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Electrical systemPart report

2006 GMC Envoy Denali XL Electrical system Problems

Complaints
6about this part
Share
14%of 42 total for the year
Median mileage
109,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the electrical system of the 2006 GMC Envoy Denali XL, 14% of the 42 complaints for this model year. Where a mileage was given, the median is 109,000 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.

“While driving, in pitch black darkness on 6/10/2016 around 1:00 am, my headlights suddenly went off. The only way I could obtain lights was using the high beams. Low beams do not work and high beam only works in manual on/off mode. We checked the lamps and fuses. All are in excellent condition. I have no lights while driving or in park. The side view mirrors move on there own and at any time, while driving , in park and when the car is not running. This has been going on since the door panel recall was repaired. The dealer has informed me that there is no recall on that either. …”

NHTSA complaint #10874048, filed 2016-06, 87,000 miles

“The vehicle will abruptly go from 70 MPH to 30's (semi-trailer closing in fast) and I can't do a thing about it!! Service stabilitrack has been a thorn while under warranty and persists to be a problem now that it is out of warranty! …”

NHTSA complaint #10953871, filed 2017-02, 165,043 miles

“Vehicle goes into reduced engine power mode unexpectedly while driving with no prior warning. Mil light turns on, reduced engine power light turns on, stabilitrak off dic message displays, results in loss of acceleration and requires the driver to immediately take emergency safety actions. Codes include p2135, p0121, and p060e. Issue is intermittent, appears more frequently in cold or wet conditions. The issue has occurred more than 10 times since the initial incident. Dealer unable to correct the issue by throttle body cleaning and PCM replacement. …”

NHTSA complaint #10491433, filed 2013-01, 20,000 miles

“The contact owns a 2006 Gmc Envoy Denali Xl. The contact stated that the vehicle failed to accelerate over 40 MPH. The contact also stated that the engine and the low fuel warning lights illuminated although the fuel level was at max. The vehicle was taken to the dealer where the contact was informed that the throttle body and fuel pump needed to be replaced. The failure mileage was 128,623 and the current mileage was 138,182...updated 04-03-13 updated 04/22/2013”

NHTSA complaint #10498043, filed 2013-02, 128,623 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2006614%

Other parts of the 2006 GMC Envoy Denali XL

Fuel system
19 complaintsEngine
5 complaintsTransmission and drivetrain
5 complaintsBrakes
4 complaintsExterior lighting
3 complaintsSuspension
3 complaintsVehicle speed control
3 complaintsAir bags
2 complaintsElectronic stability control
2 complaintsOther or unknown
2 complaintsBody and structure
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaints

← All problems reported for the 2006 GMC Envoy Denali XL

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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