I have a 2003 Yukon SLT 4wd 5.3l that I can't inspected, it won't get ready for ecu inspection even though dash light isn't on. I've given up trying to put miles on it for the ecu to be ready. I was thinking of getting a salvage Yukon at auction and switch bodies since my body is in good shape. My question is will my nose clip fit a 2007 Yukon same engine. I thought they didn't change the platform until 2009???
2003 Vs 2007
- Thread starter zmann96
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Ever consider getting a replacement ecu? Have you made note of the diagnostic codes that are preventing you from passing inspection? Performing a change like you describe is going to add WAY more failure opportunities than it will resolve over the current situation.
Good luck, in any case.
P.S. I am sorry I'm unable to answer your main question.
Good luck, in any case.
P.S. I am sorry I'm unable to answer your main question.
swathdiver
Full Access Member
Your GMT800 wagon was made until 2006. GMT900 wagons began in model year 2007.
What exactly is not passing? Who do you know with a Tech-2 or equivalent for proper diagnostics?
iamdub
Full Access Member
As @swathdiver said, '03 and '07 are totally different body, frame and electronics styles.
It'd be easier and cheaper to fix your '03. I think you just need the proper diagnostics. On that note, I think I recall reading and/or hearing a few times recently that there is an odd issue with some of the GMT800 PCMs that cause just what you're describing.
DirtDigler
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I had that issue a while back. Took it to three different places, they all did the drive cycle but could not get it ready for smog (Cali thing). Kept getting Secondary Air not ready. The pump worked though as well as all other emissions doohickeys. Finally gave up and took it to the stealership. They said they flashed or updated ecu or whatever and that fixed it.
I did replace the ecu and it didn't help . I just tried looking up the data but it didn't save. I believe one was the Cats , I had replaced them. Thanks for responding
Thanks for the info, I haven't done that.
I guess it won't work anyways from what a few are saying about compatibility. Thanks for your input
I had made an appointment with a service diagnostics garage and he couldn't find a thing, felt bad and didn't charge me. He was equipped to dyno test and all the other diagnostics
I guess it's not worth spending the money to just move up to a 16 year old truck, Thanks
swathdiver
Full Access Member
Let me ask again, what exactly is not passing?
You need to stop asking such tough questions.
You need to stop asking such tough questions.
swathdiver
Full Access Member
Ok, good. First, how long has this been going on? Second, have you made repairs to any of these components and if yes, how many miles has it been since and how many tanks of gas?
1 incomplete Readiness Monitor - Evaporative System
DashCommand is reporting that i have 1 incomplete Readiness Monitor on my 05 Yukon 4.8L. It shows "Evaporative System" as the one not ready. What does this mean, and how to fix it or troubleshoot it ? There is now Check Engine light or codes etc other than this. I haven't had the battery out...
www.tahoeyukonforum.com
swathdiver
Full Access Member
You right but my caveat or distinction was made by referring to the wagons.2007 silverado classic model
Since you dropped the body swap idea and I believe you said the check engine light is out I assume the issue with smog is the readiness monitors are not setting.
EVAP can be not ready and pass if there are no codes set so that leaves the 02 sensor heater circuit, the EGR and secondary air injection as the items that will prevent passing inspection.
The EGR and the secondary injection are both exhaust related so I would bet a very small exhaust leak is the issue; just enough to keep the monitors from giving the all clear but not enough to set a code and turn on the check engine light.
The 02 heater circuit has to be the sensor, if it was an issue with the harness power a code would be set.
On the plus side non of that stuff matters except for the smog inspectionn, that doesn't help get it registered but it does make your ride a good candidate for someone wanting to LS swap a classic car or pickup
EVAP can be not ready and pass if there are no codes set so that leaves the 02 sensor heater circuit, the EGR and secondary air injection as the items that will prevent passing inspection.
The EGR and the secondary injection are both exhaust related so I would bet a very small exhaust leak is the issue; just enough to keep the monitors from giving the all clear but not enough to set a code and turn on the check engine light.
The 02 heater circuit has to be the sensor, if it was an issue with the harness power a code would be set.
On the plus side non of that stuff matters except for the smog inspectionn, that doesn't help get it registered but it does make your ride a good candidate for someone wanting to LS swap a classic car or pickup
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