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Oct 29 - We are getting pretty close on last inventory for this year for a few products, (2) Ford & GM Core kits done your way. We have just (2) 4 link kits left in HD only, and a handful of trackbar kits. Once these are gone there will be no further production until next year, so plan accordingly. We are taking some time here at the end of the year to work on the site, product development, and video editing. Thanks for stopping by!
Oct 29 - We are getting pretty close on last inventory for this year for a few products, (2) Ford & GM Core kits done your way. We have just (2) 4 link kits left in HD only, and a handful of trackbar kits. Once these are gone there will be no further production until next year, so plan accordingly. We are taking some time here at the end of the year to work on the site, product development, and video editing. Thanks for stopping by!
Timberline 4x4 GM Van

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. 

 

Original price $299.95 - Original price $359.95
Original price
$299.95 - $359.95
$299.95 - $359.95
Current price $299.95

Superbeef Roof Rack Bracket System GM+Ford

Timberline Supply
Inventory 3

Description: The Timberline Superbeef roof rack bracket system is the perfect solution for mounting your custom-built roof rack on your full-size ...

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Original price $299.95 - Original price $359.95
Original price
$299.95 - $359.95
$299.95 - $359.95
Current price $299.95
Original price $4,395.00 - Original price $6,395.00
Original price
$4,395.00 - $6,395.00
$4,395.00 - $6,395.00
Current price $4,395.00

GM Van 4x4 Core Conversion Kit Standard Lift

Timberline Supply
Out of stock

Description: 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...

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Original price $4,395.00 - Original price $6,395.00
Original price
$4,395.00 - $6,395.00
$4,395.00 - $6,395.00
Current price $4,395.00
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Original price $10,295.00 - Original price $12,395.00
Original price
$10,295.00 - $12,395.00
$10,295.00 - $12,395.00
Current price $10,295.00

GM Van 4x4 Turnkey Conversion Kit Standard Lift

Timberline Supply
Out of stock

Please 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 details
Original price $10,295.00 - Original price $12,395.00
Original price
$10,295.00 - $12,395.00
$10,295.00 - $12,395.00
Current price $10,295.00
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Original price $845.00 - Original price $1,295.00
Original price
$845.00 - $1,295.00
$845.00 - $1,295.00
Current price $845.00

GM Van 4x4 IFS Front Differential Mounting System - Standard Lift

Timberline Supply
Out of stock

Description: This kit includes the basic components, templates, and bracketry required to hang a 4x4 IFS GM front differential from your 2003-2023 ...

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Original price $845.00 - Original price $1,295.00
Original price
$845.00 - $1,295.00
$845.00 - $1,295.00
Current price $845.00
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Original price $325.00 - Original price $325.00
Original price
$325.00
$325.00 - $325.00
Current price $325.00

Hi Clearance GM Center Link ($125 core)

Timberline Supply
Out of stock

Description: This high-clearance GM van center link is specially designed to address clearance issues with the steering linkage in 4x4 conversions,...

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Original price $325.00 - Original price $325.00
Original price
$325.00
$325.00 - $325.00
Current price $325.00
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Original price $345.00 - Original price $455.00
Original price
$345.00 - $455.00
$345.00 - $455.00
Current price $345.00

4L80 Manual Transfer Case Shifter Kit

Timberline Supply
Inventory 5

Description This is a universal bolt-up manual transfer case shifter for the 4L80 transmission found in GM trucks and vans. The kit is optimized fo...

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Original price $345.00 - Original price $455.00
Original price
$345.00 - $455.00
$345.00 - $455.00
Current price $345.00
Original price $199.00 - Original price $380.00
Original price
$199.00 - $380.00
$199.00 - $380.00
Current price $199.00

6L90 Manual Transfer Case Shifter Kit

Timberline Supply
Inventory 5

Description 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...

