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 $380.00NP261 Transfer Case Shifter Kit
This is a simple bolt-up solution for a 4x4 transfer case shifter assembly that works with either the 4L80 or 6L90 transmissions found in most 2003...
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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...
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$95.00GM 4x4 van Sway Bar Kit
Description: The mounting surfaces for the sway bar links differ from vans to trucks on the lower control arms which are changed during the 4x4 con...
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$480.00Easy-wire GM 4x4 hub lock + Indicator Kit
Description: The IFS 8.25 and 9.25 AAM front differential used in 1/2 ton and 3/4 ton GM pickups utilize an electronic actuator to engage the front...
View full details$480.00 -
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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from $88.00Shock Adapter Eyelet to Bar Style
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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$1,185.00IFS Front Axle Mounting System for 4x4 vans
Description: ***See fitment notes below for additional constraints. This kit most comfortably fits gas 4.8 and 6.0 vans, though it will fit other d...
View full details$1,185.00Sold out -
$95.00GM Van to Truck Hub Conversion Kit
Description: Silverado knuckles and Chevy Express knuckles are similar but they do not directly interchange. The K series knuckle is too short for ...
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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...
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$1,650.00NP261 Rebuilt Transfer Case
***Current lead time on transfer cases is 3 weeks from order to shipping. We intend to stock these in the near future. *** Description: The NP261 ...
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$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...
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$2,116.85GM 4x4 Conversion Essentials Kit
***Current lead time on this component kit is 7-10 days from order-to-ship*** Description: This kit comprises the over-the-counter components nece...
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$0.00Rear Leaf Spring Packs Lifted G-series
This is currently a placeholder for a product being added.
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$485.00Rear Driveshaft G-series 4x4
***Driveshafts are currently built when ordered and ship in 7-10 days. *** Description: We offer driveshafts for 4x4 van conversions completed usi...
View full details$485.00 -
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$395.00Front Driveshaft G-series 4x4
***Driveshafts are currently built when ordered and ship in 7-10 days. *** Description: We offer driveshafts for 4x4 van conversions completed usi...
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$0.00Hi-lift 4x4 GM van Conversion Carriages
This is currently a placeholder for a product being added.
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from $149.00GM G-series 4x4 Conversion Rear Lift Kit
***This product typically ships in 1-3 business days of purchase***. Description: Our GM 2" Rear lift kit is a very basic solution to lifting the r...
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from $4,532.004x4 Core Conversion Kit GM
Description: ***Current lead times on "Key Components" kits range from 1-3 weeks. Delivery time typically takes 7-10 days from the time of departur...
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from $115.004x4 Bump Stop Kit GM
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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