Light Duty Suspension Products June 2015

Heavy Duty Helper Springs

Chevrolet / GMC

Chevrolet / GMC ¹⁄₂ Ton Rear 4-Wheel Drive Truck

Heavy Duty Helper Springs

Master Kit Includes:

Kit Type

Spring Width

Master Kit No.

Leaf Kit No.

Bracket Kit No.

U-Bolt Kit No.

Model

*Year Capty.

Remarks

510-127A 510-105

K1500

1988-98 2400 1 2 ¹⁄₂ 1985-87 2600 1 2 ¹⁄₂

504-127 503-2119 502-215 H15 504-105 503-2101 502-254

K10/1500, V10/1500 Silverado/Sierra 1500

N/A

1999-07

— — —

— — — No heavy duty kit available. See the Standard Duty section of this publication. — — — No heavy duty kit available. See the Standard Duty section of this publication.

N/A

Silverado/Sierra 1500HD 2002-10

— — —

³⁄₄ Ton Front 4-Wheel Drive Truck

Master Kit Includes:

Kit Type

Spring Width

Master Kit No. 510-402 510-384

Leaf Kit No.

Bracket Kit No.

U-Bolt Kit No.

Model

*Year Capty.

Remarks

K20/2500, V20/2500 K20/2500 pickup & Suburban

1973-87 1000 6 2 ³⁄₄ 1967-72 800 6 2 ¹⁄₂

— — — Tapered extra leaf kit

— — — Tapered extra leaf kit, use w/taper leaf front springs w/std. eyes only.

510-402

Suburban

1973-91 1000 6 2 ³⁄₄

— — — Tapered extra leaf kit

³⁄₄ Ton Rear 2-Wheel Drive Truck

Master Kit Includes:

Kit Type

Spring Width

Master Kit No.

Leaf Kit No.

Bracket Kit No.

U-Bolt Kit No.

Model

*Year Capty.

Remarks

510-105A 510-129

C20/2500, R20/2500

1985-87 2600 1 2 ¹⁄₂ 1988-00 2400 1 2 ¹⁄₂

504-105 503-2101 502-250

C2500HD, 8600 lbs. GVW and over C2500 under 8600 lbs. GVW

504-129 503-2119 502-215 H15, H18

510-127

1988-00 2400 1 2 ¹⁄₂

504-127 503-3119 502-215 H14, H18

N/A

Silverado/Sierra

1999-07

— — —

— — — No heavy duty kit available. See the Standard Duty section in this publication. 500-135 503-2120 502-215 Frame must be factory drilled for OE brackets.

510-149A

Silverado/Sierra 2500HD 2001-10 2600 4 2 ¹⁄₂

³⁄₄ Ton Rear 4-Wheel Drive Truck

Master Kit Includes:

Kit Type

Spring Width

Master Kit No.

Leaf Kit No.

Bracket Kit No.

U-Bolt Kit No.

Model

*Year Capty.

Remarks

510-105A 510-129

K20/2500, V20/2500

1985-87 2400 1 2 ¹⁄₂ 1988-00 2400 1 2 ¹⁄₂

504-105 503-2101 502-250

K2500

504-129 503-2119 502-215 H15, H18

N/A

Silverado/Sierra 2500

1999-07

— — —

— — — No heavy duty kit available. See standard duty section of this publication. 500-135 503-2120 502-215 Frame must be factory drilled for OE brackets.

510-149A

Silverado/Sierra 2500HD 2001-10 2600 4 2 ¹⁄₂

1 Ton Front 4-Wheel Drive Truck

Master Kit Includes:

Kit Type

Spring Width

Master Kit No.

Leaf Kit No.

Bracket Kit No.

U-Bolt Kit No.

Model

*Year Capty.

Remarks

510-402A

K30/3500, V30/3500 (“V” body only)

1977-91 1000 6 2 ³⁄₄

— — — Tapered extra leaf kit

If the Heavy Duty Kit is not available for your application, refer to the "Standard Duty" or "Air Lift" sections of this catalog. See Page 2 for "Remarks Key Chart". N/A - Not Available * For model years earlier then those listed refer to the "Standard Duty" section of this catalog.

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