GMC check engine codes
Overview
GMC trucks and SUVs share engines with Chevrolet. Lifter related misfires on V8s with cylinder deactivation and EVAP faults are common.
Codes notably common on GMC
GMC specific notes
- A pending class action alleges lifter failures in 2014 and later GM 5.3, 6.0, and 6.2 liter V8 engines with cylinder deactivation. GMC trucks share these engines with Chevrolet.
- GM bulletin 23-NA-073 adds an EVAP vent filter on 2019 and later Sierra and Silverado trucks for dust related P0449 and P0455.
Owner's manuals
Official GMC owner's manual / owner portal (manufacturer site; we do not host copies).
Repair manuals
Step-by-step service manuals for GMC with torque specs and wiring diagrams:
Haynes manuals for GMC Chilton manuals
Affiliate disclosure: links in this box may earn FixOrPark a commission at no extra cost to you.
Recall lookup
Check open GMC recalls with your VIN at the NHTSA recall lookup.
Sources
- https://www.gmlifterlawsuit.com/
- https://static.nhtsa.gov/odi/tsbs/2023/MC-10239087-0001.pdf
- https://www.nhtsa.gov/recalls
Sources checked October 2026. Bulletins apply only to the models and years they list.
All other codes
These work the same on GMC as on any vehicle:
P0430 P0301 P0302 P0303 P0304 P0440 P0442 P0456 P0128 P0135 P0141 P0101 P0299 P2135 P0401