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Original price $199.00 - Original price $380.00
Original price
$199.00 - $380.00
$199.00 - $380.00
Current price $199.00
Original price $139.00 - Original price $479.00
Original price
$139.00 - $479.00
$139.00 - $479.00
Current price $139.00

GM G-series 4x4 Conversion Rear Lift Kit

Timberline Supply
Out of stock

Description: 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/...

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Original price $139.00 - Original price $479.00
Original price
$139.00 - $479.00
$139.00 - $479.00
Current price $139.00
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Original price $249.00 - Original price $399.00
Original price
$249.00 - $399.00
$249.00 - $399.00
Current price $249.00

Easy-wire GM 4x4 hub lock + Indicator Kit

Timberline Supply
Inventory 2

Description: 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...

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Original price $249.00 - Original price $399.00
Original price
$249.00 - $399.00
$249.00 - $399.00
Current price $249.00
Original price $110.00 - Original price $110.00
Original price
$110.00
$110.00 - $110.00
Current price $110.00

GM 4x4 van Sway Bar Kit

Timberline Supply
Inventory 5

Description: Our GM 4x4 van sway bar kit simplifies the process of repositioning your sway bar and links when converting your van to 4x4. Switching...

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Original price $110.00 - Original price $110.00
Original price
$110.00
$110.00 - $110.00
Current price $110.00
Original price $79.00 - Original price $309.00
Original price
$79.00 - $309.00
$79.00 - $309.00
Current price $79.00

Shock Adapter Eyelet to Bar Style

Timberline Supply
Inventory 5

Description: This Eyelet-to-bar style adapter bracket can be used to retain your original van front shocks during your 4x4 conversion or our recomm...

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Original price $79.00 - Original price $309.00
Original price
$79.00 - $309.00
$79.00 - $309.00
Current price $79.00
Original price $595.00 - Original price $695.00
Original price
$595.00 - $695.00
$595.00 - $695.00
Current price $595.00

4L80 4x4 Conversion Adapter Kit (no-cut)

Timberline Supply
Out of stock

Description: This is a straightforward bolt-on solution for converting your 4L80 transmission to 4x4, without the need to cut the output shaft. To ...

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Original price $595.00 - Original price $695.00
Original price
$595.00 - $695.00
$595.00 - $695.00
Current price $595.00
Sold out
Original price $99.00 - Original price $99.00
Original price
$99.00
$99.00 - $99.00
Current price $99.00

4L80 4x4 Extension Housing GM OE Aluminum

Timberline Supply
Out of stock

Description: This is a GM performance or ACDelco OE Aluminum 4x4 extension housing compatible with 1999-2007 Silverado 2500 + 3500 vehicles & S...

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Original price $99.00 - Original price $99.00
Original price
$99.00
$99.00 - $99.00
Current price $99.00
Sold out
Original price $65.00 - Original price $65.00
Original price
$65.00
$65.00 - $65.00
Current price $65.00

Hub Spacer Kit 2WD to 4x4 Adapter Rings

Timberline Supply
Inventory 4

Description: Our CNC-cut powder-coated hub spacer is a key component of GM 4x4 van conversions where the original van knuckles are retained. These ...

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Original price $65.00 - Original price $65.00
Original price
$65.00
$65.00 - $65.00
Current price $65.00
Original price $115.00 - Original price $165.00
Original price
$115.00 - $165.00
$115.00 - $165.00
Current price $115.00

GM 4x4 Van Bump Stop Kit

Timberline Supply
Inventory 5

Description: 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...

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Original price $115.00 - Original price $165.00
Original price
$115.00 - $165.00
$115.00 - $165.00
Current price $115.00
Original price $75.00 - Original price $75.00
Original price
$75.00
$75.00 - $75.00
Current price $75.00

Timberline Helper Kit

Timberline Supply
Inventory 5

Description: Are you building a 4x4 van? Let us help you with the consumables. Drawing on our experience of hundreds of 4x4 conversions, these are ...

