 for heavy-duty or road-sensing suspension.
- Leaf springs: Rear leaf springs are rated by capacity. For a 3500 box truck, a 6-leaf spring pack might have number 15712750. Helper springs (add-a-leaf) may be a GM accessory with number 12496824.
- U-bolts: These secure the axle to the leaf spring. Common size for 3-inch axle: part number 11461379.
- Spring shackles and bushings: Shackle kit part number 88971869 includes bushings and pins.
- Sway bar & links: If equipped, rear sway bar part number is 15842987, with link kit 88890311.
OEM Suspension Part Numbers for 2001 GMC Savannah Box Truck
Below are the most commonly referenced OEM suspension part numbers for the 2001 GMC Savannah. Note that these apply to 1500/2500/3500 models, and discrepancies exist due to wheelbase and body style.
Front Suspension Part Numbers
| Component | OEM Part Number (ACDelco or GM) | Notes | |-----------|---------------------------------|-------| | Shock absorber – standard | 580-410 (ACDelco) | Use for 2500; check VIN | | Shock absorber – heavy duty | 580-411 (ACDelco) | For 3500 or ZW7 | | Lower control arm – left | 26060014 (GM) | Includes ball joint? Sold separately | | Lower control arm – right | 26060015 (GM) | | | Upper control arm – left (if equipped) | 26060016 (GM) | | | Upper control arm – right (if equipped) | 26060017 (GM) | | | Ball joint – upper | 45K0009 (ACDelco) | | | Ball joint – lower | 45K0010 (ACDelco) | | | Stabilizer bar link kit | 88890310 (GM) | Front only | | Coil spring – front | Varies by GVWR | Use VIN to decode RPO codes |
Rear Suspension Part Numbers
| Component | OEM Part Number | Notes | |-----------|-----------------|-------| | Shock absorber – standard | 580-415 (ACDelco) | For standard leaf springs | | Shock absorber – heavy duty | 580-416 (ACDelco) | For heavy load or road sensing | | Leaf spring assembly – 6-leaf | 15712750 (GM) | Common for 3500 box truck | | U-bolt kit (3-inch axle) | 11461379 (GM) | Set of 4 | | Shackle & bushing kit | 88971869 (GM) | | | Rear sway bar kit | 15842987 (GM) | If originally equipped | | Sway bar link kit | 88890311 (GM) | | | Helper spring kit (add-a-leaf) | 12496824 (GM) | |
How to Verify Part Numbers for Your Specific Truck
Since the 2001 GMC Savannah box truck was built on a chassis that may have been cut and modified, parts can differ from stock specifications. Always confirm fitment before ordering.
Using the VIN
The Vehicle Identification Number (VIN) encodes the model, GVWR, engine, and suspension RPO codes. You can decode the VIN with a free online tool check or through a GM dealer. The 8th character (engine) and 10th character (year) are standard, but the GVWR and suspension codes are in positions 6-7 and on the service parts label. Look for RPO code ZW7 (smooth ride), ZW3 (heavy duty), or ZW5 (handling).
Checking Existing Parts
If you still have the original parts, they often have stamped part numbers. Remove a shock or control arm, and look for a GM or ACDelco number. This is the most reliable method. For leaf springs, measure the arch and count leaves, then cross-reference with GM catalog.
Consulting a Dealer or Parts Catalog
A GM dealer can run your VIN and provide the exact part numbers. They can also tell you if supersessions have occurred. Online parts catalogs from ACDelco or GM Parts Direct allow VIN lookup. Enter your VIN to see factory-original parts.
Tips for Ordering OEM Suspension Parts
- Check supersessions: Many OEM parts have been updated. ACDelco frequently updates shock part numbers. For example, 580-410 may now be 580-410G (gas charged). Always use the latest number unless you prefer the original spec.
- Buy complete kits: For control arms, consider buying the arm with a ball joint pre-installed. GM offers these as “control arm assembly” for easier replacement.
- Inspect mounts and hardware: Always replace all bushings, bolts, and nuts when changing suspension parts. OEM hardware kits are available.
- Beware of aftermarket “OEM” claims: Parts labeled “OEM quality” may not meet the same tolerances. Stick with genuine GM or ACDelco for exact fit.
- Consider the load: If your box truck carries near maximum GVWR, upgrade to heavy-duty shocks and springs. The OEM heavy-duty part numbers listed above handle higher loads.
Final Recommendation
For a 2001 GMC Savannah box truck suspension, the most critical parts to replace with OEM are the shock absorbers and control arms because they directly affect ride safety and alignment. Start by identifying your VIN and the GVWR. For the front, order ACDelco shocks (580-410 or 580-411) and control arms (26060014/26060015) if needed. For the rear, choose ACDelco shocks (580-415/580-416) and inspect leaf springs for sagging. Use the part numbers in this guide as a starting point, but always confirm with your VIN at a GM dealer or trusted parts website. Investing in OEM ensures your box truck stays on the road with dependable suspension performance.