1999 GMC C1500 Suburban Electrical system Problems
- Complaints
- 5about this part
- Share
- 42%of 12 total for the year
- Median mileage
- 99,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the electrical system of the 1999 GMC C1500 Suburban, 42% of the 12 complaints for this model year. Where a mileage was given, the median is 99,000 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.
“I clicked my 4-way flasher button while dropping my son off at the train station and when I came back it was difficult to press the button back down. After that, the operation of my emergency flashers was intermittent and eventually my rear brakes lights started working only intermittently as well. Now the brake lights do not work and my GM dealer says it will cost more than $500 to replace the whole wiring harness. This is the second failure of this type on this same suburban.”
NHTSA complaint #10177674, filed 2007-01, 153,500 miles“Car shut off in the middle of driving, this happen once or twice a year over a 12 year period, dealer keep saying it was switch or fuel pump, they kept charging me everytime...”
NHTSA complaint #10568527, filed 2014-03, 20,000 miles“The contact owns a 1999 Gmc suburban. The contact stated that the brakes were wearing prematurely. The vehicle was towed to the dealer, who stated that the brake lines, hardware, brake cylinder and calipers needed to be repaired. The manufacturer was made aware of the failure. The vehicle was repaired. The failure mileage was 99,000 and the current mileage was 137,960. Also, the A/C was repaired several times, as it was blowing out hot air, the rear passenger door was inoperative, the starter was replaced, the radiator was leaking. Updated 07/30/14”
NHTSA complaint #10604547, filed 2014-06, 99,000 milesElectrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1999 | 5 | 42% |
Other parts of the 1999 GMC C1500 Suburban
3 complaintsEngine cooling
2 complaintsAir bags
1 complaintsEquipment
1 complaintsFuel system
1 complaintsLatches, locks and linkages
1 complaintsOther or unknown
1 complaintsSteering
1 complaintsBody and structure
1 complaintsSuspension
1 complaints
← All problems reported for the 1999 GMC C1500 Suburban
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