Home / Shop / ReadyLift Suspension Lift Kits 42-31540 Kit, 5.0 to 6.0 in., Steering Knuckle, Leaf Spring Block, Falcon 2.1 Shocks, GMC, Chevy, Kit

ReadyLift Suspension Lift Kits 42-31540 Kit, 5.0 to 6.0 in., Steering Knuckle, Leaf Spring Block, Falcon 2.1 Shocks, GMC, Chevy, Kit

SKU: RLS42-31540

Suspension Leveling & Lift Kits

Readylift Suspension

ReadyLift Suspension Lift Kits 42-31540 Kit, 5.0 to 6.0 in., Steering Knuckle, Leaf Spring Block, Falcon 2.1 Shocks, GMC, Chevy, Kit

SKU: RLS42-31540

Suspension Leveling & Lift Kits

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Description

ReadyLift Suspension lift kits provide front and rear lift solutions to boost your vehicle's stance. They offer a huge selection of kits to give your truck, Jeep, or SUV just the right posture and attitude you are looking for. ReadyLift SST (Smart Suspension Technology) lift kits are the original mid-lift solutions for those who want more than what a leveling kit offers, but less overall height than that of a big lift. And for those of you wanting that BIG lift, they have complete kits that provide maximum lift and aggressive style. So whether you want a little or a lot, "Just don't lift it … ReadyLift it!"

Part Type

Suspension Leveling & Lift Kits

Data: v4.2 - Upd: 2026-09-29 18:23:51

Specifications

Product Attributes - Brand: ReadyLift Suspension
Product Attributes - Manufacturer's Part Number: 42-31540
Product Attributes - Part Type: Suspension Leveling & Lift Kits
Product Attributes - Product Line: ReadyLift Suspension Lift Kits
Product Attributes - UPC: 194933366439
Product Attributes - Lift Style: Suspension Lift Kit
Product Attributes - Primary Front Lift Component: Steering knuckle
Product Attributes - Primary Rear Lift Component: Leaf spring block
Product Attributes - Front Shocks/Struts Included: Yes
Product Attributes - Front Shock Quantity Per Wheel: 1
Product Attributes - Front Shock Type: Single adjustable
Product Attributes - Rear Shocks/Struts Included: Yes
Product Attributes - Rear Shock Quantity Per Wheel: 1
Product Attributes - Rear Shock Type: Single adjustable
Product Attributes - Brake Lines Included: No
Product Attributes - Hardware Included: Yes
Product Attributes - FMVSS 126 Certification: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Not designed to work on single cab options.

Reference Information

Brand Name/s	Readylift Suspension
StreetFX SKU	rls42-31540
SFX Item ID	5008877
Supplier Item Code	5008877
Manufacturer SKU	42-31540
Manufacturer UPC	194933366439

Compatibility

Application Data

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2011
Ending Year	2012
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2011
Ending Year	2014
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2011
Ending Year	2014
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2011
Ending Year	2014
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2011
Ending Year	2014
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	WT
Beginning Year	2013
Ending Year	2014
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	WT
Beginning Year	2013
Ending Year	2014
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2013
Ending Year	2016
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2015
Ending Year	2016
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2015
Ending Year	2019
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2018
Ending Year	2019
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLE
Beginning Year	2015
Ending Year	2012
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2015
Ending Year	2012
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2017
Ending Year	2012
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2017
Ending Year	2019
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	BASE
Beginning Year	2018
Ending Year	2019
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	BASE
Beginning Year	2018
Ending Year	2016
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2011
Ending Year	2016
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2015
Ending Year	2016
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2011
Ending Year	2014
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2017
Ending Year	2019
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2017
Ending Year	2016
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2018
Ending Year	2019
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	SLT
Beginning Year	2018
Ending Year	2019
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Drivetrain	4WD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

Make	GMC
Model	SIERRA 3500 HD
Submodel	DENALI
Beginning Year	2017
Ending Year	2012
Engine Type	V8
Engine Size	6.6L/403
Engine Family	DURAMAX V8 DIESEL
Drivetrain	RWD
Amount of Lift Front	5.000-6.000 in.
Amount of Lift Rear	5.000-6.000 in.
Maximum Tire Height (in.)	35 in.
Maximum Tire Width (in.)(application)	12.5 in.
Recommended Wheel Width (in.)	9.00 in.
Application Notes	This suspension lift kit is not designed to work with single cabs applications.

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ReadyLift Suspension Lift Kits 42-31540 Kit, 5.0 to 6.0 in., Steering Knuckle, Leaf Spring Block, Falcon 2.1 Shocks, GMC, Chevy, Kit

ReadyLift Suspension Lift Kits 42-31540 Kit, 5.0 to 6.0 in., Steering Knuckle, Leaf Spring Block, Falcon 2.1 Shocks, GMC, Chevy, Kit

Description

Part Type

Specifications

Reference Information

Compatibility

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