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G-Series 4x4 Conversions
Parts
In this section, you will find a list of our available parts for GM 4x4 conversions. Please click the tabs above for more info and resources.
Info
The Chevrolet Express / GMC Savana platform is an excellent choice for 4x4 van conversions. The body on frame design is widely available and still produced today.
The setup is ideal for IFS suspension conversion which gives these vans comfortable drivability akin to a factory 2WD van.
They are inexpensive to work on, extremely durable, and parts are widely available. Timberline offers 2 lift variants of this conversion, a 1-2.5" suspension lift and a 6" lift option.
Unlike the Econoline, the G-Series van is offered in 2 wheelbases, 138" and 158". The long-wheelbase version can be a little more challenging to park. The G-series is not available with a high top from the factory. Cab and chassis models obviously open up box-truck type options.
Options
-We currently have conversion options for the 2003-2021 G2500, G3500, and G4500 series models. (We do not offer a 4x4 conversion for 1/2 ton models)
-Transmission options are limited to the 4L80, 6L90, and 8L90 variants. We have not attempted to convert the 4L60 to 4x4, found on some earlier 2500 models. All Timberline GM transmission options can be completed without the removal of the transmission from the vehicle.
-If completed properly, a standard lift option conversion should drive nearly identical to the van prior to conversion. 6" lift variants will drive very very well, however raising the center of gravity and installing 34" tires on anything will change the vehicle behavior to some degree. (Cool factor + clearance increases substantially more than ride quality degradation, if you want the lift, get the lift.)
Difficulty
-The GM IFS 4x4 torsion bar conversion is slightly more invasive than the Ford E-series, however, we have worked very hard to produce an easily repeatable, reliable 1-way solution that works every time.
-The GM IFS conversion requires cutting and some welding. It is meant to be completed in a shop and with both automotive and some light fabrication experience. Everything is very straightforward and basically only fits one way, so if you can follow simple instructions with clear photos, you'll be fine. A plasma cutter is not required, however, it does make some of the work go more quickly.
Resources
Please visit our "how do I convert my van to 4x4" page for a good overview of the options, process, and budgeting.
Filters
- Engine (30)
- Engine_6.2 (Ford) (1)
- Ford E-Series (5)
- Part Type (30)
- Transmission_4L80 (28)
- Transmission_4R70/75 (4)
- Transmission_5R110 (4)
- Transmission_6L90 (27)
- Transmission_6R140 (4)
- Transmission_8L90 (22)
- Transmission_E40D/4R100 (4)
- Vehicle Make_GMC/Chevrolet (29)
- Vehicle Model_E-150 (4)
- Vehicle Model_E-250 (4)
- Vehicle Model_E-350 (4)
- Vehicle Model_E-450 (5)
- Vehicle Model_G3500 (30)
- Vehicle Model_G-2500 (30)
- Vehicle Model_G-4500 (30)
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Superbeef Roof Rack Bracket System GM+Ford
Timberline SupplyDescription: The Timberline Superbeef roof rack bracket system is the perfect solution for mounting your custom-built roof rack on your full-size ...
View full detailsGM Van 4x4 Core Conversion Kit Standard Lift
Timberline SupplyDescription: This is the Timberline core components kit required to convert your 2500 or 3500 series GM van to 4-wheel-drive. We have worked dilig...
View full detailsGM Van 4x4 Turnkey Conversion Kit Standard Lift
Timberline SupplyPlease visit our FAQ and Build pages if you have not already. They genuinely have good information that will aid your decision making and project...
View full detailsGM Van 4x4 IFS Front Differential Mounting System - Standard Lift
Timberline SupplyDescription: This kit includes the basic components, templates, and bracketry required to hang a 4x4 IFS GM front differential from your 2003-2023 ...
View full detailsHi Clearance GM Center Link ($125 core)
Timberline SupplyDescription: This high-clearance GM van center link is specially designed to address clearance issues with the steering linkage in 4x4 conversions,...
View full details6L90 Manual Transfer Case Shifter Kit
Timberline SupplyDescription This is a bolt-up manual transfer case shifter for the 6L80 transmission found in many GM pickups and vans. Our shifter is designed to...
View full detailsGM G-series 4x4 Conversion Rear Lift Kit
Timberline SupplyDescription: Our GM G-series rear lift kit is a solid solution for lifting the rear of your GM van. This kit is compatible with 2003-current 1500/...
View full detailsEasy-wire GM 4x4 hub lock + Indicator Kit
Timberline SupplyDescription: The Easy-wire GM 4x4 hub lock + indicator kit is a stand-alone wiring system designed to activate the front hub lock motor and LED ind...
View full detailsGM 4x4 van Sway Bar Kit
Timberline SupplyDescription: Our GM 4x4 van sway bar kit simplifies the process of repositioning your sway bar and links when converting your van to 4x4. Switching...
