The service and repair manual for the 2018 GMC Terrain — 1.5L I4 and 1.6L I4 and 2.0L I4 engines, 5 trims. Matched to this exact model year, so the specifications and sequences are the ones GMC published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2018 |
|---|---|
| Engines | 1.5L I4 — 91 cu in, DOHC, turbocharged 1.6L I4 — 98 cu in, DOHC, turbocharged 2.0L I4 — 122 cu in, DOHC, turbocharged |
| Trims | SL Sport Utility 4-Door · SLE Sport Utility 4-Door · Base Sport Utility 4-Door · Denali Sport Utility 4-Door · SLT Sport Utility 4-Door |
| Federal record | 3 recalls · 314 complaints · 764 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2018 Terrain manual
03 / ContentsSections in the manual
- Quick Lookups 823
- General Information 2,067
- Accessories & Equipment 9,377
- Heating, Ventilation & A/C (HVAC) 616
- Body & Frame 2,519
- Maintenance 17
- Brakes 922
- Restraints 421
- Drivelines & Axles 157
- Steering 331
- Electrical 5,016
- Suspension 222
- Engine Mechanical 1,370
- Transmission 1,305
- Engine Performance 4,019
04 / Known issuesRecalls on federal record for the 2018 Terrain
- Service Brakes, Hydraulic — foundation components › disc › caliper · 18V576000A reduction of braking performance can increase the risk of a crash.
- Power Train — automatic transmission · 20V668000Missing bolts on the start-stop accumulator endcap could result in a transmission oil leak and may p.
- Power Train — driveline › driveshaft · 17V516000If the front right intermediate drive shaft assembly separates while driving, the vehicle will lose.
Owners have filed 314 complaints and GMC has issued 764 technical service bulletins for the 2018 Terrain. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2018 Terrain manual
Is this manual specific to the 2018 Terrain?
Yes. It is the OEM manual matched to the 2018 model year, covering the 1.5L I4 and 1.6L I4 and 2.0L I4 across the SL Sport Utility 4-Door, SLE Sport Utility 4-Door, Base Sport Utility 4-Door, Denali Sport Utility 4-Door, SLT Sport Utility 4-Door trims. Specifications and procedure sequences are the ones GMC published for this year.
What 2018 Terrain problems does it help with?
3 recalls are on federal record for the 2018 Terrain, covering service brakes, hydraulic, power train. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by GMC dealers.
Does it include 2018 Terrain wiring diagrams?
Yes — the complete wiring diagrams for the 2018 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $49.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Terrain years and 2018 GMC models
2024 Terrain · 2023 Terrain · 2022 Terrain · 2021 Terrain · 2020 Terrain · 2019 Terrain · 2017 Terrain · 2016 Terrain · 2015 Terrain · 2014 Terrain · 2013 Terrain · 2012 Terrain · all 15 years
2018 GMC Acadia · 2018 GMC Canyon · 2018 GMC Savana 2500 · 2018 GMC Savana 3500 · 2018 GMC Savana 4500 · 2018 GMC Sierra · 2018 GMC Sierra 1500 · 2018 GMC Sierra 2500 HD · 2018 GMC Sierra 3500 HD · 2018 GMC Yukon · 2018 GMC Yukon XL · every 2018 model