Oil consumption, AFM, misfires, etc - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 5.3L V8 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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Old 02-07-2013, 03:14 PM
SunBum SunBum is offline
Junior Member
2006 Chevy TrailBlazer LT EXT
Silverstone Metallic 5.3L V8 2WD
Join Date: Jun 2007
Location: Atlanta, Ga
Posts: 15
Oil consumption, AFM, misfires, etc

I have a 2006 TB with the 5.3L V8. This thing has had way more than its reasonable share of problems. I'm on the second $3,000 cylinder head rebuild in 114,000 miles. I have gone through the proper customer assistance channels with Chevrolet to no avail.

I've done some research and I can see that the oil consumption issues leading to engine problems with this engine are NOT unique to me. I am interested in trying to gauge how widespread this issue is. I have a very basic website with a simple form to try gather some information so we can see if this is isolated or common.

If you have experienced similar oil consumption, AFM, misfire, fouled or cracked spark plugs I'd appreciate if you'd get me your basic information via the form on my website. I promise I'm not trying to sell anything or share your information without your approval. I just think that there should be some GM accountability if this does prove to be a widespread issue with these engines.


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Old 02-12-2013, 08:17 PM
kirkg1 kirkg1 is offline
Junior Member
2006 GMC Envoy Denali XL
Black 5.3L V8 4X4
Join Date: Jul 2006
Location: Indianapolis area
Posts: 41
^^ Same here. What is up?

I have been a life long GM fan. From the day my dad brought me home a 71 Olds convert. in '85 for my 16th B Day, I have owned 13 GMs. My grandparents retired from a plant in Anderson Indiana. My whole family drives mostly GMS. My brother is a top ASE cert. tech starting in a Chevy dealership 25 years ago. I have always maintained my cars very well. We currently own one of my favorite autos every and owned it longer than any other in my driving history... my 2006 Envoy Denali XL. Almost 2 years ago the transmission went out at 92k miles. It was almost paid off, and after careful consideration we decided we had to replace the tranny and keep it in stead of trading it in since we still loved the SUV. Now, at 110k- the motor has failed. GM V8's have had a history of going strong for many years and miles. My story seems so much like the OP above, after going to his site- I read that my motor is doing the same as his. Is it the DOD? Are these being engineered to last only up to 100k? My confidence has been crushed. Looks like a Re Manned Jasper motor will be dropped in her.
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Old 02-14-2013, 06:01 PM
moostadon moostadon is offline
Junior Member
2005 Chevy TrailBlazer LT EXT
Magnetic Red Metallic 5.3L V8 4X4
Join Date: Dec 2011
Location: west olive ,mi
Posts: 14
i have an 05 with the 5.3 with 190,000 on it it uses the oil more so when the oil is getting close to the change time ,but i was told they used low tension oil control rings to get the fuel milage up
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