
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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$295.00| /Timberline Superbeef Roof Rack Brackets DIY Gutter Mount Chevy and Ford Vans
Description: We went out and built a bunch of full-length roof racks for Ford E-series and G-series vans and installed them for people and waited t...
View full details$295.00| /Sold out -
$95.00| /
Sway Bar + Links Relocate Kit for GM 4x4 Van Conversion
Description: When converting a GM 2500 / 3500 series van to 4x4, the placement of the sway bar links and the bar itself can be a little tricky with...
View full details$95.00| / -
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$480.00| /Wiring Harness for Differential and Tranfer Case 4x4 GM Van Conversion
Description: The IFS 9.25 GM front differential utilizes an electronic actuator to engage the front CV axles and lock hubs in. It's nice to not hav...
View full details$480.00| /Sold out -
$1,185.00| /
Differential Mount System (standard) for 9.25 IFS 4x4 GM Van Conversion
Description: This kit contains all the necessary components to mount a 9.25 IFS GM front differential from a 3/4 or 1 ton Silverado ('99-'10) to an...
View full details$1,185.00| / -
$88.00| /
Silverado Truck Hub to Express Van Knuckle Adapter Rings
Description: Silverado knuckles and Chevy Express knuckles are similar but they do not directly interchange. The K series knuckle is too short for ...
View full details$88.00| / -
$4,450.00| /
Basic 4x4 Conversion Kit Chevrolet Express / GMC Savana (2003-2021)
Description: This is our standard conversion kit containing the non "over-the-counter" components required to do an IFS 4x4 torsion bar conversion ...
View full details$4,450.00| / -
from $495.00| /
4x4 Conversion Adapter for 4L80 to NP261
Description: Often the most labor-intensive component of converting a van from 2WD to 4x4 is dealing with the transmission. 2003-2009 GM 2500/3500/...
View full detailsfrom $495.00| / -
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$88.00| /Eyelet to Bar Style Shock Adapter - Eye shock converter
Description: There are quite a few options for shock adapters, but limited or no options for converting an eye-style shock mount to a bar-style. Wh...
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$380.00| /Transfer Case Shifter Kit - 4L80 / 6L90 to NP261
Description: We are in the process of updating the specs on this product and will post inventory when available. This is a simple bolt-up solutio...
View full details$380.00| /Sold out -
$1,875.00| /
6L90 Bolt-Up 4x4 Conversion Kit
Description: Often the most labor-intensive component of converting a van from 2WD to 4x4 is dealing with the transmission. 2010-2022 GM 2500/3500/...
View full details$1,875.00| / -
from $115.00| /
Bump Stop Kit - Chevrolet Express 4x4 Conversion
Description: Our torsion bar 4x4 setup uses 1999-2010 GM lower control arms which interface with similar truck torsion bars. The striking pad profi...
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$885.00| /
Chevrolet Express 2500 + 3500 4x4 Van Conversion Torsion Bar Carriage 6L90
Description: 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 details$885.00| /