This page covers 1 recall and 61 owner complaints for the 2017 GMC Sierra.
Powertrain and brakes account for the bulk of what 2017 GMC Sierra owners report. On the powertrain side, owners frequently describe the transmission making abrupt, uninstructed gear changes, typically a sudden downshift accompanied by RPM spikes, with no warning light to flag the event. A smaller group reports broader power loss, sometimes paired with StabiliTrak warnings and erratic steering behavior during low-speed turns or normal highway driving. Brake complaints center on a front wheel locking unexpectedly while driving, which owners say happens without driver input. Engine complaints are relatively few and spread across different symptoms. One isolated report describes smoke and flames appearing at the rear windshield with the defroster running, though that detail appears in a single account and doesn't reflect a recurring pattern in this complaint set. The most consistent thread across multiple reports remains the transmission's unpredictable shifting behavior.
61
Total Complaints
5
Crash-Related
1
Fire-Related
By System
At a glance
What can fail
Your owner's manual may be missing written instructions for using the child seat tether anchors and anchorage systems in your vehicle.
What the fix does
You will receive a mailed insert with the required instructions. Dealers will include it in manuals for unsold vehicles.
Summarized — see the official notice for exact wording, dates, and contacts.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
