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Dorman 22-603HD Leaf Spring Assembly - RearOE Quality 60-Day Returns
Part #: 22-603HD

Dorman 22-603HD Leaf Spring Assembly - Rear

Rear
30 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet and GMC, P30 and P3500
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Durable Leaf Spring Assembly for Chevrolet and GMC Trucks

The Dorman 22-603HD leaf spring assembly is engineered to provide reliable suspension support for heavy-duty applications. Designed specifically for Chevrolet P30 and GMC P3500 models, this steel leaf spring assembly offers consistent load handling and durability.

  • Constructed from high-quality steel (acero) for strength and longevity
  • Heavy-duty suspension grade with a 4500 lb load rate capacity
  • Includes 11 leaves with a 2.5-inch leaf width for balanced support
  • Black bushings included to reduce noise and wear
  • Rear axle orientation designed for direct fit without axle modification
  • Leaf spring arch length of 4.25 inches and pack thickness of 59 mm

Product Details and Specifications

The Dorman 22-603HD leaf spring assembly is built to meet the demands of heavy-duty suspension systems on Chevrolet P30 and GMC P3500 trucks. Featuring 11 individual steel leaves, this assembly provides a 4500 lb load rate, making it suitable for vehicles requiring robust rear suspension support. The black bushings included help minimize vibration and extend the lifespan of the assembly. With a 2.5-inch leaf width and a 4.25-inch arch length, this leaf spring maintains proper ride height and axle alignment. The assembly is designed for rear axle orientation and requires no axle modification for installation.

Common Applications and Problem Solving

  • Restores sagging or worn rear suspension on Chevrolet P30 and GMC P3500 trucks
  • Improves load carrying capacity for heavy-duty hauling and towing
  • Reduces rear axle movement and improves vehicle stability
  • Replaces damaged or broken leaf springs to maintain proper ride height
  • Addresses uneven tire wear caused by suspension issues

Installation Notes and Tips

This leaf spring assembly is designed for direct replacement on compatible Chevrolet P30 and GMC P3500 models without requiring axle modifications. Ensure the vehicle is properly supported and the suspension is unloaded before removal. Although bushings are included, mounting hardware is not, so verify existing hardware condition or acquire new hardware as needed. Proper torque specifications should be followed during installation to maintain safety and performance.

Quality Assurance and Warranty

Dorman manufactures the 22-603HD leaf spring assembly to meet industry standards for heavy-duty suspension components. The steel construction and included bushings contribute to long service life under demanding conditions. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.

BrandDorman
Part Number22-603HD
MaterialAcero
MaterialSteel
Bushing ColorBlack
Bushing ColorNegro
Bushing ColorNoir
ColorBlack
ColorNegro
ColorNoir
Load Rate4500
Suspension Grade TypeHeavy duty
Suspension Grade TypePara uso pesado
Leaf Quantity11
Leaf Width2.5
Axle OrientationArrière
Axle OrientationRear
Axle OrientationTrasero
Helper SpringNo
Helper SpringNon
Axle Modification NeededNo
Axle Modification NeededNon
Bushings IncludedOui
Bushings IncludedSí
Bushings IncludedYes
Mounting Hardware IncludedNo
Mounting Hardware IncludedNon
Length Axis 126
Length Axis 226
Pack Thickness59
Leaf Spring Arch Length4.25
Spring Research Institute Number22-603hd

This part fits 30 vehicles. Search below:

YearMakeModelPositionNotes
1991ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Exc. Low Profile Chassis; Heavy Duty Aftermarket Design
1991GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Exc. Low Profile Chassis; Heavy Duty Aftermarket Design
1990ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1990GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1989ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1989GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1988ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1988GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1987ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1987GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1986ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1986GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1985ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1985GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1984ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1984GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1983ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1983GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1982ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1982GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1981ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1981GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1980ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1980GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1979ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1979GMCP3500Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1978ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1977ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JF9 (Hydraulic 4 Wheel Disc Brakes); Heavy Duty Aftermarket Design
1976ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JB9 (15 x 4 Rear Drum Brakes); Heavy Duty Aftermarket Design
1975ChevroletP30Rear10 Leaf / 1 Leaf = 11 Leaf Spring; 5 In. Pack Thickness; 4,500 Lb. Average Capacity; w/RPO Code JB9 (15 x 4 Rear Drum Brakes); Heavy Duty Aftermarket Design

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

022-0603-00HD22-603HD22-603HDDAY45-082

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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