2019 GMC Sierra Denali Electrical system Problems
- Complaints
- 5about this part
- Share
- 19%of 26 total for the year
- Median mileage
- 6,200miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the electrical system of the 2019 GMC Sierra Denali, 19% of the 26 complaints for this model year. Where a mileage was given, the median is 6,200 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“On january 23rd I started the Gmc via the Gmc phone app and when I got in the truck pushed brake and start button and that's will gauges went crazy saying brake malfunction .steering ,speed reduced to 62 MPH and brake pedal went to floor with little to no brakes and stopped the truck turned it off and on twice before all codes cleared except now the check engine light is on . Brakes appeared to work fine after te second time of turning the truck off and on .970 miles on it!”
NHTSA complaint #11301754, filed 2020-01, 970 miles“Engine light keeps coming on take it to the dealer I guess they reset it and now this is the 3rd time it's now back on, back up camera goes out from time to time,”
NHTSA complaint #11309140, filed 2020-02, 26,000 miles“Electric/electronic/computer issues. Most issues are intermittent, some happen all the time. The intermittent ones sometime happen in clusters (multiple times a day then not for days, weeks, months) a few have only happened once so far. The following issues happen all the time. Does not come out of cruise control automatically during collision alert. Does not automatically brake during imminent collision with auto brake feature turned on. Secondary bluetooth phone does outgoing calls through trucks info system. Heads-up display gives double turn directions during route guidance nav. …”
NHTSA complaint #11307106, filed 2020-02, 480 milesRelated service bulletins
- 11017595Apr 3, 2025This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
- 11017244Mar 31, 2025The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other…
- 11017207Mar 21, 2025This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E4403, M4404, M4413, M6954, M6955, E4414…
- 11017031Mar 12, 2025This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.
- 11014230Jan 31, 2025This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 11014222Jan 28, 2025This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
- 11013069Jan 9, 2025This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
- 11012929Jan 7, 2025This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- 11011805Dec 6, 2024This Preliminary information communicates a GM part number for reflective high temperature heat or insulating tape when repairing wiring harnesses.
- 11010421Oct 3, 2024This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
Electrical system: other model years
Other parts of the 2019 GMC Sierra Denali
8 complaintsSteering
7 complaintsElectronic stability control
5 complaintsOther or unknown
5 complaintsEngine
4 complaintsTransmission and drivetrain
4 complaintsExterior lighting
2 complaintsBack-over prevention (rear camera)
1 complaintsEngine cooling
1 complaintsEquipment
1 complaintsBody and structure
1 complaintsTires
1 complaints
← All problems reported for the 2019 GMC Sierra Denali
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology