1999 GMC Denali Electrical system Problems
- Complaints
- 4about this part
- Share
- 29%of 14 total for the year
- Median mileage
- 63,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 1999 GMC Denali, 29% of the 14 complaints for this model year. Where a mileage was given, the median is 63,000 miles. 1 a fire, according to the filers.
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 purchased a 1999 yukon Denali from my former brother n law; he didn't inform me that my windows, door locks, radio,and windshield wipers would stop working. I was told that I needed a body control module; one Gmc mechanic asked me what does this part do. I'm a lady how would I know these things. I still don't have my vehicle repaired. Will this cause me other problems or can I continue to drive off a wing and a prayer?”
NHTSA complaint #10358855, filed 2010-10, 119,900 miles“On april 4, 2006 at approx. 5:00pm our 1999 Denali Gmc caught fire and was destroyed. It started to lose power and then immediately burst into flames and was a total loss. I feel this was a manufacture defect of some kind and would like to have this investigated. I do have pictures to provide you.”
NHTSA complaint #10155973, filed 2006-04, 63,000 miles“The consumer is concerned while traveling on the highway without prior warning the vehicle stalled. He was able to pull over and lift the hood up and noticed that battery acid had exploded from the battery. Please fill in additional information dealer is aware of the problem. Ts”
NHTSA complaint #10003766, filed 2003-01, 52,000 miles“Battery cables loosened from the battery post. This caused vehicle to lose power . Also, battery leaked acid onto the engine. Purchased new. At 11k miles the battery exploded due to a loose positive terminal nut within the battery casing. At 31k miles, the vehicle stalled on the roadway due to the positive battery cable disconnecting from the battery housing. The positive terminal nut came loose from the battery housing. At 44k miles, the positive battery post loosened again and leaked battery acid on the brake lines, the battery cables and the steel inner wheel liner. …”
NHTSA complaint #10063409, filed 2004-03Electrical system: other model years
Other parts of the 1999 GMC Denali
5 complaintsEngine cooling
1 complaintsSteering
1 complaintsSuspension
1 complaintsTransmission and drivetrain
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 1999 GMC Denali
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 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