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.

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definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
35,372 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 #10

May 282010


  • 145,000 miles


2003 GMC Envoy - check engine light & reduced engine power light. Vehicle slows to 20 mph losing power. My daughter was almost hit in the side of the vehicle as she lost power in the intersection. Thankfully, the oncoming vehicle was able to stop.

- Houston, TX, USA

problem #9

Jan 182010


  • 54,803 miles
Driving on us highway 20 at posted speed limit 55mph. Vehicle suddenly loses power with no response to accelerator inputs. Heavy traffic and limited pull off area. Vehicle will restart, drive 1-2 miles same problem. Gas gauge 1/3 full. No trouble codes. 3 occurrences in week. Vehicle is now parked in garage. Odometer less than 56000 miles. Each time no dash lights displayed. Message center displays stop engine.

- Oak Harbor, WA, USA

problem #8

Nov 222007

Envoy 6-cyl

  • Automatic transmission
  • 55,000 miles
The contact owns a 2003 GMC Envoy. While driving 65 mph, the oil warning indicator light illuminated and the vehicle came to a complete stop. The vehicle was steered to the side of the road and towed. The dealer stated that the engine locked and needed to be replaced due to an oil drain plug that loosened. The current and failure mileages were 55,000.

- Hyattsville , MD, USA

problem #7

Mar 142006

Envoy 6-cyl

  • Automatic transmission
  • 32,000 miles


: the contact stated while attempting to apply brake pressure at 5 mph or less the engine stalls without warning. The dealership was alerted. Updated 04/14/06.

- Las Vegas, NV, USA

problem #6

Aug 152005

Envoy 6-cyl

  • Automatic transmission
  • 34,000 miles
Vehicle overheating evident when traveling for long distances; with repeated checking starting with the dealer, they were unable to confirm diagnosis of problem which repeatedly got worse and after checking with a reputable repair shop problem has to do with gasket problem and cylinder head warping.

- Delray Beach, FL, USA

problem #5

Nov 152005

Envoy 4WD 6-cyl

  • Automatic transmission
  • 18,707 miles
The vehicle was in service 3 times within 14 days, GM says the problem was the ignition switch, I say the source of the problem has not been fixed. Engine stalled 6 times in moving traffic, the "ABS" warning light is on, some time the "check engine soon" light comes on. Dealer replaces throttle body injection assembly. Next day the vehicle stalls again with same symptoms. Dealer replaced ignition switch again. !4 hours later engine stalls in moving traffic. Dealer installs event recording device, engine stalls and identified low ignition voltage (6.7 vs 13.6 vdc). Source of problem could not be identified, dealer says vehicle is safe to drive. We filed a lemon law claim.

- Santa Barbara, CA, USA

problem #4

Oct 032004

Envoy 4WD 6-cyl

  • Automatic transmission
  • 8,202 miles


1) sequence of events - nothing happens when we try to start. -battery voltage ok, auto-headlights on, bright - instrument panel completely dead -2 hours later, instrument on the miles per hour instrument is going wild, back and forth finally sets at zero, now engine will start. Check engine light is on for the first time - radio looses preset station memory 2) it started about a week; we had problems starting the warm engine. 3) automatic climate control is working sort of, sometime not 4) the check oil came on, at that time there was plenty 5) the backup mirror option is always loosing the input 6) transmission problem light was on for a day some time ago while driving in sb and in 2 wd, called your service and was told to ignore the dealer replaced the ignition switch, a superficial fix as it turned out later when the ignition switch was replaced again. The cause of the problem was not identified.

- Santa Barbara, CA, USA

problem #3

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 #2

Sep 042003


  • miles
While driving about 65 mph on the highway engine check light appeared on the dashboard.

- Goodland, KS, USA

problem #1

Jun 032003

Envoy 4WD 6-cyl

  • Automatic transmission
  • 10 miles
One week ago I purchased a 2003 Envoy sle 4WD, it has 200 miles on it currently and noticed upon delivery that a molding around the drivers side door is crooked. And 2 days ago I noticed a large puddle of fresh oil under my vehicle, and my oil light went on this morning. I haven't even had this vehicle for one week and I have to take it in for repairs. This does not make me feel overly comfortable about my purchase.

- Redford, MI, USA

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