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Showing results for tags 'losing the afm battle...'.
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When I bought my 2014 High Country in 2016, the first two 'upgrades' were a K&N air filter and a Flowmaster Force II Dual cat-back exhaust. K&N because everything I drive has K&N. Flowmaster because I wanted the sound of dual exhaust. I had no idea that I would then have to address the AFM drone with the Flowmaster system. It was silent on the stock exhaust since it had the 'valve' after the muffler. But the truck was too QUIET for my taste. From there, I started my quest to address the AFM drone. I realized that the only way to eliminate the drone with the Flowmaster system was to keep the engine in V8 mode. First, I tried selecting M5 whenever I put the truck in gear. That got tiresome... I wanted to use 6th gear! Then I happened upon the Range AFM disabler. $200 later and I figured I had the answer.... for all of 1 week. Then, the trouble codes, no-starts and battery drain became issues. I had to remove the Range every so often. Then, sometimes, it would go a whole week before it had an issue. Usually, the truck just wouldn't start. Or, it wouldn't start and it would flash a message about the brake system having an issue, or the trailer brake having an issue. So, I removed it, drove in M5, drove in D and tolerated the drone or put the Range back in. Never happy. Last week, I ordered the SCT X4 tuner thinking it could drop a 'tune' into my computer to remove the AFM. It can... with a catch. You have to buy a separate tune!!! So, I spend $400 for the device to find out that, for another $165 (or $325 if I want all of the other good tweaks), I can get a tune that turns AFM mode OFF. So, I currently have a new $400 paper weight. I failed to mention that somewhere along the way, I spent $250 on that GM Performance Borla muffler. I have my (cut) OEM exhaust on a shelf in the garage with the flapper valve. That GM Borla muffler is looking better every day... for $250 installed!!! I miss my 2003 Silverado that never had AFM. It had the K&N and a nice single outlet Borla exhaust. But, it was showing its age with transmission issues and an obsolete and aging sound system.
