Parts for your 2020 Holden Colorado-Exhaust mount

2020 Holden Colorado Exhaust Mounts

Based on technical sources including the GM Holden Colorado RG Service Manual (Global SI) procedures for Exhaust/Muffler Hanger and Bracket Replacement, as well as the GM Electronic Parts Catalogue (EPC) listings for the 2020 RG Colorado exhaust system, this ute is definitely fitted with exhaust mounts (rubber hanger insulators and steel brackets). These mounts appear along the system from the downpipe/DPF area through to the rear muffler, supporting the pipework and isolating vibration.

On a 2020 Holden Colorado, exhaust mounts do a deceptively big job. They carry the weight of the exhaust and DPF, allow thermal expansion without stressing joints, and keep the tailpipe sitting neatly so it doesn’t knock the chassis, towbar, spare, or leaf springs. The rubber insulators are there to soak up vibration so fewer droning noises travel into the cabin. Because the Colorado often tows, hits corrugations, and cops a bit of off‑road work, these mounts see plenty of movement and heat cycles. When they harden, crack, or stretch, the exhaust can sag, rattle on bumps, and put extra load on flanges, flex joints, and sensors.

As part of routine servicing, it’s sensible to inspect the mounts every time the ute is on a hoist. Look for perished rubber, torn insulators, bent brackets, or shiny contact marks that suggest the pipe is touching the body. A quick pry with a trim tool shows how much give is left in the rubber. If any mount looks suspect, replace it—don’t wait for a knock to become a split or for a hanger stud to snap. Replacement is straightforward: safely support the exhaust, unbolt any hanger brackets as needed, lubricate the old insulators with silicone spray, lever them off, and fit new OEM-quality pieces. Refit brackets and tighten to the workshop manual’s torque spec, then check clearances around the DPF, crossmember, and rear bumper. For best results, replace mounts in pairs on the same section so the exhaust sits square. Owners who tow, drive on corrugations, or do frequent short trips (more DPF heat cycles) should be extra diligent, as those conditions accelerate rubber ageing.

• Common signs: clunks over bumps, buzzing at certain revs, droopy tailpipe, melted or shiny contact spots.
• Service tip: after any exhaust work (e.g., DPF clean or muffler swap), recheck hanger alignment and clearances once the system has heat‑cycled.

FAQs

How many exhaust mounts does a 2020 Colorado have?
It varies with body style and exhaust option, but most 2020 RG Colorados use multiple rubber insulators from the DPF back to the rear muffler—typically four to six pieces. The GM EPC for the RG series shows the exact count and positions for each variant.

Can worn mounts cause exhaust or DPF issues?
Yes. Sagging or torn mounts can let the system shift, stressing flanges and flex joints, creating rattles, and in worst cases leading to leaks or sensor wiring strain around the DPF area. Replacing tired mounts helps keep the system sealed and quiet.

When should the mounts be replaced?
There’s no fixed kilometre interval. Inspect them at every service, replace any that are cracked, hardened, misshapen, or oil-soaked. For utes that tow or see rough roads, expect earlier replacement than city‑only vehicles.