Which parts fail
Components named in complaints (headlights, tail lights, turn signals, interior lights).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 GMC Envoy owners, lightly cleaned up (personal details are redacted by NHTSA).
ISSUE: Hazard Warning/Turn Signal Flasher Module Failure. DESCRIPTION: Right front and rear turn signal and right front and rear hazard warning not working outside or inside vehicle. Replaced burned out right front turn signal/hazard. Replaced right rear turn signal/hazard due to corrosion on base of bulb. Looked at fixtures when replacing and all appeared good but right turn signals and right hazard warnings still not operational outside or inside vehicle. AVAILABLE FOR INSPECTION: Yes, upon request. RISK/DANGER: Cannot use right blinker or hazard warning flashers to notify approaching or oncoming vehicles of right turn or hazard which could cause other vehicles to crash into stopped or slowing vehichle. CONFIRMED: No. INSPECTED: Not by anyone other than myself [redacted] , daughter of [redacted] owner). …
The contact owns a 2003 GMC Envoy. The contact stated that the headlights ceased to operate as needed. Upon taking the vehicle to a local Pep Boys, it was diagnosed that the electrical wiring harness was burned and needed to be replaced. Additionally, the bulbs needed to be replaced. The contact stated that the vehicle was repaired; however, the failure recurred. The vehicle was taken back the local Pep Boys, who replaced the electrical wiring harness and the bulbs a second time; however, the failure persisted. The dealer and the manufacturer were not notified of the failure. The vehicle was not repaired. The failure mileage was unknown.
Back door latches sticking/very hard to open and at times won't open at all. Visibility from wipers is very limited and not good. Rear exterior lights at times flicker and bulbs come loose at times
Tl* the contact owns a 2003 GMC Envoy. On three separate occasions, the low beam headlamps failed without warning. When the passenger's side turn signal was activated, the four-way hazard indicator illuminated. The vehicle was not diagnosed or repaired. The failure was intermittent. The vehicle was not included in NHTSA campaign number: 05V198000 (exterior lighting). The manufacturer was notified of the failure. The approximate failure mileage was 125,000.
Tl* the contact owns a 2003 GMC Envoy. While driving at 55 MPH, the low beam headlights were activated and unexpectedly failed to illuminate. The high beam headlights were engaged. The vehicle was taken to an independent mechanic, who stated that the low beam headlight module would need to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 192,000.
Tl* the contact owns a 2003 GMC Envoy. After parking the vehicle and attempting to exit, the driver and passenger side doors failed to unlock. In addition, while driving 45 MPH, the headlights blinked on and off and failed to remain illuminated. The vehicle was not diagnosed nor repaired. The manufacturer was notified of the failures. The approximate failure mileage was 188,343. The VIN was not available.
Tl* the contact owns a 2003 GMC Envoy. The contact stated that the vehicle failed to start. In addition, the headlights failed to illuminate while driving at night. There were no warning indicators illuminated. The vehicle was not taken to a dealer or an independent mechanic for diagnostic testing or repairs. The manufacturer was not notified of the failures. The approximate failure mileage was 70,000.
No damage to turn signal when I turn on left turn signal sometimes it doesn't work sometimes I can move steering wheel and it will come on for second other times nothing have to try to turn off and on sometimes works sometimes doesn't can not get a good reason why won't work. Have automotive experience at trouble shooting. Also nonsafety issue cruse control on blinker on same switch intermittent working
Tl* the contact owns a 2003 GMC Envoy. The contact stated that the brake lights stopped working on the vehicle. The vehicle was taken to the dealer and it was determined that the tail light stop lamp assembly needed to be replaced; however, the vehicle was not included in NHTSA campaign number: 04V527000 (exterior lighting). The vehicle had not been repaired. The failure mileage was 120,000.
Tl* the contact owns a 2003 GMC Envoy. While the vehicle was parked and turned off, the low beam head lamps continued to illuminate. The vehicle was taken to an independent mechanic who was unable to diagnose or repair the vehicle. The manufacturer was notified of the failure. The failure mileage was 144,000. ..updated 10/18/16 updated 03/09/17.
Related recalls
Exterior lighting › Turn signal
On certain trucks and sport utility vehicles, the driver wishing to signal a turn by moving the directional signal lever, (up or down) May cause the front marker/turn lights and rear turn lights to flash in a manner similar to hazard warning, rather than flashing on the desired side only.
Remedy: Dealers will replace the suspect flasher modules with a new flasher module designed with sealed relays and more durable contact material inside of the relays free of charge. The recall began on August 4, 2005.
NHTSA investigations
Loss of Headlights
The subject vehicles are model year (MY) 2002-2009 Chevrolet Trailblazer, GMC Envoy, 2004-2007 Buick Rainier, 2003-2008 Isuzu Ascender, 2005-2009 Saab 9-7X, 2002-2004 Oldsmobile Bravada, 2003-2006 Chevrolet SSR, 2005-2009 Buick Lacrosse, and 2006-2008 Pontiac Grand Prix. This scope includes the Trailblazer/Envoy variants: 2002-2006 Envoy XL/Trailblazer EXT and 2004-2005 Envoy XUV.
Brake lamp failure
GM states that some brake/tail lamp bulbs can prematurely become inoperative due to malfunctioning brake/tail lamp sockets.on March 2, 2004, GM initiated a 6-year/72,000 mile special policy for 989,487 subject vehicles to inspect and replace the rear brake/tail lamp bulb socket assemblies.on April 4, 2004, the office of defects investigation (odi) opened a preliminary evaluation (pe04-032) based on consumer…
Headlight complaints in other Envoy years
Frequently asked questions
How common are headlight problems on the 2003 GMC Envoy?
NHTSA has 26 complaints about the lights of the 2003 GMC Envoy, 7% of the model year's 394 complaints. The component named most often is brake lights (1 mentions).
Is there a recall for 2003 GMC Envoy headlight problems?
Yes — NHTSA recall 05V-198 (turn signal, May 5, 2005). Recall repairs are free at authorized dealers.
At what mileage do 2003 GMC Envoy headlight problems start?
Half of the complaints with a recorded mileage happened before about 127,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries to lights problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.