Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

3.8

definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
32,429 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 GMC Envoy engine problems

engine problem

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2003 GMC Envoy Owner Comments

problem #7

Jul 072013

Envoy 4WD 6-cyl

  • 133,000 miles

A D V E R T I S E M E N T S

Some times when the brakes are applied the throttle also advances causing unwanted acceleration. Happens at low speeds. Have there been any factory recalls for this problem?

- Kent, WA, USA

problem #6

Apr 192006

Envoy 4WD 6-cyl

  • Automatic transmission
  • miles
Speedometer was not working. Took 2003 GMC Envoy to dealership 4 times when it was under warranty and technician said nothing was wrong with speedometer. However, the speedometer stopped on 50 mph when truckwas sitting still, sometimes higher number. Called GMC regarding the speedometer, no call back, and there was nothing they could do about. Truck is current not under warranty. Now have to pay $800 out of pocket for repairs.

- Mount Vernon, NY, USA

problem #5

Jul 012006

Envoy 6-cyl

  • Automatic transmission
  • miles
: the contact stated that the speedometer stopped working on a consistently. The vehicle was taken to the dealer who determined that the faulty speedometer was caused by a manufacture defect of the instrument panel and cluster. The speedometer needed to be replaced. The manufacture was notified. The vehicle has not been repaired nor replaced. The contact found many complaints (example: #10096707) concerning the electrical system.

- Ocean Springs, MS, USA

problem #4

Jan 242006

Envoy 6-cyl

  • Automatic transmission
  • 53,000 miles

A D V E R T I S E M E N T S

: the contact stated the speedometer stopped working without warning. The dealership determined the speedometer cluster needs to be replaced. Upon driving out of town for a few hours the speedometer read 120 mph in park. The contact took the vehicle to the original GMC dealership and service department. They determined it was the cluster that needed to be replaced, and that it would be 6-8 weeks until the part would be available because it was on back order due to the high volume of Envoy and Yukon that clusters needed to be replaced. The contact felt that if a number of GMC vehicles had faulty clusters then perhaps it should be recalled for at least for sub standard reasons, if not for safety reasons.

- Westlake, LA, USA

problem #3

Nov 172005

Envoy 6-cyl

  • Automatic transmission
  • 35,000 miles
Car: GMC Envoy 2003 when driving on a highway check engine light came on. "reduced power" light came on too. Engine rpms dropped down to 1100. Barely avoided crash. Made it to the parking lot. Restarted engine few times same problem. Executed "clear change oil light" procedure few times. It cleared "check engine" light and everything is normal now. The vehicle is equipped with "change oil" timer and light. It appears that when timer expired the computer rather than turning "change oil" light on enables "check engine" light and drastically reduces engine power. When it happens on a highway it can easily lead to a crash. I plan to take the vehicle to a dealership in two days. Thank you.

- Allen, TX, USA

problem #2

Feb 192004

(reported on)

Envoy 6-cyl

  • Automatic transmission
  • 6,000 miles
While stopped the engine ran at 900 RPM's. after the brake was released the RPM's climbed to 1100 and the vehicle accelerated suddenly. The dealer replaced the fuel emissions canister once, and reset the electrical codes, and replaced the fuel tank, but the problem recurred.

- Plant City, FL, USA

problem #1

Feb 012003

Envoy 6-cyl

  • Automatic transmission
  • 0 miles
2003 GMC Envoy high engine idle when slowing to stop engine will not return to idle until almost at a stop. When slowing if you do not touch the brake pedal the car will continue on a flat road at 30to 35 mph.GM answer to this point is that they all do it. I see this as a safety concern and on slipery road ccould cause the vehicle to skid not to mention unusual brake wear and fuel consumption. Thaks sam mcneil.

- Toms River, NJ, USA

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