multiple codes only when slick or snowing - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

Welcome Enthusiast! If you already own a Chevy TrailBlazer or GMC Envoy or perhaps thinking of purchasing such a vehicle, then you have come to the best TrailBlazer and Envoy site on the net! Rainier, Bravada, Ascender, and 9-7x owners welcome too!

You are currently viewing our site as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to search and post topics, communicate privately with other members, respond to polls, upload content, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.
Join Today!
Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems is the premier GMC Envoy Forum on the internet. Registered Users do not see the above ads.
Thread Tools
Old 01-02-2013, 08:11 PM
blkvoy22 blkvoy22 is offline
Junior Member
2006 GMC Envoy SLT
Black 4.2L I6 4X4
Join Date: Jan 2013
Location: midwest
Posts: 1
multiple codes only when slick or snowing

so this winter is my first winter with my envoy 06 slt black on black, anyhow the last couple times it has snowed (basically last couple weeks) my check engine light has come on but shuts off after a day. Well today i finally caught it on and in time to get into advanced.

Now when light comes on it in 2wd with stabilitrac and traction control all on.. also at times when i park even if light is not on the idle becomes rough, but if i shut it off and turn back on it becomes normal again...?! Here is the list see what we can get figured out and possible solutions:


think i need to clean out some sensors and throttle body and that should take care of most of them but not sure... let me know thanks
Reply With Quote Quick reply to this message
Sponsored Links
Old 01-03-2013, 03:46 PM
freddyboy61 freddyboy61 is offline
No longer with us
2004 GMC Envoy SLE XL
Summit White 4.2L I6 4X4
Join Date: Jul 2008
Location: Long Island, NY
Posts: 1,239
The "u" prefix codes are related to the serial data bus communications, you might have an intermittent connection somewhere.
B0244 is related to the ABS system and could be a wheel speed sensor going bad.
P0030 & P0135 are related to the heater circuit for the Oxygen sensor
P0506 is a low idle speed issue and cleaning the throttle body will probably get rid of that.
[U] [/U]
Reply With Quote Quick reply to this message
Old 01-16-2013, 08:04 PM
08 trailb 08 trailb is offline
Junior Member
2008 Chevy TrailBlazer LS
Light Pewter Metallic 4.2L I6 4X4
Join Date: Mar 2012
Location: kentucky
Posts: 8
We can't stop here! This is BAT COUNTRY!

I got some of the same codes
Reply With Quote Quick reply to this message
Sponsored Links

engine failure;engine, engine idle

Quick Reply

Register Now

In order to be able to post messages on the Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum forums, you must first register.

Please enter your desired user name, your email address and other required details in the form below.
(Only letters, numbers, dashes and underscores are permitted for user names)
The user name that you choose is permanent and can never be changed.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Where you live (ex: Philadephia, PA)
Vehicle Year
Choose your year
Or enter your choice here:
Vehicle Color
Choose your factory color (Custom, Not Listed & Two-Tones; Use Text Field Below)
Or enter your choice here:
Vehicle Make
Choose your make
Or enter your choice here:
Vehicle Model
Choose your model
Or enter your choice here:
Vehicle Engine
Choose your engine
Vehicle Drivetrain
Choose your vehicle drivetrain
Security Question
Fill in the blanks: Tra___oy
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

» Sponsors

Advertising Info

All times are GMT -4. The time now is 11:24 AM.

Chevy TrailBlazer and GMC Envoy Enthusiasts - Copyright 2004 - 2009 All Rights Reserved.
All trademarks referenced herein are property of their respective owners.
RSS Feed