The Holden Colorado RG (2012-2020) and its wagon sibling the Colorado 7 remain everywhere on Australian roads, and their suspension complaints are consistent: a rear end owners describe as developing a "saggy bum" under tow ball weight, a busy unladen ride, and the usual IFS questions once a lift goes on. Parts support remains strong despite Holden's exit - here is what fails and how to fix it.
Factory rear leafs lose height under constant load - a tray, canopy or van ball weight drops the tail and lightens the steering. Helper springs and airbags are band-aids on a flat spring; the durable fix is heavy-duty rear leafs rated for your real load, fitted with matched shocks in a kit like the Toughdog 2" RG kit. The coil-rear Colorado 7 wagon has its own spec - the Dobinsons Colorado 7 kit - and the earlier RC (2008-2012) is covered by the RC-specific kit.
That trade-off is spring rate selection - pick for your constant load, not the once-a-year maximum. If the load genuinely varies, adjustable damping bridges the gap: the Dobinsons MRA 2"-3" adjustable RG kit lets you back damping off empty and firm it for towing, and the IMS Quick-Lift offers monotube control in a simpler package.
Independent front end, standard rules: about 2" on factory geometry, UCAs beyond that for caster/camber range, diff drop worth considering at 3". Alignment after fitting and after settle-in is not optional.
Suspension lifts beyond your state's allowable limit (commonly 50mm without certification, less once combined with larger tyres) may require engineering approval under the applicable light vehicle modification rules (VSB14/NCOP). Check your state's requirements before buying - an uncertified over-height lift can affect insurance and roadworthiness. We flag this on every 3" and 4" capable kit we sell.
Yes - the aftermarket fully supports the RG and Colorado 7, and the platform shares DNA with the global Isuzu D-Max family of its era.
Springs rated for the load first. Airbags only as helpers for variable loads on top of a healthy spring - forum owners who tried helpers on flat springs ended up replacing the springs anyway.
Fronts are related; rears are completely different (leaf ute vs coil wagon). Buy model-specific.
Tell our team your load or browse all Colorado kits.
Add your favourites to cart
Log into or create your Afterpay account, with instant approval decision
Your purchase will be split into 4 payments, payable every 2 weeks
All you need to apply is to have a debit or credit card, to be over 18 years of age, and to be a resident of country offering Afterpay
Late fees and additional eligibility criteria apply. The first payment may be due at the time of purchase
For complete terms visit afterpay.com/terms
