CEL came on yesterday, 2006 ODB trouble codes

[2006Tahoe2WD]

okay, doesn't look that bad. I'm not at that point yet. Let's see if I can resolve the P0442 (small evap leak) without needing to replace the pressure sensor.

 

[OR VietVet]

Plan on doing the pressure sensor. In so many threads about evap problems, I see where a piece meal effort is made and the OP keeps going back till all is replaced.

 

[Fless]

If there's a possibility that you'll need to drop the tank even a little, start shooting some PB Blaster or the like on those tank strap bolts.

Also think about having some new bolts ready in case yours get over-persuaded:

Dorman #55157 for the tank strap bolts and nuts; worked great on mine. The fitment apps might say they don't fit, but they do.

 

[2006Tahoe2WD]

Good idea. I'll take a look up there.
Regarding purge/seal testing using the Foxwell - I might be fighting the normal function. The ECU is performing the evap function as it should and someone jumps in with a scanner and attempts to run a purge/seal test. This might be why the purge valve doesn't close all the way during the test. Who wins - the ECU or the Foxwell?

 

[2006Tahoe2WD]

Today I installed a new OEM purge valve and Bank 1 Pre and Post O2 sensors. Will do Bank 2 later. Took it for a drive and then watched the graphs for the new O2s they were bouncing up and down nicely.
Below is a picture of a "new" O2 from RA. Had never seize on it. Are they supposed to come with never seize? I think it was a return. I cleaned it and installed in the downstream position. So far so good. There is no way to call RA - either return it or don't.

Also I see an oil leak picture attached. I think this is the infamous block off plate. Please advise. Install a new gasket?

 

[OR VietVet]

Yea, that O2 was a return. What brand did you get? I would only use Genuine GM, Delphi or Denso. The block off plate leak will happen again if just use a gasket. Use a Billet plate and seal. Can get at Amazon.

 

[2006Tahoe2WD]

The O2 was the GM OE from RA. Highest price one they had.

 

[2006Tahoe2WD]

Yea, that O2 was a return. What brand did you get? I would only use Genuine GM, Delphi or Denso. The block off plate leak will happen again if just use a gasket. Use a Billet plate and seal. Can get at Amazon.

Summit has this block off plate. Is this what you were thinking of?

 

[OR VietVet]

Summit has this block off plate. Is this what you were thinking of?

View attachment 421599

This is the same one I used on my 2002 Tahoe LT. Worked great.

 

[2006Tahoe2WD]

This is the same one I used on my 2002 Tahoe LT. Worked great,

Okay, excellent thanks.

 

[2006Tahoe2WD]

The shipping is $11 so I'm thinking to add spark plug wires and plugs. What else should I consider to spread the shipping out? I assume GM OE for wires. I used iridium of some brand for plugs. Been about 80k miles since I changed those.

 

[2006Tahoe2WD]

Found a oil block off plate on Amazon.

The brake light switch showed up - I got a P1574 code so I'll install an OEM switch.

Parts cannon is getting a good workout.

 

[2006Tahoe2WD]

Here is what appears to be solid info. on how to complete drive cycles for the different systems. The year of the Chevy isn't listed or I didn't see it.

How To Perform a Chevy Suburban Drive Cycle

(RESOLVED - Click To View) The EVAP, secondary air, and catalyst monitor are still showing as incomplete. I have driven my Suburban 300 miles since the first time I was aware of them not being ready? Is there any way besides the drive cycle to get them complete? Thanks

www.smogtips.com

 

[2006Tahoe2WD]

At the risk of getting flamed.... here is a video on cutting the floor. I don't plan to do this so far.

 

[2006Tahoe2WD]

Okay....here's an interesting development. I ordered a new brake switch (because I got a code P1574) and received GM PN 151285592 per RA. I noticed the switch was sort of the mirror image of what I took out. With some manipulation and installing the new switch upside-down I was able to get it in and connected. I went to drive the car and it would not come out of park. I put the original brake switch in and all was fine. See picture.
PN 15128592 will not work in my Tahoe it needs 25771554. I wonder if RA will give me my money back? See picture below.

 

[2006Tahoe2WD]

This could have been my ordering error - failing to read. The 15128592 switch seems like it might be for Tahoes with power adjustable pedals.

 

[2006Tahoe2WD]

Sort of makes sense - the 15128592 version of the switch mounts more out of the way probably because powered pedal parts need the room. That clip is not that easy to deal with. I think I'll see if the GM parts dept. here can get the correct one. Chalk that up to a mis-fire of the parts cannon.

 

[Donal]

Summit has this block off plate. Is this what you were thinking of?

View attachment 421599

If you are going to replace the OEM block off plate this ICT one, I want to purchase the OEM plate. I will send a USPS money order plus shipping . PM me with your mailing address.

 

[2006Tahoe2WD]

If you are going to replace the OEM block off plate this ICT one, I want to purchase the OEM plate. I will send a USPS money order plus shipping . PM me with your mailing address.

Sure. Did you try one of the AL plates and it didn't work or do you need the OEM plate for some other reason? You don't have to mention the reason I'm curious because if I send you the OEM plate and then need it back etc etc.

 

[Fless]

Here's the updated part number for non-power-adjustable pedals (https://www.gmpartsdirect.com/oem-parts/gm-brake-light-switch-15128874).

The 25771554 part should work, but 15128874 is the latest part number: