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Thread: Active Fuel Management
02-19-2010, 11:55 AM #1
- Join Date
- Feb 2010
- Independence, MO
Active Fuel Management
I am looking to buy a used silverado with 5.3L with active fuel management but have found many dealers don't advertise whether the vehicles have it or not. My father recently purchased a new 2009 silverado thinking just because it had the 5.3 it would have AFM but was disappointed when it was delivered and didn't. It is a real pain to call many of the dealers with used vehicles ask them and most of the time they have no clue or would just lie to get me to come in.
Short of opening the hood, is there something in the VIN or somewhere else on a truck that would indicate it has AFM? Is there somewhere under the hood that states it has AFM if I am able to?
02-19-2010, 12:25 PM #2
They have an emblem on the rear that says Flex Fuel.
02-19-2010, 12:53 PM #3
FlexFuel just means it can run E85 gas in it... doesn't mean it's got DOD/AFM...
usually, on the black plastic engine cover, it'll say right on it Active Fuel Management or Displacement on Demand
Last edited by 06MonteSS; 02-19-2010 at 12:57 PM.06MonteSS
2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
02-19-2010, 05:03 PM #4
02-19-2010, 06:03 PM #5
Majority of our customers ask for the AFM to be turned off.Black Bear Performance- Custom Tuning Solutions
Authorized EFILive and MAGNACHARGER seller
02-20-2010, 05:33 AM #6
the dealers know, they are just being lazy. the AFM engine and the flex fuel engine are two completely different engines
i dont remember which is which but one is an iron block and the other is an aluminum block
Last edited by vncj96; 02-20-2010 at 05:36 AM.99 K1500 Suburban LT "THE BEAST"
Hypertech III, K&N, true dual
02-20-2010, 08:13 AM #7
02-20-2010, 08:16 AM #8
all of which can be tweaked in a custom tune to change the behavior of it... like making it go into DOD/AFM sooner, stay in 4 cyl mode longer, etc etc..
02-20-2010, 08:22 AM #9
Sounds like more things to go wrong..
02-20-2010, 04:05 PM #10
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