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Discussion Starter · #1 ·
this tsb came out on 12/18/07
just a little info for yall
document #2046112
SES Light Due To DTCs P0101 And/Or P0106 - Inspect Air Filter And/Or MAP Sensor - keywords 6.6L air diesel DTC engine freeze ice icing inlet intake LBZ LLY LMM mode power reduce reduced SES tube #PIP4298A - (12/18/2007)


Models:2006-2008 Chevrolet Silverado
2006-2008 GMC Sierra
with 6.6L Diesel Engine (RPOs LBZ, LLY, or LMM)



This PI was superseded to update repair suggestions. Please discard PIP4298.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2046112&evc=numSrch#ss1-2046112">Condition/Concern:

You may encounter a vehicle with reduced engine power and a SES light on due to DTC P0101 and/or P0106. The P0101 may be the result of an air filter that is packed with ice or snow. The P0106 may be the result of condensation that has frozen inside of the MAP sensor. The P0106 will only occur in areas where the vehicle is at, or below, freezing for a long period of time with or without snow.
If these DTCs are experienced in warmer climates where ice and snow is not a factor, this PI does not apply.
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=2046112&evc=numSrch#ss2-2046112">Recommendation/Instructions:

Complete the SI diagnostics for any DTC or symptom found. If a P0106 is stored and the concern above is experienced, inspect the MAP sensor inlet. If a P0101 is stored and the concern above is experienced, inspect the air filter to determine if it is packed with ice or snow. If there is condensation, water, or an oily substance in the MAP sensor inlet, or if the air filter is packed with ice or snow, perform the suggestions below and evaluate the concern:
  1. <LI type=1>Call the GM Technical Assistance Center (GM TAC) to order an updated air inlet tube that has an updated MAP sensor location. At this time, this updated air inlet tube is only available through GM TAC, not GMSPO. A TAC consultant will order a complete air inlet tube assembly for you by following the internal administrative details section of this PI. <LI type=1>Order new gaskets for the EGR valve, Intake Air Heater, and Intake Manifold Tube. There are two gaskets for the Intake Air Heater, one for the Intake Tube to Intake Manifold Tube, and two gaskets for the EGR valve to Intake Tube. <LI type=1>Refer to the "Intake Manifold Tube Replacement" procedure in SI and replace the air inlet tube with the updated air inlet tube received from TAC. <LI type=1>The original Map sensor will remain in it's original position. Disconnect the MAP sensor electrical connector and connect it to the new MAP sensor that is in the updated location. <LI type=1>The Intake Air Heater/Map sensor wiring harness is retained to the intake tube with a metal bracket and a bolt. Remove the bolt and re-route the wiring harness so it will reach the new MAP sensor location. Retain the wiring harness as needed. <LI type=1>Reprogram the ECM with the latest calibrations if they are not present already. <LI type=1>If the vehicle is equipped with a two-piece grill cover, install the grill cover portion only. Do not install the lower portion that covers the front bumper. If the vehicle is not equipped with a two-piece grill cover, supply the customer with the grill cover portion only. Do not install the lower portion that covers the front bumper. Notice: Some 2008 GMT900 Trucks (New Body Style) may be equipped with a combined, one-piece grill and bumper cover. Customers should follow the owner's manual for further instructions on using this cover, and they should not tow heavy loads with it installed. These vehicles should have the combined, one-piece grill and bumper cover replaced with a one piece grill cover (does not cover the bumper), which is Part # 25822811.
    <LI type=1>The customer should be instructed to only install the grill cover for cold weather driving. They can use the following guidelines so they know when to use the grill cover:
    Trailer Towing: Use it up to 1.7C (35 F)
    Non-Trailer Towing: Use it up to 4.5C (40 F)​
  2. On 2007 Models with engine RPO LMM only: Replace the air filter with the one listed in bulletin 07-06-04-033.
For reference, here is a photo of the original air inlet tube assembly mentioned above:

 

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Goodwrenchtech, Thanks very much for this helpful info. Not a big deal here in CenTex but others on here are really in need of a fix. Thanks again.
 

