The 2004 GMC Sierra has 40 electrical system complaints filed with NHTSA — 18% of the year's total, and roughly flat versus the prior model year.
40
Electrical System complaints
18%
Share of year
0
Crash-involved
1
Related recalls
Defect
CERTAIN CEQUENT 90 DEGREE 7-WAY RIGHT ANGLE ADAPTORS SOLD BY DISTRIBUTORS IN TOW PACKAGES FOR AFTERMARKET SALES TO TOW 5TH WHEEL RV TRAVEL TRAILERS. DUE TO INCORRECT WIRING OF THE HARNESS, THE TRAILER LIGHTS MAY NOT OPERATE PROPERLY.
Consequence
IF THE TRAILER LIGHTS ARE NOT WORKING PROPERLY, A VEHICLE CRASH CAN OCCUR.
Remedy
ALL OF THE DEFECTIVE TOW PACKAGES ARE STILL AT THE DISTRIBUTOR LEVEL AND HAVE NOT BEEN SOLD TO ANY CONSUMERS.
“I HAD PURCHASED MY SIERRA 1500 FROM CHESROWN DEALERSHIP OF DELAWARE OHIO. I HAD THE TRUCK FOR LESS THAN 60 DAYS. I LOVED THE TRUCK VERY MUCH BUT WAS VERY UPSET WHEN AN ELECTRICAL FIRE STARTED IN UNDER MY HOOD. THIS HAPPENED THE DAY AFTER THANKSGIVING AND SINCE I HAD THE FACTORY STEREO SYSTEM I HAD…”
NHTSA has 40 complaints about the 2004 GMC Sierra electrical system — 18% of all complaints filed for that model year.
Yes — 1 NHTSA recall campaign for this model year is tied to the electrical system: 07E066000.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.