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 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
30,000 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 AC / heater problems

AC / heater problem

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2007 Chevrolet Suburban Owner Comments

problem #1

Oct 062007


  • 30,000 miles


The contact owns a 2007 Chevrolet Suburban 1500. While driving various speeds or idling, a massive amount of heat comes out of the driver's side air conditioning unit. The dashboard and vents become excessively hot. The vehicle was not driven in extremely hot temperatures due to the excessive heat output. There were no warning lights illuminated on the instrument panel. The vehicle was taken to an authorized dealer and repaired. Recently, the failure recurred and the authorized dealer stated that the failure was related to a component in the climate control system. The vehicle has not yet been repaired. The contact was concerned of the safety risk involved with the overheated unit. The failure mileage was 30,000 and current mileage was 60,000.

- Hollyspring, MS, USA

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