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Original price $75.00 - Original price $75.00
Original price
$75.00
$75.00 - $75.00
Current price $75.00
Original price $885.00 - Original price $985.00
Original price
$885.00 - $985.00
$885.00 - $985.00
Current price $885.00

GM 4x4 Van Torsion Bar Carriage System

Timberline Supply
Out of stock

Description: This torsion bar carriage and transmission/t-case cross-member is designed for use in 2500 + 3500 series Chevy Express and GMC Savana ...

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Original price $885.00 - Original price $985.00
Original price
$885.00 - $985.00
$885.00 - $985.00
Current price $885.00
Sold out
Original price $99.00 - Original price $115.00
Original price
$99.00 - $115.00
$99.00 - $115.00
Current price $99.00

Easy-Wire Transfer Case Range LED Indicator Kit

Timberline Supply
Inventory 1

Description: 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...

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Original price $99.00 - Original price $115.00
Original price
$99.00 - $115.00
$99.00 - $115.00
Current price $99.00
Original price $14,195.00 - Original price $16,395.00
Original price
$14,195.00 - $16,395.00
$14,195.00 - $16,395.00
Current price $14,195.00

GM 4x4 5" Turn-key Hi-Lift Torsion Bar Conversion Kit

Timberline Supply
Out of stock

Please 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 details
Original price $14,195.00 - Original price $16,395.00
Original price
$14,195.00 - $16,395.00
$14,195.00 - $16,395.00
Current price $14,195.00
Sold out
Original price $1,695.00 - Original price $1,895.00
Original price
$1,695.00 - $1,895.00
$1,695.00 - $1,895.00
Current price $1,695.00

9.25 IFS AAM Rebuilt Front Differential

Timberline Supply
Out of stock

Description: 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...

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Original price $1,695.00 - Original price $1,895.00
Original price
$1,695.00 - $1,895.00
$1,695.00 - $1,895.00
Current price $1,695.00
Sold out
Original price $1,695.00 - Original price $1,695.00
Original price
$1,695.00
$1,695.00 - $1,695.00
Current price $1,695.00

NP261 Rebuilt Transfer Case for 4x4 Van Conversions

Timberline Supply
Out of stock

Description: The NP261 was built by New Process (New Venture) and is a reliable chain-driven transfer case used primarily in Chevrolet and GMC veh...

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Original price $1,695.00 - Original price $1,695.00
Original price
$1,695.00
$1,695.00 - $1,695.00
Current price $1,695.00
Sold out
Original price $1,095.00 - Original price $1,095.00
Original price
$1,095.00
$1,095.00 - $1,095.00
Current price $1,095.00

GM G-series Adjustable Upper Control Arms

Timberline Supply
Out of stock

Description: These are adjustable upper control arms for the Chevy Express and GMC Savana Van 2500/3500/4500 series vans from 2003-current. Our con...

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Original price $1,095.00 - Original price $1,095.00
Original price
$1,095.00
$1,095.00 - $1,095.00
Current price $1,095.00
Sold out
Original price $2,095.00 - Original price $3,379.00
Original price
$2,095.00 - $3,379.00
$2,095.00 - $3,379.00
Current price $2,095.00

GM 4x4 Conversion Over The Counter Essentials Kit

Timberline Supply
Out of stock

Description: This kit comprises the over-the-counter components necessary to complete our standard and Hi-Lift 4x4 torsion bar conversions on mos...

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Original price $2,095.00 - Original price $3,379.00
Original price
$2,095.00 - $3,379.00
$2,095.00 - $3,379.00
Current price $2,095.00
Sold out
Original price $485.00 - Original price $645.00
Original price
$485.00 - $645.00
$485.00 - $645.00
Current price $485.00

GM Full Size 4x4 Conversion Custom Rear Driveshaft

Timberline Supply
Out of stock

Description: 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 details
Original price $485.00 - Original price $645.00
Original price
$485.00 - $645.00
$485.00 - $645.00
Current price $485.00
Sold out