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This is for the guys that have been having problems in the cold right? Should I speak with my dealer and try to get this done just in case?

-David
 

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Goodwrenchtech, do you have a diagram of EGR location?
 

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Thx, Goodwrenchtech!
 

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Discussion Starter · #6 ·
egr is in the pic and for gm to fix the problem u will need to have a p0101 or p0106 set as a dtc, and yes this is a cold weather problem.
 

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So the idea is the cover for the grill will help prevent snow and ice buildup in the inlet tube, and not using the bumper cover will help dry condensation?
 

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Discussion Starter · #8 ·
sure
 

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How big of a trailer can I tow with grill cover installed? I thought the manual said no towing at all...

What's your thoughts...
 

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I love you man!!!!

I just got a P0106 code and reduced power mode during some zero degree weather last week. This is COOL!!!!

Thanks!
 

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Discussion Starter · #11 ·
glad i can help
also i don't know what gm says but i would not use the cover when towing unless your truck wont warm up. i have yet to put mine on and we have been below 0 a couple of times. never had a problem with truck warming up. also i have pulled 4 pace enclosed snowmobile trailer to the mountians and not had a problem keeping it warm. if you want to use it while towing i would monitor your egt's very close. they will get warmer.
 

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I've used mine and the grill cover for the GMT 900's are a ***** to get on and off. Lots of cussing and pulling and stretching and thinking that it won't fit. It was MUCH easier for my '05.
 

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Off topic here.....I finally located where the EGR blocker plate goes on the LMM. Holy hell! That thing is buried back by the firewall :mad:
 

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Thanks Goodwrench, I haven't used the cover and I have not had any heat issues, down to -10 so far and blowing snow w/no problems. I always tow a 5 place open trailer or 4 place enclosed.
 

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Thanks Goodwrenchtech, had the codes at 600kms and limp at 700kms, it was -25 C, got an email off to the stealer, much appreciated.
Gotta agree crashpilot that grill cover is a pain.
 

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Had no probs with mine; took it inside overnight to warm up, put it on...........a little stretch here and there, but not a prob.
 

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I actually think the new covers are easier to install then the old ones. The only problem I have is the pos fit on the bottom.-:t
 

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Yeah, that looks pretty fugly................have to address that in the spring for next season...........
 

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Could this be relevant on an 05 LLY? I have been seeing the P0101 code with a reduce in power but no P0106. Bay area of CA, not very cold, but some below freezing morning starts lately along with the new DTC mentioned above. I just cleaned the MAF as best I could and am going to see if the problem persists. Also I noted that when I was cleaning the MAF the two star bolts holding it into the intake tube were loose allowing the MAF to move around slightly. Could these be a reason for the problem? Thanks ALL.
 

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SES Light Due To DTCs P0101 And/Or P0106 - Inspect Air Filter And/Or MAP Sensor - keywords 6.6L air diesel DTC engine freeze ice icing inlet intake LBZ LLY LMM mode power reduce reduced SES tube #PIP4298A - (12/18/2007)


Models:2006-2008 Chevrolet Silverado
2006-2008 GMC Sierra
with 6.6L Diesel Engine (RPOs LBZ, LLY, or LMM)

You may encounter a vehicle with reduced engine power and a SES light on due to DTC P0101 and/or P0106. The P0101 may be the result of an air filter that is packed with ice or snow. The P0106 may be the result of condensation that has frozen inside of the MAP sensor. The P0106 will only occur in areas where the vehicle is at, or below, freezing for a long period of time with or without snow.
If these DTCs are experienced in warmer climates where ice and snow is not a factor, this PI does not apply.
I have to wonder, for all those guys that are saying they are cutting their airbox vanes for more power... If you live or drive in northern climes, as I do in northern IL, I'm not sure the airbox vane cutting is a good idea. When I pulled my airbox out to look at it, it seemed to me that the position and cant of those vanes is designed to throw water/snow away from the air filter, thereby preventing the filter from having direct impact with any precipitation. I left my vanes intact

Any thoughts?
 
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