View full detailsShock Adapter Eyelet to Bar Style
Timberline SupplyDescription: This Eyelet-to-bar style adapter bracket can be used to retain your original van front shocks during your 4x4 conversion or our recomm...
View full detailsHub Spacer Kit 2WD to 4x4 Adapter Rings
Timberline SupplyDescription: Our CNC-cut powder-coated hub spacer is a key component of GM 4x4 van conversions where the original van knuckles are retained. These ...
View full detailsGM 4x4 Van Bump Stop Kit
Timberline SupplyDescription: The GM 4x4 van bump stop kit is crucial for optimizing GM IFS system performance in your 4x4 van conversion. We offer three options: 0...
View full detailsTimberline Helper Kit
Timberline SupplyDescription: Are you building a 4x4 van? Let us help you with the consumables. Drawing on our experience of hundreds of 4x4 conversions, these are ...
View full detailsGM 4x4 Van Torsion Bar Carriage System
Timberline SupplyDescription: This torsion bar carriage and transmission/t-case cross-member is designed for use in 2500 + 3500 series Chevy Express and GMC Savana ...
View full detailsEasy-Wire Transfer Case Range LED Indicator Kit
Timberline SupplyDescription: Take the head-scratching out of wiring up the indicator for your transfer case. This is our Easy-Wire kit that cuts way down on time t...
View full detailsGM 4x4 5" Turn-key Hi-Lift Torsion Bar Conversion Kit
Timberline SupplyPlease visit our FAQ and Build pages if you have not already. They genuinely have good information that will aid your decision making and project ...
View full details9.25 IFS AAM Rebuilt Front Differential
Timberline SupplyDescription: The AAM 9.25 IFS axle was used in GM K-series trucks from 1988-2010. It features a lightweight cast aluminum housing and has 33 splin...
View full detailsNP261 Rebuilt Transfer Case for 4x4 Van Conversions
Timberline SupplyDescription: The NP261 was built by New Process (New Venture) and is a reliable chain-driven transfer case used primarily in Chevrolet and GMC veh...
View full detailsGM G-series Adjustable Upper Control Arms
Timberline SupplyDescription: These are adjustable upper control arms for the Chevy Express and GMC Savana Van 2500/3500/4500 series vans from 2003-current. Our con...
View full detailsGM 4x4 Conversion Over The Counter Essentials Kit
Timberline SupplyDescription: This kit comprises the over-the-counter components necessary to complete our standard and Hi-Lift 4x4 torsion bar conversions on mos...
View full detailsGM Full Size 4x4 Conversion Custom Rear Driveshaft
Timberline SupplyDescription: We offer custom-built 1-piece driveshafts for 4x4 van conversions completed using our products. There is a good bit of variability in...
View full detailsGM Full Size 4x4 Conversion Custom Front Driveshaft
Timberline SupplyDescription: We offer custom-built driveshafts for 4x4 van conversions completed using our products. There is a bit of variability in the lengths ...
View full detailsGM 4x4 Conversion Hi-Lift Knuckles
Timberline SupplyDescription: These are our GM Hi-Lift Knuckles for Chevy Express and GMC Savana full-size vans. These knuckles are several inches taller than the c...
View full detailsGM 4x4 Conversion Hi-Lift Carriages & Skid Plate System
Timberline SupplyDescription: This is our Hi-Lift drop carriage and skid plate system for GM 2500, 3500 & 4500 series vans, years 2003-current. This setup lower...
View full detailsGM HD Center link & tie rods for Hi-lift vans
Timberline SupplyDescription: This high-clearance GM van center link is a modified version of the original center link found in your van. It has been re-engineered ...
View full detailsGM 4x4 Van Hi-Lift Front Limit Strap Kit
Timberline SupplyDescription: Introducing our Front Limit Strap Kit for Hi-Lift 4x4 GM conversion vans. These limit straps are vital to protecting shocks and coilov...
View full detailsGM 4x4 Van Conversion Hi-Lift Sway Bar Link Kit
Timberline SupplyDescription: The Hi-Lift sway bar link kit integrates perfectly with our designs and geometry for the 5"-6" lifted GM vans. These over-size extende...
View full details8L90 Bolt-Up 4x4 Conversion Kit
Timberline SupplyDescription: This is the component kit required to convert a 2-wheel drive 8L90 transmission to 4x4. This conversion can be performed in-vehicle wi...
View full details8.25 IFS AAM Rebuilt Front Differential
Timberline SupplyDescription: Variations of the 8.25" front AAM carrier have been used in full size GMC vehicles since 1988. These are common in 1/2 ton Silverados...
View full details6" Superbeef Anti-Wrap Ultra Heavy Duty Lift Block Kit
Timberline SupplyDescription: Lift block options for heavy rigs are just very limited when you start looking at 5" or more and we really wanted to provide a perman...
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