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Heavy Duty Helper Springs
Heavy Duty Helper Springs
Chevrolet / GMC
¹⁄₂
Ton Rear
4-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
K1500
1988-98 2400 1 2
¹⁄₂
510-127A
504-127 503-2119 502-215 H15
K10/1500, V10/1500
1985-87 2600 1 2
¹⁄₂
510-105
504-105 503-2101 502-254
Silverado/Sierra 1500
1999-07
— — —
N/A
— — — No heavy duty kit available. See the
Standard Duty section of this publication.
Silverado/Sierra 1500HD 2002-10
— — —
N/A
— — — No heavy duty kit available. See the
Standard Duty section of this publication.
³⁄₄
Ton Front
4-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
K20/2500, V20/2500
1973-87 1000 6 2
³⁄₄
510-402
— — — Tapered extra leaf kit
K20/2500 pickup &
Suburban
1967-72 800 6 2
¹⁄₂
510-384
— — — Tapered extra leaf kit, use w/taper leaf front
springs w/std. eyes only.
Suburban
1973-91 1000 6 2
³⁄₄
510-402
— — — Tapered extra leaf kit
³⁄₄
Ton Rear
2-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
C20/2500, R20/2500
1985-87 2600 1 2
¹⁄₂
510-105A
504-105 503-2101 502-250
C2500HD, 8600 lbs. GVW
and over
1988-00 2400 1 2
¹⁄₂
510-129
504-129 503-2119 502-215 H15, H18
C2500 under 8600 lbs.
GVW
1988-00 2400 1 2
¹⁄₂
510-127
504-127 503-3119 502-215 H14, H18
Silverado/Sierra
1999-07
— — —
N/A
— — — No heavy duty kit available. See the Standard
Duty section in this publication.
Silverado/Sierra 2500HD 2001-10 2600 4 2
¹⁄₂
510-149A
500-135 503-2120 502-215 Frame must be factory drilled for OE
brackets.
³⁄₄
Ton Rear
4-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
K20/2500, V20/2500
1985-87 2400 1 2
¹⁄₂
510-105A
504-105 503-2101 502-250
K2500
1988-00 2400 1 2
¹⁄₂
510-129
504-129 503-2119 502-215 H15, H18
Silverado/Sierra 2500
1999-07
— — —
N/A
— — — No heavy duty kit available. See standard
duty section of this publication.
Silverado/Sierra 2500HD 2001-10 2600 4 2
¹⁄₂
510-149A
500-135 503-2120 502-215 Frame must be factory drilled for OE
brackets.
1 Ton Front
4-Wheel Drive Truck
Model
*Year Capty.
Kit
Type
Spring
Width
Master
Kit No.
Master Kit Includes:
Remarks
Leaf
Kit No.
Bracket
Kit No.
U-Bolt
Kit No.
K30/3500, V30/3500 (“V”
body only)
1977-91 1000 6 2
³⁄₄
510-402A
— — — 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.
Chevrolet / GMC