4.0

definitely annoying
Typical Repair Cost:
No data
Average Mileage:
46,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. replace trailer brake relay (1 reports)
2015 GMC Sierra 1500 electrical problems

electrical problem

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2015 GMC Sierra 1500 Owner Comments

problem #1

Oct 012017

Sierra 1500 SLT 5.3L

  • Automatic transmission
  • 46,000 miles

A D V E R T I S E M E N T S

Randomly the dash would flash a warning of "Service Trailer Brake System" accompanied by a chime. It would not have been as annoying if it just did it once, but it would reset and throw the same code about 10 to 15 times while driving over a period of 5 minutes. The dealership would replace it for 300, but the part is easily accessible (under bed above the spare tire) and can be bought online for 30 bucks.

- Brad M., Greenwell Springs, LA, US

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