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.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
26,444 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 transmission problems

transmission problem

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2007 Chevrolet Suburban Owner Comments

problem #8

Apr 152011


  • 42,500 miles


Transmission slipping when changing gears.

- Little Falls, NJ, USA

problem #7

Oct 032010


  • 34,000 miles
I have a 2007 Chevrolet 4WD Suburban ls that has its transmission rebuilt because the truck just won't go. It has 34K plus miles and 42 month old. I wanted to know if this is common on this kind of vehicle and why did it happen.

- Waxhaw, NC, USA

problem #6

Jan 252010


  • 53,185 miles
Third incident for this problem. While driving in (D) the transmission will disengage and the vehicle engine will rev up (3rd & 2nd gear) seem to work still. This has happened at various speeds from 25 to 55 mile per hour. Only one time has it been close to an accident while making a left hand turn with on coming traffic. The dealer has made inspections of the transmission once, the second time the dealership was unable to duplicate the problem after keeping the vehicle more than 5 days. The suggestion from the dealership manager was to wait for it to happen again, place the vehicle in either 3rd or 2nd gear drive it to the dealership leaving it in 3rd or 2nd gear applying the parking brake so that the manager and a mechanic can get into the vehicle and test what's wrong. The 3rd time this has happened it was around 8:30 P.M. and we were unable to take it in to be examined. This problem if it happens again while making a turn or at anytime with oncoming traffic could cause a serious accident.

- Lancaster, CA, USA

problem #5

Jul 072008


  • 65,414 miles


The contact owns a 2007 Chevrolet Suburban. Shortly after the vehicle received a transmission flush, it would not move forward in the drive position after being placed into reverse. The following day, the contact took the vehicle to the dealer and they replaced three plates, a valve, filter kit, and a gasket kit. The vehicle was repaired, but the failure recurred less than a year later after another transmission flush was performed. While driving 65 mph, the vehicle began to hesitate and the engine revved, but the vehicle was losing speed. She drove to a repair shop and the mechanic stated that the transmission was not shifting past first gear. The contact took the vehicle back to the dealer that performed the original repair, but they stated that it was no longer under warranty and was not their responsibility. Through online research, the contact found numerous complaints about this same defect. She believes that a recall should be issued. The failure mileage was 65,414 and current mileage was 123,000.

- Phoenix, AZ, USA

problem #4

Apr 022008

Suburban 8-cyl

  • 11,500 miles
Vehicle torque converter slips / disengages on inclines causing the vehicle to roll backwards after trying to proceed after a stop. Must be on the gas simultaneously with coming off the brake to prevent rolling backwards into cars or people. Happens in drive, third and first. Transmission locks in second. Torque converter also slips while at idle in gear causing a rough idle situation.

- Simi Valley, CA, USA

problem #3

Jul 012007

Suburban 8-cyl

  • Automatic transmission
  • 4,000 miles
The contact owns a 2007 Chevrolet Suburban 1500. The transmission locks up intermittently at various speeds. As a result, the vehicle becomes difficult to shift. The vehicle was taken to the dealer and they stated that unless the failure occurs frequently, they were unable to get an analysis. The vehicle has not yet been repaired. The contact has been to two different dealers. Chevrolet stated that nothing could be done. The failure mileage was 4,000 and current mileage was 12,500.

- Worlington, TX, USA

problem #2

Jan 272007

Suburban 4WD 8-cyl

  • Automatic transmission
  • miles
Fax from congressman on behalf of his constituent, resolving ongoing problems with her 2007 Chevrolet Suburban. The consumer stated the transmission was slipping. The dealer replaced the transmitter.

- Massapequa Park, NY, USA

problem #1

Mar 112007

Suburban 4WD 8-cyl

  • Automatic transmission
  • 950 miles
Stability light and traction control light on saying need serviced, check engine light on, transmission slips from 1st into 2nd, and vehicle makes noise making turns. Vehicle taken in for service but mechanic having trouble with codes. Vehicle is 07 Suburban with 961 miles.

- Reynoldsburg, OH, USA

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