The Dobinsons IMS Adjustable Lift Kit suits the Holden Colorado RG (2012-2020) and uses Internal Floating Piston monotube shocks to separate oil from gas, cutting foaming and heat fade on long touring runs. This kit pairs 2" raised leaf springs with matched front coil springs, giving a 2"-3" adjustable lift depending on your setup. The monotube design dissipates heat quicker than standard twin-tube shock absorbers, holding damping performance under sustained corrugations or towing load. Dispatched from Australian stock with manufacturer warranty and fitment guidance from our suspension team.
Browse all compatible suspension parts for your Holden Colorado Rg using our parts finder.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Holden | Colorado | RG | 2012-2020 | 2.8L Duramax Turbo Diesel |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page.
Choosing the right spring rate depends on what your Colorado RG carries day to day, not just the lift height you want. A ute running a steel bull bar and winch up front, or a tray, canopy and drawers out back, needs a firmer rate to sit level and control sag under constant load. Common accessories that shift your spring selection include bull bars, winches, canopies, dual battery trays, water tanks and caravan tow ball weight — tell us your typical loaded weight and we'll match the coil and leaf rate accordingly.
This kit is best fitted by a qualified suspension workshop or an experienced DIY installer with a hoist and standard hand tools. Wheel alignment is mandatory after fitting to correct camber, caster and toe at the new ride height, and to protect tyre wear. Allow a 500km break-in period for the leaf springs and bushes to settle before fine-tuning damping adjustment. For vehicles running larger tyres or a heavier front-end accessory load, pairing this kit with upgraded control arm upgrades helps restore correct front geometry at the lifted height.
Dobinsons has built its reputation on Australian-specified suspension, tuning spring rates and shock valving for local roads, tow weights and GVM upgrades rather than generic global settings. Every IMS shock is backed by a manufacturer warranty and the kit is dispatched from local Australian stock with fitment support from our in-house team. Tourers and tradespeople running Colorado RG utes commonly choose Dobinsons for the combination of daily comfort and load-carrying capability — view the full Dobinsons range for other Colorado-compatible components.
This kit suits Colorado RG owners running a bull bar, winch and canopy who need a lift kit that holds its ride height under constant load, plus grey nomads towing a van who want predictable rear geometry at the tow ball. If your accessory load varies trip to trip — empty one weekend, fully loaded the next — pairing this kit with airbag suspension in the rear leaf springs gives you adjustable load support without changing your spring rate.
This IMS lift kit is in stock in Australia now with fast dispatch and fitment support from our suspension team — browse our full lift kit range to compare options for the Colorado RG.
New to Colorado suspension? Read our guide to common Colorado suspension problems and how to fix them.
Yes, this Dobinsons IMS Adjustable Lift Kit is built for the Holden Colorado RG built from 2012 to 2020, fitted with the 2.8L Duramax turbo diesel. It uses the factory chassis mounting points, so no cutting or drilling is required for a standard installation. If you're running a GVM upgrade or non-standard accessories, contact our team to confirm your specific configuration before ordering.
This kit delivers a 2" raised rear leaf spring set matched with front coil springs, giving an adjustable 2" to 3" lift depending on your front coil selection and accessory load. The IMS shocks are valved to suit this lift range without needing extended brake lines in most configurations. Exact ride height also depends on vehicle load at the time of measurement.
Please note that all assembled struts are dispatched at a height based on our experience and the manufacturer’s specifications for the advertised lift. Coil springs and leaf springs are also manufactured according to the advertised height and constant-load rating. Actual vehicle height may vary depending on the vehicle and the weight of fitted accessories. Further adjustment may therefore be required after installation. The installer may use coil spacers or adjust the struts at their discretion to achieve the desired height. We are not responsible for vehicle-specific height variations or any additional adjustments required after installation.
The kit includes 2 front and 2 rear Dobinsons IMS adjustable monotube shock absorbers, 2 front coil springs, 2 rear leaf springs raised 2", U-bolt kits and greasable shackle bushes. Mounting hardware for the factory shock points is included, along with fitment instructions. Upper control arms are not included and are sold separately if your setup requires them.
Yes, the leaf spring rate and IMS monotube shocks in this kit are specified to handle sustained towing loads without excessive sag or heat fade. The Internal Floating Piston design keeps oil and gas separated under continuous damping cycles, which matters most on long tows or corrugated tracks. Tell us your typical tow ball weight when ordering so we can confirm the leaf spring rate suits your setup.
At a 2" to 3" lift, most Colorado RG owners see improved geometry and reduced CV angle strain by fitting upgraded control arms alongside this kit. It's not always mandatory at the lower end of the lift range, but it's recommended if you're running larger tyres or towing regularly. Our control arm range is designed to complement this lift height.
Yes, wheel alignment is mandatory after installing this kit. Camber, caster and toe all change at the new ride height and need to be reset to protect tyre wear and on-road handling. We recommend booking an alignment immediately after fitment, and again after the 500km break-in period.
Yes, Dobinsons offers different front coil and rear leaf spring rates for the Colorado RG to suit varying accessory loads, from a bare tray back to a fully kitted-out tourer with canopy and water tanks. Tell us your typical loaded weight, including bull bar, winch and rear accessories, and we'll recommend the matching spring rate. This ensures the vehicle sits level rather than sagging under constant load.
A 2" to 3" lift on the Colorado RG typically clears larger tyres up to around 33 inches, depending on wheel offset and whether flares or trimming are needed. Exact clearance depends on your wheel width and offset combination. Contact our team with your intended tyre and wheel size to confirm clearance before you order.
This Dobinsons IMS kit is covered by a manufacturer warranty against defects in materials and workmanship. Springs and shocks are dispatched from our Australian stock, and our team can assist with any warranty claims directly. Correct installation and alignment are required to keep the warranty valid.
Yes, the IMS monotube shocks are tuned to balance on-road comfort with off-road capability, so the Colorado RG remains comfortable for daily commuting as well as towing and touring. The adjustable damping lets you soften the ride for unladen daily use or firm it up when loaded. Most owners run one setting for daily driving and adjust before a tow or touring trip.
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