Parts for your 2012 Holden Colorado-Rack boots

2012 Holden Colorado rack-boots — what they do and how to look after them

Rack-boots are absolutely fitted to the 2012 Holden Colorado (RG). Technical references back this up: the Holden RG Colorado Workshop Manual (Steering section) and the 2012 Isuzu D‑MAX Workshop Manual (Power Steering – Rack and Pinion) both specify a hydraulic power‑assisted rack‑and‑pinion steering gear with bellows‑type boots on each side. GM/ACDelco parts catalogues for the RG also list steering gear boots (often called bellows) for this model. So yes—rack‑boots are relevant to the 2012 Colorado.

On the Colorado, rack‑boots (the ribbed bellows at each end of the steering rack) keep dust, water, and grit away from the inner tie rods and the rack’s inner seals. They also help retain the light grease on the inner joints and allow the rack to breathe as it moves. If a boot splits, contaminants get in, grease gets out, and the steering rack can wear prematurely—often turning a cheap boot job into an expensive rack replacement.

For regular servicing in Australia and New Zealand conditions, it’s smart to have the rack‑boots inspected at each service interval (typically around 15,000 km, or as per the owner’s schedule). Any cracks, splits, perishing, loose clamps, or wet, oily residue inside the boot need attention. Note: a boot shouldn’t contain power steering fluid, if there’s oil inside, that usually points to a leaking rack seal, not a bad boot alone.

Replacement is straightforward for a trained tech and usually doesn’t require removing the rack. Using OE‑quality boots and proper stainless clamps (not cable ties) makes a difference. The boot should be centred with no twist, clamp lands cleaned, and breathing equalised so it doesn’t balloon or collapse. If the outer tie‑rod end is disturbed, a wheel alignment is recommended. While in there, checking the inner tie‑rod joints for play is a no‑brainer—best to fix wear before it starts scrubbing tyres.

• Common signs to watch: cracked rubber, grease sling on the lower control arm, dirt packed under the bellows, notchy steering, or uneven tyre wear.
• Driving with a torn boot risks water ingress after rain, beach work, or off‑road use—get it sorted promptly.
• Choose quality thermoplastic elastomer (TPE) or OE‑spec rubber boots matched to the RG rack for correct fit and travel.

Look after the rack‑boots and the Colorado’s steering will stay tight, quiet, and drama‑free for the long haul.

Popular questions about 2012 Holden Colorado rack‑boots

How long do rack‑boots last on a 2012 Colorado?
In normal on‑road use they can last many years, often well past 100,000 km. Harsh heat, UV, mud, sand, and frequent full‑lock manoeuvres shorten their life. A quick visual at every service is the best insurance.

Can it be driven with a split rack‑boot?
It’ll still steer, but it’s risky. A torn boot lets in grit and water, which can chew out the inner tie rod and the rack’s seals. If the boot is split, book it in—sooner is cheaper than later.

Do you need a wheel alignment after replacing a rack‑boot?
Yes, if the outer tie‑rod end is removed or adjusted. Even if you match the old position, an alignment is recommended to protect tyres and ensure it tracks straight.