CarComplaints.com 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.
Vehicle went into reduced power mode while driving along with Stabilitrak and traction control messages. Vehicle would not accelerate over idle. Had to shut down and restart vehicle in order to get it to go again until it happened again. Took to dealership and they cleaned the throttle body. Vehicle ran fine for a couple of day and did the same thing. Back to dealership and they replaced the throttle body.
Fast forward to January 2014 and the problem is back. 3 years 2 months and about 30k miles later. I replace the throttle body again and now vehicle is fine again. But this was the last straw with this vehicle. Traded it in yesterday. My apologizes to whoever buys it. Had two GM SUVs and they will be my last GM SUVs.
- rklein4,
Appleton, WI, US
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Car would not run at full power. Only drove about 30 mph. Not safe getting to dealer to fix.
- James S., Saratoga, WY, US