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EnginePart report

2003 GMC Envoy Engine Problems

Complaints
10about this part
Share
3%of 394 total for the year
Median mileage
143,500miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 10 complaints about the engine of the 2003 GMC Envoy, 3% of the 394 complaints for this model year. Where a mileage was given, the median is 143,500 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 noticed a electrical burning smell while driving on a side street. The engine made an unusual noise so I pulled over, turned the car off and put on the hazard lights. While waiting for the tow truck, the car started with no key in the ignition. The car ran for a short time then stopped and attempted to restart itself about 5 times. Our mechanic took a look at it and said there had been a fire in the fuse box. I took pictures of the charred remains of the fuse box, cover and connectors. …”

NHTSA complaint #10724178, filed 2015-06, 169,000 miles

“It started with engine misfiring causing engine to jolt which damaged #4 coil pack seal to failed allowing water intrusion. In 2008, the Gmc mechanic replaced all six coils seals but in 2013-present p0440 engine code is a leak in the evaporative emission (evap). Loose fuel tank filler cap is the most common cause that triggers the p0440 code. I failed a few smog check spending hundreds of thousands of dollars yet my problem still existence. I've contacted the bureau of automotive repair because purrfect auto in fullerton,ca lied about fixing my car. …”

NHTSA complaint #10983794, filed 2017-05, 160,102 miles

“Gradual coolant loss over time and no evidence of leak. This was due to a crack in the cylinder head that GM admitted to knowing about in TSB 06-06-01-019b on june 12, 2007). Coolant was slowly leaking into the oil, but was unnoticeable until it started to affect oil pressure from the oil becoming slushy and ruining the engine. This ended up resulting in resulted in the low engine oil light suddenly coming on and the car to stop running on a highway. The engine started steaming and the car was overheating. …”

NHTSA complaint #11113393, filed 2018-07, 230,000 miles

“Car dies when driving, car wont start sometimes and hour or 2 later starts mechanic said alternator and battery are good, in parking lot and driving in the city”

NHTSA complaint #11003993, filed 2017-07, 114,000 miles

“The contact owns a 2003 Gmc Envoy. While operating the vehicle, the service engine light illuminated. While in four wheel drive mode, the vehicle would not accelerate. The vehicle was taken to the dealer where it was diagnosed that the icv was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 150,000.”

NHTSA complaint #10819707, filed 2016-01, 150,000 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2009424%
200845%
200784%
2006206%
2005143%
2004164%
2003103%
2002163%

Other parts of the 2003 GMC Envoy

Fuel system
94 complaintsElectrical system
77 complaintsVisibility (wipers, defrost, mirrors)
40 complaintsAir bags
37 complaintsTransmission and drivetrain
37 complaintsBody and structure
33 complaintsBrakes
26 complaintsExterior lighting
26 complaintsEngine cooling
25 complaintsSuspension
19 complaintsSeat belts
15 complaintsSteering
15 complaints

← All problems reported for the 2003 GMC Envoy

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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