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Electrical systemPart report

2002 Chevrolet Trailblazer EXT Electrical system Problems

Complaints
14about this part
Share
14%of 100 total for the year
Median mileage
64,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 14 complaints about the electrical system of the 2002 Chevrolet Trailblazer EXT, 14% of the 100 complaints for this model year. Where a mileage was given, the median is 64,000 miles. 2 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.

“2002 chevy trailblazer left brake light out after two repairs. There is a problem with this vehicle type other trailblazers have left light out as well. Dealer has repaired twice, now warranty is expired and police have pulled me over informing me that I need to get it fixed,again! I bought new lights still left won't work.”

NHTSA complaint #10138078, filed 2005-09, 20,000 miles

“Larger occurring issues which could effect safety include the vehicle randomly deciding to change from 2wd/a4wd/4wdh4wdl whenever it wants to under various weather/road conditions (including perfect weather and road surface) and occasional random ignition system failure this is not safe at all I have taken it to the chevy dealership and they said it is a safety issue and that they need to do a recall on it they have had several rigs like this one come in for the same issue .. I believe that chevy GM needs to do a recall and have this fixed before I or someone else is injured or killed..”

NHTSA complaint #10392216, filed 2011-03, 130,000 miles

“Pulled into driveway, lights would not go off, a few minutes later smoke was coming out from under hood and it smelled like burning plastic. Popped hood and fuse block and relay we smoking and melting! Got fire extinguished and pulled the head light relay switch, but it had melted through the block!!!!”

NHTSA complaint #10525761, filed 2013-07, 177,000 miles

“The headlight wiring inside of the lens assembly over heats and melts the electrical connector going to the bulb and the insulation on the wiring. This has happened to both headlights on more than one occasion. Had to go and have the electrical wiring plus connector replaced.”

NHTSA complaint #10522271, filed 2013-06, 128,000 miles

“Outside temperature displaying 50 degrees regardless of actual outside temperature. When actual temperatures below freezing this represents a hazard. When temperatures above 50 degrees air conditioning not responsive (even when temperatures in excess of 100 degrees, heater comes on due to erroneous outdoor temperature reading). Poor fuel mileage results from incorrect air/fuel mixture at actual air temperatures more than 20 degrees +/- 50 degree system temperature.”

NHTSA complaint #10535148, filed 2013-08, 65,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
20064122%
200414556%
20037725%
20021414%

Other parts of the 2002 Chevrolet Trailblazer EXT

Fuel system
23 complaintsTransmission and drivetrain
20 complaintsEngine cooling
14 complaintsExterior lighting
10 complaintsVisibility (wipers, defrost, mirrors)
10 complaintsLatches, locks and linkages
6 complaintsBody and structure
5 complaintsEquipment
4 complaintsSuspension
4 complaintsOther or unknown
2 complaintsAir bags
1 complaintsSeat belts
1 complaints

← All problems reported for the 2002 Chevrolet Trailblazer EXT

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