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.


hardly worth mentioning
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
49,067 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 electrical problems

electrical problem

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2007 Chevrolet Suburban Owner Comments

problem #3

Feb 242016


  • 67,200 miles


The contact owns a 2007 Chevrolet Suburban. While attempting to start the vehicle, it began to shake and the check engine light illuminated on the instrument panel. The vehicle was taken to the dealer, but the failure could not be duplicated. While driving at various speeds, the vehicle began to slow down and the reduced engine power indicator illuminated on the instrument panel. As a result of the failure, the vehicle was almost T-boned by a tractor trailer. The vehicle was able to be maneuvered to the side of the road where it was restarted successfully. The vehicle was taken to the dealer where it was diagnosed that the throttle body and the brake switch would need to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was brought back to the dealer where it was diagnosed that the wiring to the ECM connector 2 and wiring harness needed to be changed. The vehicle was repaired, but the failure recurred shortly after the repair from the dealer. The manufacturer was made aware of the failure. The failure mileage was 67,200.

- Port Deposit, MD, USA

problem #2

Jun 212015


  • 80,000 miles
The contact owns a 2007 Chevrolet Suburban. While driving approximately 55 mph, the rear windshield wiper activated independently and all the warning indicators illuminated. There was a burning odor coming from the front and rear area of the vehicle. The contact discovered that the wiring into the fuse box was melted. The vehicle was taken to an independent mechanic where it was diagnosed that the main wiring harness had to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 80,000. The VIN was not available.

- Carroll, IA, USA

problem #1

Oct 172006


  • Automatic transmission
  • miles
Car is 2007 Chevrolet Suburban - 2 months old. Check engine and check air bag lights came on. Then, next day car would not start and was jumped easily. After 2 days at dealership service dept., decided it was the cdm. 15 days later cdm came in but, service techs found 4-5 wires "burnt up". wiring harness is broken. After 6 days wiring harness is in and being replaced currently. Dealership is not sure this will solve the problem.

- San Antonio, TX, USA

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