How to Replace Front Struts & Rear Shock Absorbers on a 2018 GMC Terrain
Step-by-step suspension replacement guide with tools, parts list, safety tips, and torque spec notes
How to Replace Front Struts & Rear Shock Absorbers on a 2018 GMC Terrain
Step-by-step suspension replacement guide with tools, parts list, safety tips, and torque spec notes


đź”§ Terrain - Shock Absorber Replacement
On your Terrain, the “shocks” can mean the rear shock absorbers and/or the front strut assemblies (a strut is a shock with a spring built around it). The steps, tools, and torque specs are different front vs rear, and also differ by FWD vs AWD.
Difficulty Level: Intermediate | Estimated Time: 2-6 hours
⚠️ Safety & Precautions
- ⚠️ Support the vehicle with jack stands on the pinch welds/subframe; never rely on a jack.
- ⚠️ Suspension parts can be under spring load; the front strut can be dangerous if disassembled without a spring compressor.
- ⚠️ If you’re doing front struts, do not let the steering knuckle hang by the brake hose/wiring—support it.
- ⚠️ Battery disconnect is not usually required, but keep the key away and avoid turning the steering with parts disconnected.
đź”§ Required Tools
You'll need the following tools for this repair:
- Floor jack (rated 3-ton minimum)
- Jack stands (rated 3-ton minimum)
- Wheel chocks
- Lug nut socket (22mm)
- 1/2" drive breaker bar
- 1/2" drive torque wrench (20–200 ft-lbs)
- 3/8" drive ratchet
- Socket set (10mm–24mm)
- Wrench set (10mm–24mm)
- Torx bit set (T20–T50)
- Pry bar
- Needle-nose pliers
- Penetrating oil
- Paint marker
- Dead-blow hammer
- Spring compressor (specialty)
- Safety glasses
- Mechanic gloves
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Rear shock absorbers - Replace in pairs - Qty: 2
- Front complete strut assemblies - Replace in pairs - Qty: 2
- Front strut mount/bearing kit - If reusing springs - Qty: 2
- Front bump stop and dust boot kit - If worn - Qty: 2
- New strut-to-knuckle bolts/nuts - If specified as one-time-use - Qty: 1 set
đź“‹ Before You Begin
- Park on level ground, set the parking brake, and chock the rear wheels.
- Break the lug nuts loose with a 22mm socket and breaker bar before lifting.
- Two quick questions so I give the exact steps and torque specs:
- Are you replacing the front (struts), the rear (shocks), or all four?
- Is your Terrain FWD or AWD?
- Tip: If doing front struts, plan an alignment.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Confirm which end you’re replacing
- Reply with Front, Rear, or All, and FWD or AWD.
- Once confirmed, I’ll provide the exact step sequence and the correct torque specs for your Terrain.
Step 2: Do not disassemble a front strut without the right parts
- If you are replacing front struts, decide whether you’re installing complete strut assemblies or reusing your springs.
- If reusing springs, you must use a spring compressor (specialty) (it compresses the coil spring so the top nut can be removed safely).
âś… After Repair
- Torque the wheel lug nuts with a torque wrench in a star pattern after the vehicle is on the ground.
- Test drive slowly first; listen for clunks and recheck fasteners.
- If you replaced front struts, get a 4-wheel alignment as soon as possible.
đź’° DIY vs Shop Cost
Shop Cost: $700-$1,800 (parts + labor, depending front/rear/all)
DIY Cost: $180-$900 (parts only, depending front/rear/all)
You Save: $520-$900 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-6 hours.
🎯 Ready to get started?
HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

















