Print this page Notes: Engines shouldn't need a new quart of oil every 500-1000 miles, but for thousands of Suburban owners that's exactly what's happening. Engine oil consumption on aluminum block engines with Active Fuel Management (AFM) is out of control and owners are left looking for answers.

The most likely culprit is an uncovered AFM valve which, in many cases, can be covered under warranty. The problem is the issues don't stop there and many owners have been told by GM just to buy a new engine. Take one guess who they want to pick up the tab.


really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
41,487 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.

2007 Chevrolet Suburban fuel system problems

fuel system problem

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2007 Chevrolet Suburban Owner Comments

problem #6

Nov 102010


  • 75,000 miles


The contact owns a 2007 Chevrolet Suburban. The contact stated that fuel could be smelled from the interior cabin of the vehicle. The contact made repairs to the fuel system but none of the repairs remedied the odor. The contact was able to determine that the fuel tank was leaking and replaced the fitted. The contact stated that since the repair, the fuel odor could only be smelled after refueling the vehicle. The vehicle was not taken to the dealer. The failure mileage was 75,000.

- Big Spring, TX, USA

problem #5

May 012011

Suburban 8-cyl

  • 48,000 miles
We have a 2007 Chevy Suburban that has had 2 fuel level sensors replaced under warranty. We are now out of warranty with 48,000 miles on the vehicle and the fuel gauge is again displaying inaccurate fuel levels. We have twice ran out of fuel when the gauge showed a quarter tank.

- Edmond, OK, USA

problem #4

Jul 242009


  • 70,000 miles
Chevy Suburban 2007 fuel system issues included gas fume leaks. Attempted to have repair 4 times before being told by dealer a design flaw exist with fuel system.

- Donnellson, IA, USA

problem #3

May 152008


  • 18,000 miles


The contact owns a 2007 Chevrolet Suburban 1500. While placing fuel in the vehicle, the gasoline spews back out onto the contact. Also, the rear door opened automatically and the flip-N-fold seats flipped up and down while the vehicle was in motion. Lastly, the turn signals do not work. The contact took the vehicle to the dealer and they made her an offer; however, the contact refused. The vehicle was taken to the dealer on several occasions. The contact was aware of the safety risk involved. The failure mileage was 18,000 and current mileage was 25,000.

- Lancaster, WI, USA

problem #2

Aug 292008


  • 37,000 miles
Gas leaking from top of gas tank on Suburban. It has happened four times since June of 2007. Never know when it is going to happen, doesn't happen all of the time, about every 4 months. It isn't a little but a lot causing a puddle and a horrible gas smell for a couple of days in my vehicle. When this happens everyone around the station is astonished at how much it leaks and that I get in the vehicle and drive off. The service department claims to replace a valve when this happens, but then why does it happen again and again. Last weekend this happened to my family (3 kids under 4 are in the vehicle when this happens) while on vacation. Needless to say I was very scared and on the edge of my seat making sure we were not around anything hot or anybody smoking. As one cigarette would have put our vehicle into shooting flames. We were also all exposed to the fumes all weekend long.

- Pierre, SD, USA

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problem #1

Apr 112007


  • Automatic transmission
  • 920 miles
The contact owns a 2007 Chevrolet Suburban 1500. The contact stated that the vehicle has a strong gas odor that intensifies while accelerating to 60 mph. The vehicle is at the dealer who stated that they are clueless as to what is the cause of failure. The odor caused a 4 year old child to vomit and aggravates his asthma. The # of cylinders and engine size were unknown. The current mileage is 11,000 and failure mileage was 920.

- Sunland, CA, USA

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