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.
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from $299.95Superbeef Roof Rack Bracket System GM+Ford
***Roof rack brackets are going to powder coat the week of 10/20 and will ship the 1st week of November.*** Description: The Timberline Superbeef ...
View full detailsfrom $299.95 -
from $4,302.00GM Van 4x4 Core Conversion Kit Standard Lift
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 dilige...
View full detailsfrom $4,302.00 -
from $845.00GM Van 4x4 IFS Front Differential Mounting System - Standard Lift
Description: This kit includes the basic components, templates, and bracketry required to hang a 4x4 IFS GM front differential from your 2003-2023 ...
View full detailsfrom $845.00 -
$325.00Hi Clearance GM Center Link ($125 core)
Description: This high-clearance GM van center link is specially designed to address clearance issues with the steering linkage in 4x4 conversions,...
View full details$325.00 -
from $250.004L80 Manual Transfer Case Shifter Kit
Description This is a bolt-up manual transfer case shifter for the 4L80 transmission found in many GM pickups and vans. Our shifter is designed to...
View full detailsfrom $250.00 -
from $199.006L90 Manual Transfer Case Shifter Kit
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...
View full detailsfrom $199.00 -
from $139.00GM G-series 4x4 Conversion Rear Lift Kit
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/...
View full detailsfrom $139.00 -
from $249.00Easy-wire GM 4x4 hub lock + Indicator Kit
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...
View full detailsfrom $249.00 -
$110.00GM 4x4 van Sway Bar Kit
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...
View full details$110.00 -
from $79.00Shock Adapter Eyelet to Bar Style
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...
View full detailsfrom $79.00 -
from $595.004L80 4x4 Conversion Adapter Kit (no-cut)
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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$99.004L80 4x4 Extension Housing GM OE Aluminum
Description: This is a GM performance or ACDelco OE Aluminum 4x4 extension housing compatible with 1999-2007 Silverado 2500 + 3500 vehicles & S...
View full details$99.00 -
$55.00Hub Spacer Kit 2WD to 4x4 Adapter Rings
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 ...
View full details$55.00 -
from $115.00GM 4x4 Van Bump Stop Kit
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...
View full detailsfrom $115.00 -
$75.00Timberline Helper Kit
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 ...
View full details$75.00 -
from $99.00Easy-Wire Transfer Case Range LED Indicator Kit
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...
View full detailsfrom $99.00 -
Sold out
$1,595.009.25 IFS AAM Rebuilt Front Differential
***Current lead time on front differentials is 3 weeks from order to shipping. We intend to stock these in the near future. *** Description: The AA...
View full details$1,595.00Sold out
