The service and repair manual for the 2018 GMC Sierra 1500 — 4.3L V6 and 5.3L V8 and 6.2L V8 engines, 9 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 | 4.3L V6 — OHV 5.3L V8 — 325 cu in, OHV 6.2L V8 — 376 cu in, OHV |
| Trims | Base Standard Cab Pickup 2-Door · SLT Crew Cab Pickup 4-Door · Base Extended Cab Pickup 4-Door · Denali Crew Cab Pickup 4-Door · SLE Crew Cab Pickup 4-Door · Base Crew Cab Pickup 4-Door +3 |
| Other 2018 Sierra 1500 variants | Sierra → |
| Federal record | 4 recalls · 409 complaints · 691 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2018 Sierra 1500 manual
03 / ContentsSections in the manual
- Quick Lookups 836
- General Information 2,103
- Accessories & Equipment 8,432
- Heating, Ventilation & A/C (HVAC) 534
- Body & Frame 2,369
- Hybrid/Electric Powertrain 500
- Brakes 961
- Maintenance 18
- Drivelines & Axles 479
- Restraints 432
- Electrical 5,135
- Steering 467
- Engine Mechanical 1,467
- Suspension 410
- Engine Performance 3,769
- Transmission 1,279
- Wheel Drive Shaft to Front Hub Nut (NEW) 188
04 / Known issuesRecalls on federal record for the 2018 Sierra 1500
- Service Brakes, Hydraulic — antilock/traction control/electronic limited · 19V761000Unintended activation of the driveline-protection system will cause unintended braking on the wheel.
- Air Bags · 26V166000A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or.
- Service Brakes, Hydraulic — power assist › vacuum · 19V645000As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the dist.
- Service Brakes, Hydraulic — power assist › vacuum · 20V603000A decrease in brake assist can increase the brake pedal effort and distance required to stop the veh.
Owners have filed 409 complaints and GMC has issued 691 technical service bulletins for the 2018 Sierra 1500. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2018 Sierra 1500 manual
Is this manual specific to the 2018 Sierra 1500?
Yes. It is the OEM manual matched to the 2018 model year, covering the 4.3L V6 and 5.3L V8 and 6.2L V8 across the Base Standard Cab Pickup 2-Door, SLT Crew Cab Pickup 4-Door, Base Extended Cab Pickup 4-Door, Denali Crew Cab Pickup 4-Door, SLE Crew Cab Pickup 4-Door, Base Crew Cab Pickup 4-Door, SLT Extended Cab Pickup 4-Door, SLE Extended Cab Pickup 4-Door, SLE Standard Cab Pickup 2-Door trims. Specifications and procedure sequences are the ones GMC published for this year.
What 2018 Sierra 1500 problems does it help with?
4 recalls are on federal record for the 2018 Sierra 1500, covering service brakes, hydraulic, air bags. 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 Sierra 1500 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 Sierra 1500 years and 2018 GMC models
2024 Sierra 1500 · 2023 Sierra 1500 · 2022 Sierra 1500 · 2021 Sierra 1500 · 2020 Sierra 1500 · 2019 Sierra 1500 · 2017 Sierra 1500 · 2016 Sierra 1500 · 2015 Sierra 1500 · 2014 Sierra 1500 · 2013 Sierra 1500 · 2012 Sierra 1500 · all 26 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 2500 HD · 2018 GMC Sierra 3500 HD · 2018 GMC Terrain · 2018 GMC Yukon · 2018 GMC Yukon XL · every 2018 model