Another 5.3 with AFM bites the dust ~ Chevrolet Active Fuel Management Problems

**Enkeiavalanche** · 03-04-2013, 07:46 PM

How many miles since your last change? Did the dealer do it?

**Red Rado** · 03-04-2013, 08:29 PM

It's been ~1500 miles and the dealer changed the oil. I'm taking it in tomorrow for them to check it. When I called them today they said it would take a half hour or so since it would need to cool down before they could check it. Hopefully that means they will drain it to measure the amount lost.

**Enkeiavalanche** · 03-04-2013, 08:37 PM

They let it settle for a bit before they check it.. Did you have any Blue smoke?

**Red Rado** · 03-04-2013, 10:26 PM

No smoke. The only sign of anything wrong was the loud ticking noise. That caused me to check the oil and I am glad that I did. My daily commute is 120 miles so without oil my engine could have easily blown up before I had any other indication of a problem.

**zigger215** · 03-13-2013, 06:13 AM

Read earlier in the thread that the 6.2s in the Denalis have AFM, that is incorrect, it's not a feature until 2014...looking into a 13 Denali right now, AFM=not possible on the 6.2 for this year and older....

**msw007** · 03-13-2013, 01:57 PM

THIS IS A GM DESIGN FLAW!
THIS IS GOING TO BE MORE APPARENT IN THE COMING MONTHS AS THESE 2007-2009 MODEL YEARS START CREEPING UP ON THE 75K-85K SWEET SPOT MILEAGE.
GM IS TRYING TO HIDE THE FACT THEY HAVE A PROBLEM AND HAVE A BAND-AID SOLUTION.
YOU CANNOT CHECK IT WITHOUT A COMPLETE TEAR DOWN OF THE MOTOR.
IF YOU HAVE THE 5.3L MOTOR WITH AFM I WISH YOU LUCK.
MY STORY IS BELOW:

http://www.gmtruckclub.com/forum/sho...vice-Lights%29

**Sierraowner5.3** · 03-13-2013, 07:27 PM

i used my tuner to turn my afm off. O F F off. V8 mode 24/7 now.

and its staying that way.

Alex

**LEBARONCARS** · 03-16-2013, 02:07 PM

OH WOW what did I buy , problems I guess now 2009 silverado ltz with 5.3 ho motor with the fuel management
only 20,000 miles on it . first chev truck nightmare ??

**Conlan Rose** · 03-16-2013, 02:10 PM

Originally Posted by LEBARONCARS

OH WOW what did I buy , problems I guess now 2009 silverado ltz with 5.3 ho motor with the fuel management
only 20,000 miles on it . first chev truck nightmare ??

Well you'll have 60,000-70,000 miles until any problem may arise and by then GM hopefully will have a fix. Or you could turn the AFM off with a tuner.

**LEBARONCARS** · 03-16-2013, 02:57 PM

Alex have a 2009 with a 5.3 ho with fuel management , what tuner did you buy to turn this awfull
thing off . I believe that by turning the cylinders off they are running dry , causes wear anyway
hope you can help love this truck for looks and power

Garry